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 75*c760fc19SHyok S. Choiconfig VECTORS_BASE 76*c760fc19SHyok S. Choi hex 77*c760fc19SHyok S. Choi default 0xffff0000 if MMU 78*c760fc19SHyok S. Choi default DRAM_BASE if REMAP_VECTORS_TO_RAM 79*c760fc19SHyok S. Choi default 0x00000000 80*c760fc19SHyok S. Choi help 81*c760fc19SHyok S. Choi The base address of exception vectors. 82*c760fc19SHyok S. Choi 831da177e4SLinus Torvaldssource "init/Kconfig" 841da177e4SLinus Torvalds 851da177e4SLinus Torvaldsmenu "System Type" 861da177e4SLinus Torvalds 871da177e4SLinus Torvaldschoice 881da177e4SLinus Torvalds prompt "ARM system type" 896a0e2430SCatalin Marinas default ARCH_VERSATILE 901da177e4SLinus Torvalds 911da177e4SLinus Torvaldsconfig ARCH_CLPS7500 921da177e4SLinus Torvalds bool "Cirrus-CL-PS7500FE" 931da177e4SLinus Torvalds select TIMER_ACORN 94f7e68bbfSRussell King select ISA 95f999b8bdSMartin Michlmayr help 96f999b8bdSMartin Michlmayr Support for the Cirrus Logic PS7500FE system-on-a-chip. 971da177e4SLinus Torvalds 981da177e4SLinus Torvaldsconfig ARCH_CLPS711X 991da177e4SLinus Torvalds bool "CLPS711x/EP721x-based" 100f999b8bdSMartin Michlmayr help 101f999b8bdSMartin Michlmayr Support for Cirrus Logic 711x/721x based boards. 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvaldsconfig ARCH_CO285 1041da177e4SLinus Torvalds bool "Co-EBSA285" 1051da177e4SLinus Torvalds select FOOTBRIDGE 1061da177e4SLinus Torvalds select FOOTBRIDGE_ADDIN 107f999b8bdSMartin Michlmayr help 108f999b8bdSMartin Michlmayr Support for Intel's EBSA285 companion chip. 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvaldsconfig ARCH_EBSA110 1111da177e4SLinus Torvalds bool "EBSA-110" 112f7e68bbfSRussell King select ISA 1131da177e4SLinus Torvalds help 1141da177e4SLinus Torvalds This is an evaluation board for the StrongARM processor available 115f6c8965aSMartin Michlmayr from Digital. It has limited hardware on-board, including an 1161da177e4SLinus Torvalds Ethernet interface, two PCMCIA sockets, two serial ports and a 1171da177e4SLinus Torvalds parallel port. 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE 1201da177e4SLinus Torvalds bool "FootBridge" 1211da177e4SLinus Torvalds select FOOTBRIDGE 122f999b8bdSMartin Michlmayr help 123f999b8bdSMartin Michlmayr Support for systems based on the DC21285 companion chip 124f999b8bdSMartin Michlmayr ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvaldsconfig ARCH_INTEGRATOR 1271da177e4SLinus Torvalds bool "Integrator" 1281da177e4SLinus Torvalds select ARM_AMBA 1291da177e4SLinus Torvalds select ICST525 130f999b8bdSMartin Michlmayr help 131f999b8bdSMartin Michlmayr Support for ARM's Integrator platform. 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvaldsconfig ARCH_IOP3XX 1341da177e4SLinus Torvalds bool "IOP3xx-based" 135f7e68bbfSRussell King select PCI 136f999b8bdSMartin Michlmayr help 137f999b8bdSMartin Michlmayr Support for Intel's IOP3XX (XScale) family of processors. 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvaldsconfig ARCH_IXP4XX 1401da177e4SLinus Torvalds bool "IXP4xx-based" 1411da177e4SLinus Torvalds select DMABOUNCE 142f7e68bbfSRussell King select PCI 143f999b8bdSMartin Michlmayr help 144f999b8bdSMartin Michlmayr Support for Intel's IXP4XX (XScale) family of processors. 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvaldsconfig ARCH_IXP2000 1471da177e4SLinus Torvalds bool "IXP2400/2800-based" 148f7e68bbfSRussell King select PCI 149f999b8bdSMartin Michlmayr help 150f999b8bdSMartin Michlmayr Support for Intel's IXP2400/2800 (XScale) family of processors. 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvaldsconfig ARCH_L7200 1531da177e4SLinus Torvalds bool "LinkUp-L7200" 1541da177e4SLinus Torvalds select FIQ 1551da177e4SLinus Torvalds help 1561da177e4SLinus Torvalds Say Y here if you intend to run this kernel on a LinkUp Systems 1571da177e4SLinus Torvalds L7200 Software Development Board which uses an ARM720T processor. 1581da177e4SLinus Torvalds Information on this board can be obtained at: 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds <http://www.linkupsys.com/> 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds If you have any questions or comments about the Linux kernel port 1631da177e4SLinus Torvalds to this board, send e-mail to <sjhill@cotw.com>. 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvaldsconfig ARCH_PXA 1661da177e4SLinus Torvalds bool "PXA2xx-based" 167034d2f5aSAl Viro select ARCH_MTD_XIP 168f999b8bdSMartin Michlmayr help 169f999b8bdSMartin Michlmayr Support for Intel's PXA2XX processor line. 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvaldsconfig ARCH_RPC 1721da177e4SLinus Torvalds bool "RiscPC" 1731da177e4SLinus Torvalds select ARCH_ACORN 1741da177e4SLinus Torvalds select FIQ 1751da177e4SLinus Torvalds select TIMER_ACORN 176a08b6b79Sviro@ZenIV.linux.org.uk select ARCH_MAY_HAVE_PC_FDC 177065909b9SRussell King select ISA_DMA_API 1781da177e4SLinus Torvalds help 1791da177e4SLinus Torvalds On the Acorn Risc-PC, Linux can support the internal IDE disk and 1801da177e4SLinus Torvalds CD-ROM interface, serial and parallel port, and the floppy drive. 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvaldsconfig ARCH_SA1100 1831da177e4SLinus Torvalds bool "SA1100-based" 184f7e68bbfSRussell King select ISA 1853cd9e19eSRussell King select ARCH_DISCONTIGMEM_ENABLE 186034d2f5aSAl Viro select ARCH_MTD_XIP 187f999b8bdSMartin Michlmayr help 188f999b8bdSMartin Michlmayr Support for StrongARM 11x0 based boards. 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvaldsconfig ARCH_S3C2410 1911da177e4SLinus Torvalds bool "Samsung S3C2410" 1921da177e4SLinus Torvalds help 1931da177e4SLinus Torvalds Samsung S3C2410X CPU based systems, such as the Simtec Electronics 1941da177e4SLinus Torvalds BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or 195f6c8965aSMartin Michlmayr the Samsung SMDK2410 development board (and derivatives). 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvaldsconfig ARCH_SHARK 1981da177e4SLinus Torvalds bool "Shark" 199f7e68bbfSRussell King select ISA 200f7e68bbfSRussell King select ISA_DMA 201f7e68bbfSRussell King select PCI 202f999b8bdSMartin Michlmayr help 203f999b8bdSMartin Michlmayr Support for the StrongARM based Digital DNARD machine, also known 204f999b8bdSMartin Michlmayr as "Shark" (<http://www.shark-linux.de/shark.html>). 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvaldsconfig ARCH_LH7A40X 2071da177e4SLinus Torvalds bool "Sharp LH7A40X" 2081da177e4SLinus Torvalds help 2091da177e4SLinus Torvalds Say Y here for systems based on one of the Sharp LH7A40X 2101da177e4SLinus Torvalds System on a Chip processors. These CPUs include an ARM922T 2111da177e4SLinus Torvalds core with a wide array of integrated devices for 2121da177e4SLinus Torvalds hand-held and low-power applications. 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvaldsconfig ARCH_OMAP 2151da177e4SLinus Torvalds bool "TI OMAP" 216f999b8bdSMartin Michlmayr help 217f999b8bdSMartin Michlmayr Support for TI's OMAP platform (OMAP1 and OMAP2). 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvaldsconfig ARCH_VERSATILE 2201da177e4SLinus Torvalds bool "Versatile" 2211da177e4SLinus Torvalds select ARM_AMBA 222fa0fe48fSRussell King select ARM_VIC 2231da177e4SLinus Torvalds select ICST307 2241da177e4SLinus Torvalds help 2251da177e4SLinus Torvalds This enables support for ARM Ltd Versatile board. 2261da177e4SLinus Torvalds 2278ad68bbfSCatalin Marinasconfig ARCH_REALVIEW 2288ad68bbfSCatalin Marinas bool "RealView" 2298ad68bbfSCatalin Marinas select ARM_AMBA 2308ad68bbfSCatalin Marinas select ICST307 2318ad68bbfSCatalin Marinas help 2328ad68bbfSCatalin Marinas This enables support for ARM Ltd RealView boards. 2338ad68bbfSCatalin Marinas 2341da177e4SLinus Torvaldsconfig ARCH_IMX 2351da177e4SLinus Torvalds bool "IMX" 236f999b8bdSMartin Michlmayr help 237f999b8bdSMartin Michlmayr Support for Motorola's i.MX family of processors (MX1, MXL). 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvaldsconfig ARCH_H720X 2401da177e4SLinus Torvalds bool "Hynix-HMS720x-based" 241065909b9SRussell King select ISA_DMA_API 2421da177e4SLinus Torvalds help 2431da177e4SLinus Torvalds This enables support for systems based on the Hynix HMS720x 2441da177e4SLinus Torvalds 245038c5b60SBellido Nicolasconfig ARCH_AAEC2000 246038c5b60SBellido Nicolas bool "Agilent AAEC-2000 based" 247049eb329SBellido Nicolas select ARM_AMBA 248038c5b60SBellido Nicolas help 249038c5b60SBellido Nicolas This enables support for systems based on the Agilent AAEC-2000 250038c5b60SBellido Nicolas 25173a59c1cSSAN Peopleconfig ARCH_AT91RM9200 25273a59c1cSSAN People bool "AT91RM9200" 25373a59c1cSSAN People help 254f999b8bdSMartin Michlmayr Say Y here if you intend to run this kernel on an Atmel 255f999b8bdSMartin Michlmayr AT91RM9200-based board. 25673a59c1cSSAN People 2571da177e4SLinus Torvaldsendchoice 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig" 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig" 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig" 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvaldssource "arch/arm/mach-iop3xx/Kconfig" 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig" 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvaldssource "arch/arm/mach-ixp2000/Kconfig" 2701da177e4SLinus Torvalds 2711da177e4SLinus Torvaldssource "arch/arm/mach-pxa/Kconfig" 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvaldssource "arch/arm/mach-sa1100/Kconfig" 2741da177e4SLinus Torvalds 275d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig" 276d48af15eSTony Lindgren 277d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig" 2781da177e4SLinus Torvalds 2791dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig" 2801dbae815STony Lindgren 2811da177e4SLinus Torvaldssource "arch/arm/mach-s3c2410/Kconfig" 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvaldssource "arch/arm/mach-lh7a40x/Kconfig" 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvaldssource "arch/arm/mach-imx/Kconfig" 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvaldssource "arch/arm/mach-h720x/Kconfig" 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig" 2901da177e4SLinus Torvalds 291038c5b60SBellido Nicolassource "arch/arm/mach-aaec2000/Kconfig" 292038c5b60SBellido Nicolas 2938ad68bbfSCatalin Marinassource "arch/arm/mach-realview/Kconfig" 2948ad68bbfSCatalin Marinas 29573a59c1cSSAN Peoplesource "arch/arm/mach-at91rm9200/Kconfig" 29673a59c1cSSAN People 2971da177e4SLinus Torvalds# Definitions to make life easier 2981da177e4SLinus Torvaldsconfig ARCH_ACORN 2991da177e4SLinus Torvalds bool 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvaldssource arch/arm/mm/Kconfig 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER 3041da177e4SLinus Torvaldsconfig XSCALE_PMU 3051da177e4SLinus Torvalds bool 3061da177e4SLinus Torvalds depends on CPU_XSCALE && !XSCALE_PMU_TIMER 3071da177e4SLinus Torvalds default y 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvaldsendmenu 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvaldssource "arch/arm/common/Kconfig" 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvaldsconfig FORCE_MAX_ZONEORDER 3141da177e4SLinus Torvalds int 3151da177e4SLinus Torvalds depends on SA1111 3161da177e4SLinus Torvalds default "9" 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvaldsmenu "Bus support" 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvaldsconfig ARM_AMBA 3211da177e4SLinus Torvalds bool 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvaldsconfig ISA 3241da177e4SLinus Torvalds bool 3251da177e4SLinus Torvalds help 3261da177e4SLinus Torvalds Find out whether you have ISA slots on your motherboard. ISA is the 3271da177e4SLinus Torvalds name of a bus system, i.e. the way the CPU talks to the other stuff 3281da177e4SLinus Torvalds inside your box. Other bus systems are PCI, EISA, MicroChannel 3291da177e4SLinus Torvalds (MCA) or VESA. ISA is an older system, now being displaced by PCI; 3301da177e4SLinus Torvalds newer boards don't support it. If you have ISA, say Y, otherwise N. 3311da177e4SLinus Torvalds 332065909b9SRussell King# Select ISA DMA controller support 3331da177e4SLinus Torvaldsconfig ISA_DMA 3341da177e4SLinus Torvalds bool 335065909b9SRussell King select ISA_DMA_API 3361da177e4SLinus Torvalds 337065909b9SRussell King# Select ISA DMA interface 3385cae841bSAl Viroconfig ISA_DMA_API 3395cae841bSAl Viro bool 3405cae841bSAl Viro 3411da177e4SLinus Torvaldsconfig PCI 342c0da085aSCatalin Marinas bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB 3431da177e4SLinus Torvalds help 3441da177e4SLinus Torvalds Find out whether you have a PCI motherboard. PCI is the name of a 3451da177e4SLinus Torvalds bus system, i.e. the way the CPU talks to the other stuff inside 3461da177e4SLinus Torvalds your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 3471da177e4SLinus Torvalds VESA. If you have PCI, say Y, otherwise N. 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds The PCI-HOWTO, available from 3501da177e4SLinus Torvalds <http://www.tldp.org/docs.html#howto>, contains valuable 3511da177e4SLinus Torvalds information about which PCI hardware does work under Linux and which 3521da177e4SLinus Torvalds doesn't. 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds# Select the host bridge type 3551da177e4SLinus Torvaldsconfig PCI_HOST_VIA82C505 3561da177e4SLinus Torvalds bool 3571da177e4SLinus Torvalds depends on PCI && ARCH_SHARK 3581da177e4SLinus Torvalds default y 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvaldssource "drivers/pci/Kconfig" 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig" 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvaldsendmenu 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvaldsmenu "Kernel Features" 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvaldsconfig SMP 3691da177e4SLinus Torvalds bool "Symmetric Multi-Processing (EXPERIMENTAL)" 370f6db449cSRussell King depends on EXPERIMENTAL && REALVIEW_MPCORE 3711da177e4SLinus Torvalds help 3721da177e4SLinus Torvalds This enables support for systems with more than one CPU. If you have 3731da177e4SLinus Torvalds a system with only one CPU, like most personal computers, say N. If 3741da177e4SLinus Torvalds you have a system with more than one CPU, say Y. 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds If you say N here, the kernel will run on single and multiprocessor 3771da177e4SLinus Torvalds machines, but will use only one CPU of a multiprocessor machine. If 3781da177e4SLinus Torvalds you say Y here, the kernel will run on many, but not all, single 3791da177e4SLinus Torvalds processor machines. On a single processor machine, the kernel will 3801da177e4SLinus Torvalds run faster if you say N here. 3811da177e4SLinus Torvalds 38212c62c2eSArthur Othieno See also the <file:Documentation/smp.txt>, 38312c62c2eSArthur Othieno <file:Documentation/i386/IO-APIC.txt>, 3841da177e4SLinus Torvalds <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 3851da177e4SLinus Torvalds <http://www.linuxdoc.org/docs.html#howto>. 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds If you don't know what to do here, say N. 3881da177e4SLinus Torvalds 3891da177e4SLinus Torvaldsconfig NR_CPUS 3901da177e4SLinus Torvalds int "Maximum number of CPUs (2-32)" 3911da177e4SLinus Torvalds range 2 32 3921da177e4SLinus Torvalds depends on SMP 3931da177e4SLinus Torvalds default "4" 3941da177e4SLinus Torvalds 395a054a811SRussell Kingconfig HOTPLUG_CPU 396a054a811SRussell King bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 397a054a811SRussell King depends on SMP && HOTPLUG && EXPERIMENTAL 398a054a811SRussell King help 399a054a811SRussell King Say Y here to experiment with turning CPUs off and on. CPUs 400a054a811SRussell King can be controlled through /sys/devices/system/cpu. 401a054a811SRussell King 40237ee16aeSRussell Kingconfig LOCAL_TIMERS 40337ee16aeSRussell King bool "Use local timer interrupts" 4042a98beb6SRussell King depends on SMP && REALVIEW_MPCORE 40537ee16aeSRussell King default y 40637ee16aeSRussell King help 40737ee16aeSRussell King Enable support for local timers on SMP platforms, rather then the 40837ee16aeSRussell King legacy IPI broadcast method. Local timers allows the system 40937ee16aeSRussell King accounting to be spread across the timer interval, preventing a 41037ee16aeSRussell King "thundering herd" at every timer tick. 41137ee16aeSRussell King 4121da177e4SLinus Torvaldsconfig PREEMPT 4131da177e4SLinus Torvalds bool "Preemptible Kernel (EXPERIMENTAL)" 4141da177e4SLinus Torvalds depends on EXPERIMENTAL 4151da177e4SLinus Torvalds help 4161da177e4SLinus Torvalds This option reduces the latency of the kernel when reacting to 4171da177e4SLinus Torvalds real-time or interactive events by allowing a low priority process to 4181da177e4SLinus Torvalds be preempted even if it is in kernel mode executing a system call. 4191da177e4SLinus Torvalds This allows applications to run more reliably even when the system is 4201da177e4SLinus Torvalds under load. 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds Say Y here if you are building a kernel for a desktop, embedded 4231da177e4SLinus Torvalds or real-time system. Say N if you are unsure. 4241da177e4SLinus Torvalds 4258749af68SRussell Kingconfig NO_IDLE_HZ 4268749af68SRussell King bool "Dynamic tick timer" 4278749af68SRussell King help 4288749af68SRussell King Select this option if you want to disable continuous timer ticks 4298749af68SRussell King and have them programmed to occur as required. This option saves 4308749af68SRussell King power as the system can remain in idle state for longer. 4318749af68SRussell King 4328749af68SRussell King By default dynamic tick is disabled during the boot, and can be 4338749af68SRussell King manually enabled with: 4348749af68SRussell King 4358749af68SRussell King echo 1 > /sys/devices/system/timer/timer0/dyn_tick 4368749af68SRussell King 4378749af68SRussell King Alternatively, if you want dynamic tick automatically enabled 4388749af68SRussell King during boot, pass "dyntick=enable" via the kernel command string. 4398749af68SRussell King 440f2be64b3STony Lindgren Please note that dynamic tick may affect the accuracy of 441f2be64b3STony Lindgren timekeeping on some platforms depending on the implementation. 442569d2c34SNicolas Pitre Currently at least OMAP, PXA2xx and SA11x0 platforms are known 443569d2c34SNicolas Pitre to have accurate timekeeping with dynamic tick. 444f2be64b3STony Lindgren 445704bdda0SNicolas Pitreconfig AEABI 446704bdda0SNicolas Pitre bool "Use the ARM EABI to compile the kernel" 447704bdda0SNicolas Pitre help 448704bdda0SNicolas Pitre This option allows for the kernel to be compiled using the latest 449704bdda0SNicolas Pitre ARM ABI (aka EABI). This is only useful if you are using a user 450704bdda0SNicolas Pitre space environment that is also compiled with EABI. 451704bdda0SNicolas Pitre 452704bdda0SNicolas Pitre Since there are major incompatibilities between the legacy ABI and 453704bdda0SNicolas Pitre EABI, especially with regard to structure member alignment, this 454704bdda0SNicolas Pitre option also changes the kernel syscall calling convention to 455704bdda0SNicolas Pitre disambiguate both ABIs and allow for backward compatibility support 456704bdda0SNicolas Pitre (selected with CONFIG_OABI_COMPAT). 457704bdda0SNicolas Pitre 458704bdda0SNicolas Pitre To use this you need GCC version 4.0.0 or later. 459704bdda0SNicolas Pitre 4606c90c872SNicolas Pitreconfig OABI_COMPAT 461a73a3ff1SRussell King bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 46261c484d4SNicolas Pitre depends on AEABI && EXPERIMENTAL 4636c90c872SNicolas Pitre default y 4646c90c872SNicolas Pitre help 4656c90c872SNicolas Pitre This option preserves the old syscall interface along with the 4666c90c872SNicolas Pitre new (ARM EABI) one. It also provides a compatibility layer to 4676c90c872SNicolas Pitre intercept syscalls that have structure arguments which layout 4686c90c872SNicolas Pitre in memory differs between the legacy ABI and the new ARM EABI 4696c90c872SNicolas Pitre (only for non "thumb" binaries). This option adds a tiny 4706c90c872SNicolas Pitre overhead to all syscalls and produces a slightly larger kernel. 4716c90c872SNicolas Pitre If you know you'll be using only pure EABI user space then you 4726c90c872SNicolas Pitre can say N here. If this option is not selected and you attempt 4736c90c872SNicolas Pitre to execute a legacy ABI binary then the result will be 4746c90c872SNicolas Pitre UNPREDICTABLE (in fact it can be predicted that it won't work 4756c90c872SNicolas Pitre at all). If in doubt say Y. 4766c90c872SNicolas Pitre 4773f22ab27SDave Hansenconfig ARCH_DISCONTIGMEM_ENABLE 4781da177e4SLinus Torvalds bool 479f7e68bbfSRussell King default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) 4801da177e4SLinus Torvalds help 4811da177e4SLinus Torvalds Say Y to support efficient handling of discontiguous physical memory, 4821da177e4SLinus Torvalds for architectures which are either NUMA (Non-Uniform Memory Access) 4831da177e4SLinus Torvalds or have huge holes in the physical address space for other reasons. 4841da177e4SLinus Torvalds See <file:Documentation/vm/numa> for more. 4851da177e4SLinus Torvalds 4863f22ab27SDave Hansensource "mm/Kconfig" 4873f22ab27SDave Hansen 4881da177e4SLinus Torvaldsconfig LEDS 4891da177e4SLinus Torvalds bool "Timer and CPU usage LEDs" 4901da177e4SLinus Torvalds depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \ 4911da177e4SLinus Torvalds ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \ 4921da177e4SLinus Torvalds ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \ 4931da177e4SLinus Torvalds ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \ 49473a59c1cSSAN People ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \ 49573a59c1cSSAN People ARCH_AT91RM9200 4961da177e4SLinus Torvalds help 4971da177e4SLinus Torvalds If you say Y here, the LEDs on your machine will be used 4981da177e4SLinus Torvalds to provide useful information about your current system status. 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds If you are compiling a kernel for a NetWinder or EBSA-285, you will 5011da177e4SLinus Torvalds be able to select which LEDs are active using the options below. If 5021da177e4SLinus Torvalds you are compiling a kernel for the EBSA-110 or the LART however, the 5031da177e4SLinus Torvalds red LED will simply flash regularly to indicate that the system is 5041da177e4SLinus Torvalds still functional. It is safe to say Y here if you have a CATS 5051da177e4SLinus Torvalds system, but the driver will do nothing. 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvaldsconfig LEDS_TIMER 5081da177e4SLinus Torvalds bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \ 5091da177e4SLinus Torvalds MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 5101da177e4SLinus Torvalds depends on LEDS 5111da177e4SLinus Torvalds default y if ARCH_EBSA110 5121da177e4SLinus Torvalds help 5131da177e4SLinus Torvalds If you say Y here, one of the system LEDs (the green one on the 5141da177e4SLinus Torvalds NetWinder, the amber one on the EBSA285, or the red one on the LART) 5151da177e4SLinus Torvalds will flash regularly to indicate that the system is still 5161da177e4SLinus Torvalds operational. This is mainly useful to kernel hackers who are 5171da177e4SLinus Torvalds debugging unstable kernels. 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds The LART uses the same LED for both Timer LED and CPU usage LED 5201da177e4SLinus Torvalds functions. You may choose to use both, but the Timer LED function 5211da177e4SLinus Torvalds will overrule the CPU usage LED. 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvaldsconfig LEDS_CPU 5241da177e4SLinus Torvalds bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \ 5251da177e4SLinus Torvalds !ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 5261da177e4SLinus Torvalds depends on LEDS 5271da177e4SLinus Torvalds help 5281da177e4SLinus Torvalds If you say Y here, the red LED will be used to give a good real 5291da177e4SLinus Torvalds time indication of CPU usage, by lighting whenever the idle task 5301da177e4SLinus Torvalds is not currently executing. 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds The LART uses the same LED for both Timer LED and CPU usage LED 5331da177e4SLinus Torvalds functions. You may choose to use both, but the Timer LED function 5341da177e4SLinus Torvalds will overrule the CPU usage LED. 5351da177e4SLinus Torvalds 5361da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP 5371da177e4SLinus Torvalds bool 5381da177e4SLinus Torvalds default y if !ARCH_EBSA110 5391da177e4SLinus Torvalds help 5401da177e4SLinus Torvalds ARM processors can not fetch/store information which is not 5411da177e4SLinus Torvalds naturally aligned on the bus, i.e., a 4 byte fetch must start at an 5421da177e4SLinus Torvalds address divisible by 4. On 32-bit ARM processors, these non-aligned 5431da177e4SLinus Torvalds fetch/store instructions will be emulated in software if you say 5441da177e4SLinus Torvalds here, which has a severe performance impact. This is necessary for 5451da177e4SLinus Torvalds correct operation of some network protocols. With an IP-only 5461da177e4SLinus Torvalds configuration it is safe to say N, otherwise say Y. 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvaldsendmenu 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvaldsmenu "Boot options" 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds# Compressed boot loader in ROM. Yes, we really want to ask about 5531da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files. 5541da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT 5551da177e4SLinus Torvalds hex "Compressed ROM boot loader base address" 5561da177e4SLinus Torvalds default "0" 5571da177e4SLinus Torvalds help 5581da177e4SLinus Torvalds The physical address at which the ROM-able zImage is to be 5591da177e4SLinus Torvalds placed in the target. Platforms which normally make use of 5601da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 5611da177e4SLinus Torvalds value in their defconfig file. 5621da177e4SLinus Torvalds 5631da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS 5661da177e4SLinus Torvalds hex "Compressed ROM boot loader BSS address" 5671da177e4SLinus Torvalds default "0" 5681da177e4SLinus Torvalds help 5691da177e4SLinus Torvalds The base address of 64KiB of read/write memory in the target 5701da177e4SLinus Torvalds for the ROM-able zImage, which must be available while the 5711da177e4SLinus Torvalds decompressor is running. Platforms which normally make use of 5721da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 5731da177e4SLinus Torvalds value in their defconfig file. 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvaldsconfig ZBOOT_ROM 5781da177e4SLinus Torvalds bool "Compressed boot loader in ROM/flash" 5791da177e4SLinus Torvalds depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 5801da177e4SLinus Torvalds help 5811da177e4SLinus Torvalds Say Y here if you intend to execute your compressed kernel image 5821da177e4SLinus Torvalds (zImage) directly from ROM or flash. If unsure, say N. 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvaldsconfig CMDLINE 5851da177e4SLinus Torvalds string "Default kernel command string" 5861da177e4SLinus Torvalds default "" 5871da177e4SLinus Torvalds help 5881da177e4SLinus Torvalds On some architectures (EBSA110 and CATS), there is currently no way 5891da177e4SLinus Torvalds for the boot loader to pass arguments to the kernel. For these 5901da177e4SLinus Torvalds architectures, you should supply some command-line options at build 5911da177e4SLinus Torvalds time by entering them here. As a minimum, you should specify the 5921da177e4SLinus Torvalds memory size and the root device (e.g., mem=64M root=/dev/nfs). 5931da177e4SLinus Torvalds 5941da177e4SLinus Torvaldsconfig XIP_KERNEL 5951da177e4SLinus Torvalds bool "Kernel Execute-In-Place from ROM" 5961da177e4SLinus Torvalds depends on !ZBOOT_ROM 5971da177e4SLinus Torvalds help 5981da177e4SLinus Torvalds Execute-In-Place allows the kernel to run from non-volatile storage 5991da177e4SLinus Torvalds directly addressable by the CPU, such as NOR flash. This saves RAM 6001da177e4SLinus Torvalds space since the text section of the kernel is not loaded from flash 6011da177e4SLinus Torvalds to RAM. Read-write sections, such as the data section and stack, 6021da177e4SLinus Torvalds are still copied to RAM. The XIP kernel is not compressed since 6031da177e4SLinus Torvalds it has to run directly from flash, so it will take more space to 6041da177e4SLinus Torvalds store it. The flash address used to link the kernel object files, 6051da177e4SLinus Torvalds and for storing it, is configuration dependent. Therefore, if you 6061da177e4SLinus Torvalds say Y here, you must know the proper physical address where to 6071da177e4SLinus Torvalds store the kernel image depending on your own flash memory usage. 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds Also note that the make target becomes "make xipImage" rather than 6101da177e4SLinus Torvalds "make zImage" or "make Image". The final kernel binary to put in 6111da177e4SLinus Torvalds ROM memory will be arch/arm/boot/xipImage. 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds If unsure, say N. 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR 6161da177e4SLinus Torvalds hex "XIP Kernel Physical Location" 6171da177e4SLinus Torvalds depends on XIP_KERNEL 6181da177e4SLinus Torvalds default "0x00080000" 6191da177e4SLinus Torvalds help 6201da177e4SLinus Torvalds This is the physical address in your flash memory the kernel will 6211da177e4SLinus Torvalds be linked for and stored to. This address is dependent on your 6221da177e4SLinus Torvalds own flash usage. 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvaldsendmenu 6251da177e4SLinus Torvalds 626ec6bced6STony Lindgrenif (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1) 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvaldsmenu "CPU Frequency scaling" 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig" 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvaldsconfig CPU_FREQ_SA1100 6331da177e4SLinus Torvalds bool 63407c6d48fSVincent Sanders depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT) 6351da177e4SLinus Torvalds default y 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvaldsconfig CPU_FREQ_SA1110 6381da177e4SLinus Torvalds bool 6391da177e4SLinus Torvalds depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3) 6401da177e4SLinus Torvalds default y 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvaldsconfig CPU_FREQ_INTEGRATOR 6431da177e4SLinus Torvalds tristate "CPUfreq driver for ARM Integrator CPUs" 6441da177e4SLinus Torvalds depends on ARCH_INTEGRATOR && CPU_FREQ 6451da177e4SLinus Torvalds default y 6461da177e4SLinus Torvalds help 6471da177e4SLinus Torvalds This enables the CPUfreq driver for ARM Integrator CPUs. 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds For details, take a look at <file:Documentation/cpu-freq>. 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds If in doubt, say Y. 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvaldsendmenu 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvaldsendif 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvaldsmenu "Floating point emulation" 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvaldscomment "At least one emulation must be selected" 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvaldsconfig FPE_NWFPE 6621da177e4SLinus Torvalds bool "NWFPE math emulation" 6638993a44cSNicolas Pitre depends on !AEABI || OABI_COMPAT 6641da177e4SLinus Torvalds ---help--- 6651da177e4SLinus Torvalds Say Y to include the NWFPE floating point emulator in the kernel. 6661da177e4SLinus Torvalds This is necessary to run most binaries. Linux does not currently 6671da177e4SLinus Torvalds support floating point hardware so you need to say Y here even if 6681da177e4SLinus Torvalds your machine has an FPA or floating point co-processor podule. 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds You may say N here if you are going to load the Acorn FPEmulator 6711da177e4SLinus Torvalds early in the bootup. 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvaldsconfig FPE_NWFPE_XP 6741da177e4SLinus Torvalds bool "Support extended precision" 675bedf142bSLennert Buytenhek depends on FPE_NWFPE 6761da177e4SLinus Torvalds help 6771da177e4SLinus Torvalds Say Y to include 80-bit support in the kernel floating-point 6781da177e4SLinus Torvalds emulator. Otherwise, only 32 and 64-bit support is compiled in. 6791da177e4SLinus Torvalds Note that gcc does not generate 80-bit operations by default, 6801da177e4SLinus Torvalds so in most cases this option only enlarges the size of the 6811da177e4SLinus Torvalds floating point emulator without any good reason. 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds You almost surely want to say N here. 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvaldsconfig FPE_FASTFPE 6861da177e4SLinus Torvalds bool "FastFPE math emulation (EXPERIMENTAL)" 6878993a44cSNicolas Pitre depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL 6881da177e4SLinus Torvalds ---help--- 6891da177e4SLinus Torvalds Say Y here to include the FAST floating point emulator in the kernel. 6901da177e4SLinus Torvalds This is an experimental much faster emulator which now also has full 6911da177e4SLinus Torvalds precision for the mantissa. It does not support any exceptions. 6921da177e4SLinus Torvalds It is very simple, and approximately 3-6 times faster than NWFPE. 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds It should be sufficient for most programs. It may be not suitable 6951da177e4SLinus Torvalds for scientific calculations, but you have to check this for yourself. 6961da177e4SLinus Torvalds If you do not feel you need a faster FP emulation you should better 6971da177e4SLinus Torvalds choose NWFPE. 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvaldsconfig VFP 7001da177e4SLinus Torvalds bool "VFP-format floating point maths" 7011da177e4SLinus Torvalds depends on CPU_V6 || CPU_ARM926T 7021da177e4SLinus Torvalds help 7031da177e4SLinus Torvalds Say Y to include VFP support code in the kernel. This is needed 7041da177e4SLinus Torvalds if your hardware includes a VFP unit. 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds Please see <file:Documentation/arm/VFP/release-notes.txt> for 7071da177e4SLinus Torvalds release notes and additional status information. 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds Say N if your target does not have VFP hardware. 7101da177e4SLinus Torvalds 7111da177e4SLinus Torvaldsendmenu 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvaldsmenu "Userspace binary formats" 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvaldssource "fs/Kconfig.binfmt" 7161da177e4SLinus Torvalds 7171da177e4SLinus Torvaldsconfig ARTHUR 7181da177e4SLinus Torvalds tristate "RISC OS personality" 719704bdda0SNicolas Pitre depends on !AEABI 7201da177e4SLinus Torvalds help 7211da177e4SLinus Torvalds Say Y here to include the kernel code necessary if you want to run 7221da177e4SLinus Torvalds Acorn RISC OS/Arthur binaries under Linux. This code is still very 7231da177e4SLinus Torvalds experimental; if this sounds frightening, say N and sleep in peace. 7241da177e4SLinus Torvalds You can also say M here to compile this support as a module (which 7251da177e4SLinus Torvalds will be called arthur). 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvaldsendmenu 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvaldsmenu "Power management options" 7301da177e4SLinus Torvalds 731eceab4acSRussell Kingsource "kernel/power/Kconfig" 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvaldsconfig APM 7341da177e4SLinus Torvalds tristate "Advanced Power Management Emulation" 7351da177e4SLinus Torvalds ---help--- 7361da177e4SLinus Torvalds APM is a BIOS specification for saving power using several different 7371da177e4SLinus Torvalds techniques. This is mostly useful for battery powered laptops with 7381da177e4SLinus Torvalds APM compliant BIOSes. If you say Y here, the system time will be 7391da177e4SLinus Torvalds reset after a RESUME operation, the /proc/apm device will provide 7401da177e4SLinus Torvalds battery status information, and user-space programs will receive 7411da177e4SLinus Torvalds notification of APM "events" (e.g. battery status change). 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds In order to use APM, you will need supporting software. For location 7441da177e4SLinus Torvalds and more information, read <file:Documentation/pm.txt> and the 7451da177e4SLinus Torvalds Battery Powered Linux mini-HOWTO, available from 7461da177e4SLinus Torvalds <http://www.tldp.org/docs.html#howto>. 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds This driver does not spin down disk drives (see the hdparm(8) 7491da177e4SLinus Torvalds manpage ("man 8 hdparm") for that), and it doesn't turn off 7501da177e4SLinus Torvalds VESA-compliant "green" monitors. 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds Generally, if you don't have a battery in your machine, there isn't 7531da177e4SLinus Torvalds much point in using this driver and you should say N. If you get 7541da177e4SLinus Torvalds random kernel OOPSes or reboots that don't seem to be related to 7551da177e4SLinus Torvalds anything, try disabling/enabling this option (or disabling/enabling 7561da177e4SLinus Torvalds APM in your BIOS). 7571da177e4SLinus Torvalds 7581da177e4SLinus Torvaldsendmenu 7591da177e4SLinus Torvalds 760d5950b43SSam Ravnborgsource "net/Kconfig" 761d5950b43SSam Ravnborg 7621da177e4SLinus Torvaldsmenu "Device Drivers" 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvaldssource "drivers/base/Kconfig" 7651da177e4SLinus Torvalds 766c35bf4a5SPavel Macheksource "drivers/connector/Kconfig" 767c35bf4a5SPavel Machek 7681da177e4SLinus Torvaldsif ALIGNMENT_TRAP 7691da177e4SLinus Torvaldssource "drivers/mtd/Kconfig" 7701da177e4SLinus Torvaldsendif 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvaldssource "drivers/parport/Kconfig" 7731da177e4SLinus Torvalds 7741da177e4SLinus Torvaldssource "drivers/pnp/Kconfig" 7751da177e4SLinus Torvalds 7761da177e4SLinus Torvaldssource "drivers/block/Kconfig" 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvaldssource "drivers/acorn/block/Kconfig" 7791da177e4SLinus Torvalds 780bb011b8eSDavid Brownellif PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \ 781bb011b8eSDavid Brownell || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \ 782d56c524aSRussell King || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE 7831da177e4SLinus Torvaldssource "drivers/ide/Kconfig" 7841da177e4SLinus Torvaldsendif 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvaldssource "drivers/scsi/Kconfig" 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvaldssource "drivers/md/Kconfig" 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvaldssource "drivers/message/fusion/Kconfig" 7911da177e4SLinus Torvalds 7921da177e4SLinus Torvaldssource "drivers/ieee1394/Kconfig" 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvaldssource "drivers/message/i2o/Kconfig" 7951da177e4SLinus Torvalds 796d5950b43SSam Ravnborgsource "drivers/net/Kconfig" 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvaldssource "drivers/isdn/Kconfig" 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds# input before char - char/joystick depends on it. As does USB. 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvaldssource "drivers/input/Kconfig" 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvaldssource "drivers/char/Kconfig" 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvaldssource "drivers/i2c/Kconfig" 8071da177e4SLinus Torvalds 8088ae12a0dSDavid Brownellsource "drivers/spi/Kconfig" 8098ae12a0dSDavid Brownell 81004916c0eSAlessandro Zummosource "drivers/w1/Kconfig" 81104916c0eSAlessandro Zummo 812ad2f931dSJean Delvaresource "drivers/hwmon/Kconfig" 813ad2f931dSJean Delvare 8141da177e4SLinus Torvalds#source "drivers/l3/Kconfig" 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvaldssource "drivers/misc/Kconfig" 8171da177e4SLinus Torvalds 818a4e137abSRussell Kingsource "drivers/mfd/Kconfig" 819a4e137abSRussell King 8201da177e4SLinus Torvaldssource "drivers/media/Kconfig" 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvaldssource "drivers/video/Kconfig" 8231da177e4SLinus Torvalds 8241da177e4SLinus Torvaldssource "sound/Kconfig" 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvaldssource "drivers/usb/Kconfig" 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvaldssource "drivers/mmc/Kconfig" 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvaldsendmenu 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvaldssource "fs/Kconfig" 8331da177e4SLinus Torvalds 8341da177e4SLinus Torvaldssource "arch/arm/oprofile/Kconfig" 8351da177e4SLinus Torvalds 8361da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug" 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvaldssource "security/Kconfig" 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvaldssource "crypto/Kconfig" 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvaldssource "lib/Kconfig" 843