xref: /linux/arch/arm/Kconfig (revision c760fc1997e8156ebc4134c42c18f68137c689f9)
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