xref: /linux/arch/arm/Kconfig (revision 12b824fb15a37cdcdfa3e92c9e912a07cc6f7a24)
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
11*12b824fbSAlessandro Zummo	select RTC_LIB
121da177e4SLinus Torvalds	help
131da177e4SLinus Torvalds	  The ARM series is a line of low-power-consumption RISC chip designs
14f6c8965aSMartin Michlmayr	  licensed by ARM Ltd and targeted at embedded applications and
151da177e4SLinus Torvalds	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
161da177e4SLinus Torvalds	  manufactured, but legacy ARM-based PC hardware remains popular in
171da177e4SLinus Torvalds	  Europe.  There is an ARM Linux project with a web page at
181da177e4SLinus Torvalds	  <http://www.arm.linux.org.uk/>.
191da177e4SLinus Torvalds
201da177e4SLinus Torvaldsconfig MMU
211da177e4SLinus Torvalds	bool
221da177e4SLinus Torvalds	default y
231da177e4SLinus Torvalds
241da177e4SLinus Torvaldsconfig EISA
251da177e4SLinus Torvalds	bool
261da177e4SLinus Torvalds	---help---
271da177e4SLinus Torvalds	  The Extended Industry Standard Architecture (EISA) bus was
281da177e4SLinus Torvalds	  developed as an open alternative to the IBM MicroChannel bus.
291da177e4SLinus Torvalds
301da177e4SLinus Torvalds	  The EISA bus provided some of the features of the IBM MicroChannel
311da177e4SLinus Torvalds	  bus while maintaining backward compatibility with cards made for
321da177e4SLinus Torvalds	  the older ISA bus.  The EISA bus saw limited use between 1988 and
331da177e4SLinus Torvalds	  1995 when it was made obsolete by the PCI bus.
341da177e4SLinus Torvalds
351da177e4SLinus Torvalds	  Say Y here if you are building a kernel for an EISA-based machine.
361da177e4SLinus Torvalds
371da177e4SLinus Torvalds	  Otherwise, say N.
381da177e4SLinus Torvalds
391da177e4SLinus Torvaldsconfig SBUS
401da177e4SLinus Torvalds	bool
411da177e4SLinus Torvalds
421da177e4SLinus Torvaldsconfig MCA
431da177e4SLinus Torvalds	bool
441da177e4SLinus Torvalds	help
451da177e4SLinus Torvalds	  MicroChannel Architecture is found in some IBM PS/2 machines and
461da177e4SLinus Torvalds	  laptops.  It is a bus system similar to PCI or ISA. See
471da177e4SLinus Torvalds	  <file:Documentation/mca.txt> (and especially the web page given
481da177e4SLinus Torvalds	  there) before attempting to build an MCA bus kernel.
491da177e4SLinus Torvalds
501da177e4SLinus Torvaldsconfig RWSEM_GENERIC_SPINLOCK
511da177e4SLinus Torvalds	bool
521da177e4SLinus Torvalds	default y
531da177e4SLinus Torvalds
541da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM
551da177e4SLinus Torvalds	bool
561da177e4SLinus Torvalds
57b89c3b16SAkinobu Mitaconfig GENERIC_HWEIGHT
58b89c3b16SAkinobu Mita	bool
59b89c3b16SAkinobu Mita	default y
60b89c3b16SAkinobu Mita
611da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY
621da177e4SLinus Torvalds	bool
631da177e4SLinus Torvalds	default y
641da177e4SLinus Torvalds
651da177e4SLinus Torvaldsconfig GENERIC_BUST_SPINLOCK
661da177e4SLinus Torvalds	bool
671da177e4SLinus Torvalds
68a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC
69a08b6b79Sviro@ZenIV.linux.org.uk	bool
70a08b6b79Sviro@ZenIV.linux.org.uk
711da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA
721da177e4SLinus Torvalds	bool
731da177e4SLinus Torvalds
741da177e4SLinus Torvaldsconfig FIQ
751da177e4SLinus Torvalds	bool
761da177e4SLinus Torvalds
77034d2f5aSAl Viroconfig ARCH_MTD_XIP
78034d2f5aSAl Viro	bool
79034d2f5aSAl Viro
801da177e4SLinus Torvaldssource "init/Kconfig"
811da177e4SLinus Torvalds
821da177e4SLinus Torvaldsmenu "System Type"
831da177e4SLinus Torvalds
841da177e4SLinus Torvaldschoice
851da177e4SLinus Torvalds	prompt "ARM system type"
866a0e2430SCatalin Marinas	default ARCH_VERSATILE
871da177e4SLinus Torvalds
881da177e4SLinus Torvaldsconfig ARCH_CLPS7500
891da177e4SLinus Torvalds	bool "Cirrus-CL-PS7500FE"
901da177e4SLinus Torvalds	select TIMER_ACORN
91f7e68bbfSRussell King	select ISA
92f999b8bdSMartin Michlmayr	help
93f999b8bdSMartin Michlmayr	  Support for the Cirrus Logic PS7500FE system-on-a-chip.
941da177e4SLinus Torvalds
951da177e4SLinus Torvaldsconfig ARCH_CLPS711X
961da177e4SLinus Torvalds	bool "CLPS711x/EP721x-based"
97f999b8bdSMartin Michlmayr	help
98f999b8bdSMartin Michlmayr	  Support for Cirrus Logic 711x/721x based boards.
991da177e4SLinus Torvalds
1001da177e4SLinus Torvaldsconfig ARCH_CO285
1011da177e4SLinus Torvalds	bool "Co-EBSA285"
1021da177e4SLinus Torvalds	select FOOTBRIDGE
1031da177e4SLinus Torvalds	select FOOTBRIDGE_ADDIN
104f999b8bdSMartin Michlmayr	help
105f999b8bdSMartin Michlmayr	  Support for Intel's EBSA285 companion chip.
1061da177e4SLinus Torvalds
1071da177e4SLinus Torvaldsconfig ARCH_EBSA110
1081da177e4SLinus Torvalds	bool "EBSA-110"
109f7e68bbfSRussell King	select ISA
1101da177e4SLinus Torvalds	help
1111da177e4SLinus Torvalds	  This is an evaluation board for the StrongARM processor available
112f6c8965aSMartin Michlmayr	  from Digital. It has limited hardware on-board, including an
1131da177e4SLinus Torvalds	  Ethernet interface, two PCMCIA sockets, two serial ports and a
1141da177e4SLinus Torvalds	  parallel port.
1151da177e4SLinus Torvalds
116e7736d47SLennert Buytenhekconfig ARCH_EP93XX
117e7736d47SLennert Buytenhek	bool "EP93xx-based"
118e7736d47SLennert Buytenhek	select ARM_AMBA
119e7736d47SLennert Buytenhek	select ARM_VIC
120e7736d47SLennert Buytenhek	help
121e7736d47SLennert Buytenhek	  This enables support for the Cirrus EP93xx series of CPUs.
122e7736d47SLennert Buytenhek
1231da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE
1241da177e4SLinus Torvalds	bool "FootBridge"
1251da177e4SLinus Torvalds	select FOOTBRIDGE
126f999b8bdSMartin Michlmayr	help
127f999b8bdSMartin Michlmayr	  Support for systems based on the DC21285 companion chip
128f999b8bdSMartin Michlmayr	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
1291da177e4SLinus Torvalds
1301da177e4SLinus Torvaldsconfig ARCH_INTEGRATOR
1311da177e4SLinus Torvalds	bool "Integrator"
1321da177e4SLinus Torvalds	select ARM_AMBA
1331da177e4SLinus Torvalds	select ICST525
134f999b8bdSMartin Michlmayr	help
135f999b8bdSMartin Michlmayr	  Support for ARM's Integrator platform.
1361da177e4SLinus Torvalds
1371da177e4SLinus Torvaldsconfig ARCH_IOP3XX
1381da177e4SLinus Torvalds	bool "IOP3xx-based"
139f7e68bbfSRussell King	select PCI
140f999b8bdSMartin Michlmayr	help
141f999b8bdSMartin Michlmayr	  Support for Intel's IOP3XX (XScale) family of processors.
1421da177e4SLinus Torvalds
1431da177e4SLinus Torvaldsconfig ARCH_IXP4XX
1441da177e4SLinus Torvalds	bool "IXP4xx-based"
1451da177e4SLinus Torvalds	select DMABOUNCE
146f7e68bbfSRussell King	select PCI
147f999b8bdSMartin Michlmayr	help
148f999b8bdSMartin Michlmayr	  Support for Intel's IXP4XX (XScale) family of processors.
1491da177e4SLinus Torvalds
1501da177e4SLinus Torvaldsconfig ARCH_IXP2000
1511da177e4SLinus Torvalds	bool "IXP2400/2800-based"
152f7e68bbfSRussell King	select PCI
153f999b8bdSMartin Michlmayr	help
154f999b8bdSMartin Michlmayr	  Support for Intel's IXP2400/2800 (XScale) family of processors.
1551da177e4SLinus Torvalds
1561da177e4SLinus Torvaldsconfig ARCH_L7200
1571da177e4SLinus Torvalds	bool "LinkUp-L7200"
1581da177e4SLinus Torvalds	select FIQ
1591da177e4SLinus Torvalds	help
1601da177e4SLinus Torvalds	  Say Y here if you intend to run this kernel on a LinkUp Systems
1611da177e4SLinus Torvalds	  L7200 Software Development Board which uses an ARM720T processor.
1621da177e4SLinus Torvalds	  Information on this board can be obtained at:
1631da177e4SLinus Torvalds
1641da177e4SLinus Torvalds	  <http://www.linkupsys.com/>
1651da177e4SLinus Torvalds
1661da177e4SLinus Torvalds	  If you have any questions or comments about the Linux kernel port
1671da177e4SLinus Torvalds	  to this board, send e-mail to <sjhill@cotw.com>.
1681da177e4SLinus Torvalds
1691da177e4SLinus Torvaldsconfig ARCH_PXA
1701da177e4SLinus Torvalds	bool "PXA2xx-based"
171034d2f5aSAl Viro	select ARCH_MTD_XIP
172f999b8bdSMartin Michlmayr	help
173f999b8bdSMartin Michlmayr	  Support for Intel's PXA2XX processor line.
1741da177e4SLinus Torvalds
1751da177e4SLinus Torvaldsconfig ARCH_RPC
1761da177e4SLinus Torvalds	bool "RiscPC"
1771da177e4SLinus Torvalds	select ARCH_ACORN
1781da177e4SLinus Torvalds	select FIQ
1791da177e4SLinus Torvalds	select TIMER_ACORN
180a08b6b79Sviro@ZenIV.linux.org.uk	select ARCH_MAY_HAVE_PC_FDC
181065909b9SRussell King	select ISA_DMA_API
1821da177e4SLinus Torvalds	help
1831da177e4SLinus Torvalds	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
1841da177e4SLinus Torvalds	  CD-ROM interface, serial and parallel port, and the floppy drive.
1851da177e4SLinus Torvalds
1861da177e4SLinus Torvaldsconfig ARCH_SA1100
1871da177e4SLinus Torvalds	bool "SA1100-based"
188f7e68bbfSRussell King	select ISA
1893cd9e19eSRussell King	select ARCH_DISCONTIGMEM_ENABLE
190034d2f5aSAl Viro	select ARCH_MTD_XIP
191f999b8bdSMartin Michlmayr	help
192f999b8bdSMartin Michlmayr	  Support for StrongARM 11x0 based boards.
1931da177e4SLinus Torvalds
1941da177e4SLinus Torvaldsconfig ARCH_S3C2410
1951da177e4SLinus Torvalds	bool "Samsung S3C2410"
1961da177e4SLinus Torvalds	help
1971da177e4SLinus Torvalds	  Samsung S3C2410X CPU based systems, such as the Simtec Electronics
1981da177e4SLinus Torvalds	  BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
199f6c8965aSMartin Michlmayr	  the Samsung SMDK2410 development board (and derivatives).
2001da177e4SLinus Torvalds
2011da177e4SLinus Torvaldsconfig ARCH_SHARK
2021da177e4SLinus Torvalds	bool "Shark"
203f7e68bbfSRussell King	select ISA
204f7e68bbfSRussell King	select ISA_DMA
205f7e68bbfSRussell King	select PCI
206f999b8bdSMartin Michlmayr	help
207f999b8bdSMartin Michlmayr	  Support for the StrongARM based Digital DNARD machine, also known
208f999b8bdSMartin Michlmayr	  as "Shark" (<http://www.shark-linux.de/shark.html>).
2091da177e4SLinus Torvalds
2101da177e4SLinus Torvaldsconfig ARCH_LH7A40X
2111da177e4SLinus Torvalds	bool "Sharp LH7A40X"
2121da177e4SLinus Torvalds	help
2131da177e4SLinus Torvalds	  Say Y here for systems based on one of the Sharp LH7A40X
2141da177e4SLinus Torvalds	  System on a Chip processors.  These CPUs include an ARM922T
2151da177e4SLinus Torvalds	  core with a wide array of integrated devices for
2161da177e4SLinus Torvalds	  hand-held and low-power applications.
2171da177e4SLinus Torvalds
2181da177e4SLinus Torvaldsconfig ARCH_OMAP
2191da177e4SLinus Torvalds	bool "TI OMAP"
220f999b8bdSMartin Michlmayr	help
221f999b8bdSMartin Michlmayr	  Support for TI's OMAP platform (OMAP1 and OMAP2).
2221da177e4SLinus Torvalds
2231da177e4SLinus Torvaldsconfig ARCH_VERSATILE
2241da177e4SLinus Torvalds	bool "Versatile"
2251da177e4SLinus Torvalds	select ARM_AMBA
226fa0fe48fSRussell King	select ARM_VIC
2271da177e4SLinus Torvalds	select ICST307
2281da177e4SLinus Torvalds	help
2291da177e4SLinus Torvalds	  This enables support for ARM Ltd Versatile board.
2301da177e4SLinus Torvalds
2318ad68bbfSCatalin Marinasconfig ARCH_REALVIEW
2328ad68bbfSCatalin Marinas	bool "RealView"
2338ad68bbfSCatalin Marinas	select ARM_AMBA
2348ad68bbfSCatalin Marinas	select ICST307
2358ad68bbfSCatalin Marinas	help
2368ad68bbfSCatalin Marinas	  This enables support for ARM Ltd RealView boards.
2378ad68bbfSCatalin Marinas
2381da177e4SLinus Torvaldsconfig ARCH_IMX
2391da177e4SLinus Torvalds	bool "IMX"
240f999b8bdSMartin Michlmayr	help
241f999b8bdSMartin Michlmayr	  Support for Motorola's i.MX family of processors (MX1, MXL).
2421da177e4SLinus Torvalds
2431da177e4SLinus Torvaldsconfig ARCH_H720X
2441da177e4SLinus Torvalds	bool "Hynix-HMS720x-based"
245065909b9SRussell King	select ISA_DMA_API
2461da177e4SLinus Torvalds	help
2471da177e4SLinus Torvalds	  This enables support for systems based on the Hynix HMS720x
2481da177e4SLinus Torvalds
249038c5b60SBellido Nicolasconfig ARCH_AAEC2000
250038c5b60SBellido Nicolas	bool "Agilent AAEC-2000 based"
251049eb329SBellido Nicolas	select ARM_AMBA
252038c5b60SBellido Nicolas	help
253038c5b60SBellido Nicolas	  This enables support for systems based on the Agilent AAEC-2000
254038c5b60SBellido Nicolas
25573a59c1cSSAN Peopleconfig ARCH_AT91RM9200
25673a59c1cSSAN People	bool "AT91RM9200"
25773a59c1cSSAN People	help
258f999b8bdSMartin Michlmayr	  Say Y here if you intend to run this kernel on an Atmel
259f999b8bdSMartin Michlmayr	  AT91RM9200-based board.
26073a59c1cSSAN People
2611da177e4SLinus Torvaldsendchoice
2621da177e4SLinus Torvalds
2631da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig"
2641da177e4SLinus Torvalds
265e7736d47SLennert Buytenheksource "arch/arm/mach-ep93xx/Kconfig"
266e7736d47SLennert Buytenhek
2671da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig"
2681da177e4SLinus Torvalds
2691da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig"
2701da177e4SLinus Torvalds
2711da177e4SLinus Torvaldssource "arch/arm/mach-iop3xx/Kconfig"
2721da177e4SLinus Torvalds
2731da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig"
2741da177e4SLinus Torvalds
2751da177e4SLinus Torvaldssource "arch/arm/mach-ixp2000/Kconfig"
2761da177e4SLinus Torvalds
2771da177e4SLinus Torvaldssource "arch/arm/mach-pxa/Kconfig"
2781da177e4SLinus Torvalds
2791da177e4SLinus Torvaldssource "arch/arm/mach-sa1100/Kconfig"
2801da177e4SLinus Torvalds
281d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig"
282d48af15eSTony Lindgren
283d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig"
2841da177e4SLinus Torvalds
2851dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig"
2861dbae815STony Lindgren
2871da177e4SLinus Torvaldssource "arch/arm/mach-s3c2410/Kconfig"
2881da177e4SLinus Torvalds
2891da177e4SLinus Torvaldssource "arch/arm/mach-lh7a40x/Kconfig"
2901da177e4SLinus Torvalds
2911da177e4SLinus Torvaldssource "arch/arm/mach-imx/Kconfig"
2921da177e4SLinus Torvalds
2931da177e4SLinus Torvaldssource "arch/arm/mach-h720x/Kconfig"
2941da177e4SLinus Torvalds
2951da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig"
2961da177e4SLinus Torvalds
297038c5b60SBellido Nicolassource "arch/arm/mach-aaec2000/Kconfig"
298038c5b60SBellido Nicolas
2998ad68bbfSCatalin Marinassource "arch/arm/mach-realview/Kconfig"
3008ad68bbfSCatalin Marinas
30173a59c1cSSAN Peoplesource "arch/arm/mach-at91rm9200/Kconfig"
30273a59c1cSSAN People
3031da177e4SLinus Torvalds# Definitions to make life easier
3041da177e4SLinus Torvaldsconfig ARCH_ACORN
3051da177e4SLinus Torvalds	bool
3061da177e4SLinus Torvalds
3071da177e4SLinus Torvaldssource arch/arm/mm/Kconfig
3081da177e4SLinus Torvalds
3091da177e4SLinus Torvalds#  bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
3101da177e4SLinus Torvaldsconfig XSCALE_PMU
3111da177e4SLinus Torvalds	bool
3121da177e4SLinus Torvalds	depends on CPU_XSCALE && !XSCALE_PMU_TIMER
3131da177e4SLinus Torvalds	default y
3141da177e4SLinus Torvalds
3151da177e4SLinus Torvaldsendmenu
3161da177e4SLinus Torvalds
3171da177e4SLinus Torvaldssource "arch/arm/common/Kconfig"
3181da177e4SLinus Torvalds
3191da177e4SLinus Torvaldsconfig FORCE_MAX_ZONEORDER
3201da177e4SLinus Torvalds	int
3211da177e4SLinus Torvalds	depends on SA1111
3221da177e4SLinus Torvalds	default "9"
3231da177e4SLinus Torvalds
3241da177e4SLinus Torvaldsmenu "Bus support"
3251da177e4SLinus Torvalds
3261da177e4SLinus Torvaldsconfig ARM_AMBA
3271da177e4SLinus Torvalds	bool
3281da177e4SLinus Torvalds
3291da177e4SLinus Torvaldsconfig ISA
3301da177e4SLinus Torvalds	bool
3311da177e4SLinus Torvalds	help
3321da177e4SLinus Torvalds	  Find out whether you have ISA slots on your motherboard.  ISA is the
3331da177e4SLinus Torvalds	  name of a bus system, i.e. the way the CPU talks to the other stuff
3341da177e4SLinus Torvalds	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
3351da177e4SLinus Torvalds	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
3361da177e4SLinus Torvalds	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
3371da177e4SLinus Torvalds
338065909b9SRussell King# Select ISA DMA controller support
3391da177e4SLinus Torvaldsconfig ISA_DMA
3401da177e4SLinus Torvalds	bool
341065909b9SRussell King	select ISA_DMA_API
3421da177e4SLinus Torvalds
343065909b9SRussell King# Select ISA DMA interface
3445cae841bSAl Viroconfig ISA_DMA_API
3455cae841bSAl Viro	bool
3465cae841bSAl Viro
3471da177e4SLinus Torvaldsconfig PCI
348c0da085aSCatalin Marinas	bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB
3491da177e4SLinus Torvalds	help
3501da177e4SLinus Torvalds	  Find out whether you have a PCI motherboard. PCI is the name of a
3511da177e4SLinus Torvalds	  bus system, i.e. the way the CPU talks to the other stuff inside
3521da177e4SLinus Torvalds	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
3531da177e4SLinus Torvalds	  VESA. If you have PCI, say Y, otherwise N.
3541da177e4SLinus Torvalds
3551da177e4SLinus Torvalds	  The PCI-HOWTO, available from
3561da177e4SLinus Torvalds	  <http://www.tldp.org/docs.html#howto>, contains valuable
3571da177e4SLinus Torvalds	  information about which PCI hardware does work under Linux and which
3581da177e4SLinus Torvalds	  doesn't.
3591da177e4SLinus Torvalds
3601da177e4SLinus Torvalds# Select the host bridge type
3611da177e4SLinus Torvaldsconfig PCI_HOST_VIA82C505
3621da177e4SLinus Torvalds	bool
3631da177e4SLinus Torvalds	depends on PCI && ARCH_SHARK
3641da177e4SLinus Torvalds	default y
3651da177e4SLinus Torvalds
3661da177e4SLinus Torvaldssource "drivers/pci/Kconfig"
3671da177e4SLinus Torvalds
3681da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig"
3691da177e4SLinus Torvalds
3701da177e4SLinus Torvaldsendmenu
3711da177e4SLinus Torvalds
3721da177e4SLinus Torvaldsmenu "Kernel Features"
3731da177e4SLinus Torvalds
3741da177e4SLinus Torvaldsconfig SMP
3751da177e4SLinus Torvalds	bool "Symmetric Multi-Processing (EXPERIMENTAL)"
376f6db449cSRussell King	depends on EXPERIMENTAL && REALVIEW_MPCORE
3771da177e4SLinus Torvalds	help
3781da177e4SLinus Torvalds	  This enables support for systems with more than one CPU. If you have
3791da177e4SLinus Torvalds	  a system with only one CPU, like most personal computers, say N. If
3801da177e4SLinus Torvalds	  you have a system with more than one CPU, say Y.
3811da177e4SLinus Torvalds
3821da177e4SLinus Torvalds	  If you say N here, the kernel will run on single and multiprocessor
3831da177e4SLinus Torvalds	  machines, but will use only one CPU of a multiprocessor machine. If
3841da177e4SLinus Torvalds	  you say Y here, the kernel will run on many, but not all, single
3851da177e4SLinus Torvalds	  processor machines. On a single processor machine, the kernel will
3861da177e4SLinus Torvalds	  run faster if you say N here.
3871da177e4SLinus Torvalds
38812c62c2eSArthur Othieno	  See also the <file:Documentation/smp.txt>,
38912c62c2eSArthur Othieno	  <file:Documentation/i386/IO-APIC.txt>,
3901da177e4SLinus Torvalds	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
3911da177e4SLinus Torvalds	  <http://www.linuxdoc.org/docs.html#howto>.
3921da177e4SLinus Torvalds
3931da177e4SLinus Torvalds	  If you don't know what to do here, say N.
3941da177e4SLinus Torvalds
3951da177e4SLinus Torvaldsconfig NR_CPUS
3961da177e4SLinus Torvalds	int "Maximum number of CPUs (2-32)"
3971da177e4SLinus Torvalds	range 2 32
3981da177e4SLinus Torvalds	depends on SMP
3991da177e4SLinus Torvalds	default "4"
4001da177e4SLinus Torvalds
401a054a811SRussell Kingconfig HOTPLUG_CPU
402a054a811SRussell King	bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
403a054a811SRussell King	depends on SMP && HOTPLUG && EXPERIMENTAL
404a054a811SRussell King	help
405a054a811SRussell King	  Say Y here to experiment with turning CPUs off and on.  CPUs
406a054a811SRussell King	  can be controlled through /sys/devices/system/cpu.
407a054a811SRussell King
40837ee16aeSRussell Kingconfig LOCAL_TIMERS
40937ee16aeSRussell King	bool "Use local timer interrupts"
4102a98beb6SRussell King	depends on SMP && REALVIEW_MPCORE
41137ee16aeSRussell King	default y
41237ee16aeSRussell King	help
41337ee16aeSRussell King	  Enable support for local timers on SMP platforms, rather then the
41437ee16aeSRussell King	  legacy IPI broadcast method.  Local timers allows the system
41537ee16aeSRussell King	  accounting to be spread across the timer interval, preventing a
41637ee16aeSRussell King	  "thundering herd" at every timer tick.
41737ee16aeSRussell King
4181da177e4SLinus Torvaldsconfig PREEMPT
4191da177e4SLinus Torvalds	bool "Preemptible Kernel (EXPERIMENTAL)"
4201da177e4SLinus Torvalds	depends on EXPERIMENTAL
4211da177e4SLinus Torvalds	help
4221da177e4SLinus Torvalds	  This option reduces the latency of the kernel when reacting to
4231da177e4SLinus Torvalds	  real-time or interactive events by allowing a low priority process to
4241da177e4SLinus Torvalds	  be preempted even if it is in kernel mode executing a system call.
4251da177e4SLinus Torvalds	  This allows applications to run more reliably even when the system is
4261da177e4SLinus Torvalds	  under load.
4271da177e4SLinus Torvalds
4281da177e4SLinus Torvalds	  Say Y here if you are building a kernel for a desktop, embedded
4291da177e4SLinus Torvalds	  or real-time system.  Say N if you are unsure.
4301da177e4SLinus Torvalds
4318749af68SRussell Kingconfig NO_IDLE_HZ
4328749af68SRussell King	bool "Dynamic tick timer"
4338749af68SRussell King	help
4348749af68SRussell King	  Select this option if you want to disable continuous timer ticks
4358749af68SRussell King	  and have them programmed to occur as required. This option saves
4368749af68SRussell King	  power as the system can remain in idle state for longer.
4378749af68SRussell King
4388749af68SRussell King	  By default dynamic tick is disabled during the boot, and can be
4398749af68SRussell King	  manually enabled with:
4408749af68SRussell King
4418749af68SRussell King	    echo 1 > /sys/devices/system/timer/timer0/dyn_tick
4428749af68SRussell King
4438749af68SRussell King	  Alternatively, if you want dynamic tick automatically enabled
4448749af68SRussell King	  during boot, pass "dyntick=enable" via the kernel command string.
4458749af68SRussell King
446f2be64b3STony Lindgren	  Please note that dynamic tick may affect the accuracy of
447f2be64b3STony Lindgren	  timekeeping on some platforms depending on the implementation.
448569d2c34SNicolas Pitre	  Currently at least OMAP, PXA2xx and SA11x0 platforms are known
449569d2c34SNicolas Pitre	  to have accurate timekeeping with dynamic tick.
450f2be64b3STony Lindgren
451f8065813SRussell Kingconfig HZ
452f8065813SRussell King	int
453f8065813SRussell King	default 128 if ARCH_L7200
454f8065813SRussell King	default 200 if ARCH_EBSA110 || ARCH_S3C2410
455bfe65704SRussell King	default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
456f8065813SRussell King	default 100
457f8065813SRussell King
458704bdda0SNicolas Pitreconfig AEABI
459704bdda0SNicolas Pitre	bool "Use the ARM EABI to compile the kernel"
460704bdda0SNicolas Pitre	help
461704bdda0SNicolas Pitre	  This option allows for the kernel to be compiled using the latest
462704bdda0SNicolas Pitre	  ARM ABI (aka EABI).  This is only useful if you are using a user
463704bdda0SNicolas Pitre	  space environment that is also compiled with EABI.
464704bdda0SNicolas Pitre
465704bdda0SNicolas Pitre	  Since there are major incompatibilities between the legacy ABI and
466704bdda0SNicolas Pitre	  EABI, especially with regard to structure member alignment, this
467704bdda0SNicolas Pitre	  option also changes the kernel syscall calling convention to
468704bdda0SNicolas Pitre	  disambiguate both ABIs and allow for backward compatibility support
469704bdda0SNicolas Pitre	  (selected with CONFIG_OABI_COMPAT).
470704bdda0SNicolas Pitre
471704bdda0SNicolas Pitre	  To use this you need GCC version 4.0.0 or later.
472704bdda0SNicolas Pitre
4736c90c872SNicolas Pitreconfig OABI_COMPAT
474a73a3ff1SRussell King	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
47561c484d4SNicolas Pitre	depends on AEABI && EXPERIMENTAL
4766c90c872SNicolas Pitre	default y
4776c90c872SNicolas Pitre	help
4786c90c872SNicolas Pitre	  This option preserves the old syscall interface along with the
4796c90c872SNicolas Pitre	  new (ARM EABI) one. It also provides a compatibility layer to
4806c90c872SNicolas Pitre	  intercept syscalls that have structure arguments which layout
4816c90c872SNicolas Pitre	  in memory differs between the legacy ABI and the new ARM EABI
4826c90c872SNicolas Pitre	  (only for non "thumb" binaries). This option adds a tiny
4836c90c872SNicolas Pitre	  overhead to all syscalls and produces a slightly larger kernel.
4846c90c872SNicolas Pitre	  If you know you'll be using only pure EABI user space then you
4856c90c872SNicolas Pitre	  can say N here. If this option is not selected and you attempt
4866c90c872SNicolas Pitre	  to execute a legacy ABI binary then the result will be
4876c90c872SNicolas Pitre	  UNPREDICTABLE (in fact it can be predicted that it won't work
4886c90c872SNicolas Pitre	  at all). If in doubt say Y.
4896c90c872SNicolas Pitre
4903f22ab27SDave Hansenconfig ARCH_DISCONTIGMEM_ENABLE
4911da177e4SLinus Torvalds	bool
492f7e68bbfSRussell King	default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
4931da177e4SLinus Torvalds	help
4941da177e4SLinus Torvalds	  Say Y to support efficient handling of discontiguous physical memory,
4951da177e4SLinus Torvalds	  for architectures which are either NUMA (Non-Uniform Memory Access)
4961da177e4SLinus Torvalds	  or have huge holes in the physical address space for other reasons.
4971da177e4SLinus Torvalds	  See <file:Documentation/vm/numa> for more.
4981da177e4SLinus Torvalds
4993f22ab27SDave Hansensource "mm/Kconfig"
5003f22ab27SDave Hansen
5011da177e4SLinus Torvaldsconfig LEDS
5021da177e4SLinus Torvalds	bool "Timer and CPU usage LEDs"
5031da177e4SLinus Torvalds	depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
5041da177e4SLinus Torvalds		   ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
5051da177e4SLinus Torvalds		   ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
5061da177e4SLinus Torvalds		   ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
50773a59c1cSSAN People		   ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
50873a59c1cSSAN People		   ARCH_AT91RM9200
5091da177e4SLinus Torvalds	help
5101da177e4SLinus Torvalds	  If you say Y here, the LEDs on your machine will be used
5111da177e4SLinus Torvalds	  to provide useful information about your current system status.
5121da177e4SLinus Torvalds
5131da177e4SLinus Torvalds	  If you are compiling a kernel for a NetWinder or EBSA-285, you will
5141da177e4SLinus Torvalds	  be able to select which LEDs are active using the options below. If
5151da177e4SLinus Torvalds	  you are compiling a kernel for the EBSA-110 or the LART however, the
5161da177e4SLinus Torvalds	  red LED will simply flash regularly to indicate that the system is
5171da177e4SLinus Torvalds	  still functional. It is safe to say Y here if you have a CATS
5181da177e4SLinus Torvalds	  system, but the driver will do nothing.
5191da177e4SLinus Torvalds
5201da177e4SLinus Torvaldsconfig LEDS_TIMER
5211da177e4SLinus Torvalds	bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
5221da177e4SLinus Torvalds			    MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
5231da177e4SLinus Torvalds	depends on LEDS
5241da177e4SLinus Torvalds	default y if ARCH_EBSA110
5251da177e4SLinus Torvalds	help
5261da177e4SLinus Torvalds	  If you say Y here, one of the system LEDs (the green one on the
5271da177e4SLinus Torvalds	  NetWinder, the amber one on the EBSA285, or the red one on the LART)
5281da177e4SLinus Torvalds	  will flash regularly to indicate that the system is still
5291da177e4SLinus Torvalds	  operational. This is mainly useful to kernel hackers who are
5301da177e4SLinus Torvalds	  debugging unstable kernels.
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 LEDS_CPU
5371da177e4SLinus Torvalds	bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
5381da177e4SLinus Torvalds			!ARCH_OMAP) || MACH_OMAP_H2 || MACH_OMAP_PERSEUS2
5391da177e4SLinus Torvalds	depends on LEDS
5401da177e4SLinus Torvalds	help
5411da177e4SLinus Torvalds	  If you say Y here, the red LED will be used to give a good real
5421da177e4SLinus Torvalds	  time indication of CPU usage, by lighting whenever the idle task
5431da177e4SLinus Torvalds	  is not currently executing.
5441da177e4SLinus Torvalds
5451da177e4SLinus Torvalds	  The LART uses the same LED for both Timer LED and CPU usage LED
5461da177e4SLinus Torvalds	  functions. You may choose to use both, but the Timer LED function
5471da177e4SLinus Torvalds	  will overrule the CPU usage LED.
5481da177e4SLinus Torvalds
5491da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP
5501da177e4SLinus Torvalds	bool
5511da177e4SLinus Torvalds	default y if !ARCH_EBSA110
5521da177e4SLinus Torvalds	help
5531da177e4SLinus Torvalds	  ARM processors can not fetch/store information which is not
5541da177e4SLinus Torvalds	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
5551da177e4SLinus Torvalds	  address divisible by 4. On 32-bit ARM processors, these non-aligned
5561da177e4SLinus Torvalds	  fetch/store instructions will be emulated in software if you say
5571da177e4SLinus Torvalds	  here, which has a severe performance impact. This is necessary for
5581da177e4SLinus Torvalds	  correct operation of some network protocols. With an IP-only
5591da177e4SLinus Torvalds	  configuration it is safe to say N, otherwise say Y.
5601da177e4SLinus Torvalds
5611da177e4SLinus Torvaldsendmenu
5621da177e4SLinus Torvalds
5631da177e4SLinus Torvaldsmenu "Boot options"
5641da177e4SLinus Torvalds
5651da177e4SLinus Torvalds# Compressed boot loader in ROM.  Yes, we really want to ask about
5661da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files.
5671da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT
5681da177e4SLinus Torvalds	hex "Compressed ROM boot loader base address"
5691da177e4SLinus Torvalds	default "0"
5701da177e4SLinus Torvalds	help
5711da177e4SLinus Torvalds	  The physical address at which the ROM-able zImage is to be
5721da177e4SLinus Torvalds	  placed in the target.  Platforms which normally make use of
5731da177e4SLinus Torvalds	  ROM-able zImage formats normally set this to a suitable
5741da177e4SLinus Torvalds	  value in their defconfig file.
5751da177e4SLinus Torvalds
5761da177e4SLinus Torvalds	  If ZBOOT_ROM is not enabled, this has no effect.
5771da177e4SLinus Torvalds
5781da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS
5791da177e4SLinus Torvalds	hex "Compressed ROM boot loader BSS address"
5801da177e4SLinus Torvalds	default "0"
5811da177e4SLinus Torvalds	help
5821da177e4SLinus Torvalds	  The base address of 64KiB of read/write memory in the target
5831da177e4SLinus Torvalds	  for the ROM-able zImage, which must be available while the
5841da177e4SLinus Torvalds	  decompressor is running.  Platforms which normally make use of
5851da177e4SLinus Torvalds	  ROM-able zImage formats normally set this to a suitable
5861da177e4SLinus Torvalds	  value in their defconfig file.
5871da177e4SLinus Torvalds
5881da177e4SLinus Torvalds	  If ZBOOT_ROM is not enabled, this has no effect.
5891da177e4SLinus Torvalds
5901da177e4SLinus Torvaldsconfig ZBOOT_ROM
5911da177e4SLinus Torvalds	bool "Compressed boot loader in ROM/flash"
5921da177e4SLinus Torvalds	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
5931da177e4SLinus Torvalds	help
5941da177e4SLinus Torvalds	  Say Y here if you intend to execute your compressed kernel image
5951da177e4SLinus Torvalds	  (zImage) directly from ROM or flash.  If unsure, say N.
5961da177e4SLinus Torvalds
5971da177e4SLinus Torvaldsconfig CMDLINE
5981da177e4SLinus Torvalds	string "Default kernel command string"
5991da177e4SLinus Torvalds	default ""
6001da177e4SLinus Torvalds	help
6011da177e4SLinus Torvalds	  On some architectures (EBSA110 and CATS), there is currently no way
6021da177e4SLinus Torvalds	  for the boot loader to pass arguments to the kernel. For these
6031da177e4SLinus Torvalds	  architectures, you should supply some command-line options at build
6041da177e4SLinus Torvalds	  time by entering them here. As a minimum, you should specify the
6051da177e4SLinus Torvalds	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
6061da177e4SLinus Torvalds
6071da177e4SLinus Torvaldsconfig XIP_KERNEL
6081da177e4SLinus Torvalds	bool "Kernel Execute-In-Place from ROM"
6091da177e4SLinus Torvalds	depends on !ZBOOT_ROM
6101da177e4SLinus Torvalds	help
6111da177e4SLinus Torvalds	  Execute-In-Place allows the kernel to run from non-volatile storage
6121da177e4SLinus Torvalds	  directly addressable by the CPU, such as NOR flash. This saves RAM
6131da177e4SLinus Torvalds	  space since the text section of the kernel is not loaded from flash
6141da177e4SLinus Torvalds	  to RAM.  Read-write sections, such as the data section and stack,
6151da177e4SLinus Torvalds	  are still copied to RAM.  The XIP kernel is not compressed since
6161da177e4SLinus Torvalds	  it has to run directly from flash, so it will take more space to
6171da177e4SLinus Torvalds	  store it.  The flash address used to link the kernel object files,
6181da177e4SLinus Torvalds	  and for storing it, is configuration dependent. Therefore, if you
6191da177e4SLinus Torvalds	  say Y here, you must know the proper physical address where to
6201da177e4SLinus Torvalds	  store the kernel image depending on your own flash memory usage.
6211da177e4SLinus Torvalds
6221da177e4SLinus Torvalds	  Also note that the make target becomes "make xipImage" rather than
6231da177e4SLinus Torvalds	  "make zImage" or "make Image".  The final kernel binary to put in
6241da177e4SLinus Torvalds	  ROM memory will be arch/arm/boot/xipImage.
6251da177e4SLinus Torvalds
6261da177e4SLinus Torvalds	  If unsure, say N.
6271da177e4SLinus Torvalds
6281da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR
6291da177e4SLinus Torvalds	hex "XIP Kernel Physical Location"
6301da177e4SLinus Torvalds	depends on XIP_KERNEL
6311da177e4SLinus Torvalds	default "0x00080000"
6321da177e4SLinus Torvalds	help
6331da177e4SLinus Torvalds	  This is the physical address in your flash memory the kernel will
6341da177e4SLinus Torvalds	  be linked for and stored to.  This address is dependent on your
6351da177e4SLinus Torvalds	  own flash usage.
6361da177e4SLinus Torvalds
6371da177e4SLinus Torvaldsendmenu
6381da177e4SLinus Torvalds
639ec6bced6STony Lindgrenif (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP1)
6401da177e4SLinus Torvalds
6411da177e4SLinus Torvaldsmenu "CPU Frequency scaling"
6421da177e4SLinus Torvalds
6431da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig"
6441da177e4SLinus Torvalds
6451da177e4SLinus Torvaldsconfig CPU_FREQ_SA1100
6461da177e4SLinus Torvalds	bool
64707c6d48fSVincent Sanders	depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
6481da177e4SLinus Torvalds	default y
6491da177e4SLinus Torvalds
6501da177e4SLinus Torvaldsconfig CPU_FREQ_SA1110
6511da177e4SLinus Torvalds	bool
6521da177e4SLinus Torvalds	depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
6531da177e4SLinus Torvalds	default y
6541da177e4SLinus Torvalds
6551da177e4SLinus Torvaldsconfig CPU_FREQ_INTEGRATOR
6561da177e4SLinus Torvalds	tristate "CPUfreq driver for ARM Integrator CPUs"
6571da177e4SLinus Torvalds	depends on ARCH_INTEGRATOR && CPU_FREQ
6581da177e4SLinus Torvalds	default y
6591da177e4SLinus Torvalds	help
6601da177e4SLinus Torvalds	  This enables the CPUfreq driver for ARM Integrator CPUs.
6611da177e4SLinus Torvalds
6621da177e4SLinus Torvalds	  For details, take a look at <file:Documentation/cpu-freq>.
6631da177e4SLinus Torvalds
6641da177e4SLinus Torvalds	  If in doubt, say Y.
6651da177e4SLinus Torvalds
6661da177e4SLinus Torvaldsendmenu
6671da177e4SLinus Torvalds
6681da177e4SLinus Torvaldsendif
6691da177e4SLinus Torvalds
6701da177e4SLinus Torvaldsmenu "Floating point emulation"
6711da177e4SLinus Torvalds
6721da177e4SLinus Torvaldscomment "At least one emulation must be selected"
6731da177e4SLinus Torvalds
6741da177e4SLinus Torvaldsconfig FPE_NWFPE
6751da177e4SLinus Torvalds	bool "NWFPE math emulation"
6768993a44cSNicolas Pitre	depends on !AEABI || OABI_COMPAT
6771da177e4SLinus Torvalds	---help---
6781da177e4SLinus Torvalds	  Say Y to include the NWFPE floating point emulator in the kernel.
6791da177e4SLinus Torvalds	  This is necessary to run most binaries. Linux does not currently
6801da177e4SLinus Torvalds	  support floating point hardware so you need to say Y here even if
6811da177e4SLinus Torvalds	  your machine has an FPA or floating point co-processor podule.
6821da177e4SLinus Torvalds
6831da177e4SLinus Torvalds	  You may say N here if you are going to load the Acorn FPEmulator
6841da177e4SLinus Torvalds	  early in the bootup.
6851da177e4SLinus Torvalds
6861da177e4SLinus Torvaldsconfig FPE_NWFPE_XP
6871da177e4SLinus Torvalds	bool "Support extended precision"
688bedf142bSLennert Buytenhek	depends on FPE_NWFPE
6891da177e4SLinus Torvalds	help
6901da177e4SLinus Torvalds	  Say Y to include 80-bit support in the kernel floating-point
6911da177e4SLinus Torvalds	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
6921da177e4SLinus Torvalds	  Note that gcc does not generate 80-bit operations by default,
6931da177e4SLinus Torvalds	  so in most cases this option only enlarges the size of the
6941da177e4SLinus Torvalds	  floating point emulator without any good reason.
6951da177e4SLinus Torvalds
6961da177e4SLinus Torvalds	  You almost surely want to say N here.
6971da177e4SLinus Torvalds
6981da177e4SLinus Torvaldsconfig FPE_FASTFPE
6991da177e4SLinus Torvalds	bool "FastFPE math emulation (EXPERIMENTAL)"
7008993a44cSNicolas Pitre	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
7011da177e4SLinus Torvalds	---help---
7021da177e4SLinus Torvalds	  Say Y here to include the FAST floating point emulator in the kernel.
7031da177e4SLinus Torvalds	  This is an experimental much faster emulator which now also has full
7041da177e4SLinus Torvalds	  precision for the mantissa.  It does not support any exceptions.
7051da177e4SLinus Torvalds	  It is very simple, and approximately 3-6 times faster than NWFPE.
7061da177e4SLinus Torvalds
7071da177e4SLinus Torvalds	  It should be sufficient for most programs.  It may be not suitable
7081da177e4SLinus Torvalds	  for scientific calculations, but you have to check this for yourself.
7091da177e4SLinus Torvalds	  If you do not feel you need a faster FP emulation you should better
7101da177e4SLinus Torvalds	  choose NWFPE.
7111da177e4SLinus Torvalds
7121da177e4SLinus Torvaldsconfig VFP
7131da177e4SLinus Torvalds	bool "VFP-format floating point maths"
7141da177e4SLinus Torvalds	depends on CPU_V6 || CPU_ARM926T
7151da177e4SLinus Torvalds	help
7161da177e4SLinus Torvalds	  Say Y to include VFP support code in the kernel. This is needed
7171da177e4SLinus Torvalds	  if your hardware includes a VFP unit.
7181da177e4SLinus Torvalds
7191da177e4SLinus Torvalds	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
7201da177e4SLinus Torvalds	  release notes and additional status information.
7211da177e4SLinus Torvalds
7221da177e4SLinus Torvalds	  Say N if your target does not have VFP hardware.
7231da177e4SLinus Torvalds
7241da177e4SLinus Torvaldsendmenu
7251da177e4SLinus Torvalds
7261da177e4SLinus Torvaldsmenu "Userspace binary formats"
7271da177e4SLinus Torvalds
7281da177e4SLinus Torvaldssource "fs/Kconfig.binfmt"
7291da177e4SLinus Torvalds
7301da177e4SLinus Torvaldsconfig ARTHUR
7311da177e4SLinus Torvalds	tristate "RISC OS personality"
732704bdda0SNicolas Pitre	depends on !AEABI
7331da177e4SLinus Torvalds	help
7341da177e4SLinus Torvalds	  Say Y here to include the kernel code necessary if you want to run
7351da177e4SLinus Torvalds	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
7361da177e4SLinus Torvalds	  experimental; if this sounds frightening, say N and sleep in peace.
7371da177e4SLinus Torvalds	  You can also say M here to compile this support as a module (which
7381da177e4SLinus Torvalds	  will be called arthur).
7391da177e4SLinus Torvalds
7401da177e4SLinus Torvaldsendmenu
7411da177e4SLinus Torvalds
7421da177e4SLinus Torvaldsmenu "Power management options"
7431da177e4SLinus Torvalds
744eceab4acSRussell Kingsource "kernel/power/Kconfig"
7451da177e4SLinus Torvalds
7461da177e4SLinus Torvaldsconfig APM
7471da177e4SLinus Torvalds	tristate "Advanced Power Management Emulation"
7481da177e4SLinus Torvalds	---help---
7491da177e4SLinus Torvalds	  APM is a BIOS specification for saving power using several different
7501da177e4SLinus Torvalds	  techniques. This is mostly useful for battery powered laptops with
7511da177e4SLinus Torvalds	  APM compliant BIOSes. If you say Y here, the system time will be
7521da177e4SLinus Torvalds	  reset after a RESUME operation, the /proc/apm device will provide
7531da177e4SLinus Torvalds	  battery status information, and user-space programs will receive
7541da177e4SLinus Torvalds	  notification of APM "events" (e.g. battery status change).
7551da177e4SLinus Torvalds
7561da177e4SLinus Torvalds	  In order to use APM, you will need supporting software. For location
7571da177e4SLinus Torvalds	  and more information, read <file:Documentation/pm.txt> and the
7581da177e4SLinus Torvalds	  Battery Powered Linux mini-HOWTO, available from
7591da177e4SLinus Torvalds	  <http://www.tldp.org/docs.html#howto>.
7601da177e4SLinus Torvalds
7611da177e4SLinus Torvalds	  This driver does not spin down disk drives (see the hdparm(8)
7621da177e4SLinus Torvalds	  manpage ("man 8 hdparm") for that), and it doesn't turn off
7631da177e4SLinus Torvalds	  VESA-compliant "green" monitors.
7641da177e4SLinus Torvalds
7651da177e4SLinus Torvalds	  Generally, if you don't have a battery in your machine, there isn't
7661da177e4SLinus Torvalds	  much point in using this driver and you should say N. If you get
7671da177e4SLinus Torvalds	  random kernel OOPSes or reboots that don't seem to be related to
7681da177e4SLinus Torvalds	  anything, try disabling/enabling this option (or disabling/enabling
7691da177e4SLinus Torvalds	  APM in your BIOS).
7701da177e4SLinus Torvalds
7711da177e4SLinus Torvaldsendmenu
7721da177e4SLinus Torvalds
773d5950b43SSam Ravnborgsource "net/Kconfig"
774d5950b43SSam Ravnborg
7751da177e4SLinus Torvaldsmenu "Device Drivers"
7761da177e4SLinus Torvalds
7771da177e4SLinus Torvaldssource "drivers/base/Kconfig"
7781da177e4SLinus Torvalds
779c35bf4a5SPavel Macheksource "drivers/connector/Kconfig"
780c35bf4a5SPavel Machek
7811da177e4SLinus Torvaldsif ALIGNMENT_TRAP
7821da177e4SLinus Torvaldssource "drivers/mtd/Kconfig"
7831da177e4SLinus Torvaldsendif
7841da177e4SLinus Torvalds
7851da177e4SLinus Torvaldssource "drivers/parport/Kconfig"
7861da177e4SLinus Torvalds
7871da177e4SLinus Torvaldssource "drivers/pnp/Kconfig"
7881da177e4SLinus Torvalds
7891da177e4SLinus Torvaldssource "drivers/block/Kconfig"
7901da177e4SLinus Torvalds
7911da177e4SLinus Torvaldssource "drivers/acorn/block/Kconfig"
7921da177e4SLinus Torvalds
793bb011b8eSDavid Brownellif PCMCIA || ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX \
794bb011b8eSDavid Brownell	|| ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC \
795d56c524aSRussell King	|| ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE
7961da177e4SLinus Torvaldssource "drivers/ide/Kconfig"
7971da177e4SLinus Torvaldsendif
7981da177e4SLinus Torvalds
7991da177e4SLinus Torvaldssource "drivers/scsi/Kconfig"
8001da177e4SLinus Torvalds
8011da177e4SLinus Torvaldssource "drivers/md/Kconfig"
8021da177e4SLinus Torvalds
8031da177e4SLinus Torvaldssource "drivers/message/fusion/Kconfig"
8041da177e4SLinus Torvalds
8051da177e4SLinus Torvaldssource "drivers/ieee1394/Kconfig"
8061da177e4SLinus Torvalds
8071da177e4SLinus Torvaldssource "drivers/message/i2o/Kconfig"
8081da177e4SLinus Torvalds
809d5950b43SSam Ravnborgsource "drivers/net/Kconfig"
8101da177e4SLinus Torvalds
8111da177e4SLinus Torvaldssource "drivers/isdn/Kconfig"
8121da177e4SLinus Torvalds
8131da177e4SLinus Torvalds# input before char - char/joystick depends on it. As does USB.
8141da177e4SLinus Torvalds
8151da177e4SLinus Torvaldssource "drivers/input/Kconfig"
8161da177e4SLinus Torvalds
8171da177e4SLinus Torvaldssource "drivers/char/Kconfig"
8181da177e4SLinus Torvalds
8191da177e4SLinus Torvaldssource "drivers/i2c/Kconfig"
8201da177e4SLinus Torvalds
8218ae12a0dSDavid Brownellsource "drivers/spi/Kconfig"
8228ae12a0dSDavid Brownell
82304916c0eSAlessandro Zummosource "drivers/w1/Kconfig"
82404916c0eSAlessandro Zummo
825ad2f931dSJean Delvaresource "drivers/hwmon/Kconfig"
826ad2f931dSJean Delvare
8271da177e4SLinus Torvalds#source "drivers/l3/Kconfig"
8281da177e4SLinus Torvalds
8291da177e4SLinus Torvaldssource "drivers/misc/Kconfig"
8301da177e4SLinus Torvalds
831a4e137abSRussell Kingsource "drivers/mfd/Kconfig"
832a4e137abSRussell King
8331da177e4SLinus Torvaldssource "drivers/media/Kconfig"
8341da177e4SLinus Torvalds
8351da177e4SLinus Torvaldssource "drivers/video/Kconfig"
8361da177e4SLinus Torvalds
8371da177e4SLinus Torvaldssource "sound/Kconfig"
8381da177e4SLinus Torvalds
8391da177e4SLinus Torvaldssource "drivers/usb/Kconfig"
8401da177e4SLinus Torvalds
8411da177e4SLinus Torvaldssource "drivers/mmc/Kconfig"
8421da177e4SLinus Torvalds
843*12b824fbSAlessandro Zummosource "drivers/rtc/Kconfig"
844*12b824fbSAlessandro Zummo
8451da177e4SLinus Torvaldsendmenu
8461da177e4SLinus Torvalds
8471da177e4SLinus Torvaldssource "fs/Kconfig"
8481da177e4SLinus Torvalds
8491da177e4SLinus Torvaldssource "arch/arm/oprofile/Kconfig"
8501da177e4SLinus Torvalds
8511da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug"
8521da177e4SLinus Torvalds
8531da177e4SLinus Torvaldssource "security/Kconfig"
8541da177e4SLinus Torvalds
8551da177e4SLinus Torvaldssource "crypto/Kconfig"
8561da177e4SLinus Torvalds
8571da177e4SLinus Torvaldssource "lib/Kconfig"
858