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Kconfig
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#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#
mainmenu "Linux Kernel Configuration"
config ARM
bool
default y
select RTC_LIB
select SYS_SUPPORTS_APM_EMULATION
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and
handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
manufactured, but legacy ARM-based PC hardware remains popular in
Europe. There is an ARM Linux project with a web page at
<http://www.arm.linux.org.uk/>.
config SYS_SUPPORTS_APM_EMULATION
bool
config GENERIC_GPIO
bool
default n
config GENERIC_TIME
bool
default n
config GENERIC_CLOCKEVENTS
bool
default n
config MMU
bool
default y
config NO_IOPORT
bool
default n
config EISA
bool
---help---
The Extended Industry Standard Architecture (EISA) bus was
developed as an open alternative to the IBM MicroChannel bus.
The EISA bus provided some of the features of the IBM MicroChannel
bus while maintaining backward compatibility with cards made for
the older ISA bus. The EISA bus saw limited use between 1988 and
1995 when it was made obsolete by the PCI bus.
Say Y here if you are building a kernel for an EISA-based machine.
Otherwise, say N.
config SBUS
bool
config MCA
bool
help
MicroChannel Architecture is found in some IBM PS/2 machines and
laptops. It is a bus system similar to PCI or ISA. See
<file:Documentation/mca.txt> (and especially the web page given
there) before attempting to build an MCA bus kernel.
config GENERIC_HARDIRQS
bool
default y
config STACKTRACE_SUPPORT
bool
default y
config LOCKDEP_SUPPORT
bool
default y
config TRACE_IRQFLAGS_SUPPORT
bool
default y
config HARDIRQS_SW_RESEND
bool
default y
config GENERIC_IRQ_PROBE
bool
default y
config RWSEM_GENERIC_SPINLOCK
bool
default y
config RWSEM_XCHGADD_ALGORITHM
bool
config ARCH_HAS_ILOG2_U32
bool
default n
config ARCH_HAS_ILOG2_U64
bool
default n
config GENERIC_HWEIGHT
bool
default y
config GENERIC_CALIBRATE_DELAY
bool
default y
config ARCH_MAY_HAVE_PC_FDC
bool
config ZONE_DMA
bool
default y
config GENERIC_ISA_DMA
bool
config FIQ
bool
config ARCH_MTD_XIP
bool
config VECTORS_BASE
hex
default 0xffff0000 if MMU || CPU_HIGH_VECTOR
default DRAM_BASE if REMAP_VECTORS_TO_RAM
default 0x00000000
help
The base address of exception vectors.
source "init/Kconfig"
menu "System Type"
choice
prompt "ARM system type"
default ARCH_VERSATILE
config ARCH_AAEC2000
bool "Agilent AAEC-2000 based"
select ARM_AMBA
help
This enables support for systems based on the Agilent AAEC-2000
config ARCH_INTEGRATOR
bool "ARM Ltd. Integrator family"
select ARM_AMBA
select ICST525
help
Support for ARM's Integrator platform.
config ARCH_REALVIEW
bool "ARM Ltd. RealView family"
select ARM_AMBA
select ICST307
help
This enables support for ARM Ltd RealView boards.
config ARCH_VERSATILE
bool "ARM Ltd. Versatile family"
select ARM_AMBA
select ARM_VIC
select ICST307
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
help
This enables support for ARM Ltd Versatile board.
config ARCH_AT91
bool "Atmel AT91"
select GENERIC_GPIO
help
This enables support for systems based on the Atmel AT91RM9200
and AT91SAM9xxx processors.
config ARCH_CLPS7500
bool "Cirrus CL-PS7500FE"
select TIMER_ACORN
select ISA
select NO_IOPORT
help
Support for the Cirrus Logic PS7500FE system-on-a-chip.
config ARCH_CLPS711X
bool "Cirrus Logic CLPS711x/EP721x-based"
help
Support for Cirrus Logic 711x/721x based boards.
config ARCH_CO285
bool "Co-EBSA285"
select FOOTBRIDGE
select FOOTBRIDGE_ADDIN
help
Support for Intel's EBSA285 companion chip.
config ARCH_EBSA110
bool "EBSA-110"
select ISA
select NO_IOPORT
help
This is an evaluation board for the StrongARM processor available
from Digital. It has limited hardware on-board, including an
Ethernet interface, two PCMCIA sockets, two serial ports and a
parallel port.
config ARCH_EP93XX
bool "EP93xx-based"
select ARM_AMBA
select ARM_VIC
help
This enables support for the Cirrus EP93xx series of CPUs.
config ARCH_FOOTBRIDGE
bool "FootBridge"
select FOOTBRIDGE
help
Support for systems based on the DC21285 companion chip
("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
config ARCH_NETX
bool "Hilscher NetX based"
select ARM_VIC
help
This enables support for systems based on the Hilscher NetX Soc
config ARCH_H720X
bool "Hynix HMS720x-based"
select ISA_DMA_API
help
This enables support for systems based on the Hynix HMS720x
config ARCH_IMX
bool "IMX"
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
help
Support for Motorola's i.MX family of processors (MX1, MXL).
config ARCH_IOP13XX
bool "IOP13xx-based"
depends on MMU
select PLAT_IOP
select PCI
select ARCH_SUPPORTS_MSI
help
Support for Intel's IOP13XX (XScale) family of processors.
config ARCH_IOP32X
bool "IOP32x-based"
depends on MMU
select PLAT_IOP
select PCI
help
Support for Intel's 80219 and IOP32X (XScale) family of
processors.
config ARCH_IOP33X
bool "IOP33x-based"
depends on MMU
select PLAT_IOP
select PCI
help
Support for Intel's IOP33X (XScale) family of processors.
config ARCH_IXP23XX
bool "IXP23XX-based"
depends on MMU
select PCI
help
Support for Intel's IXP23xx (XScale) family of processors.
config ARCH_IXP2000
bool "IXP2400/2800-based"
depends on MMU
select PCI
help
Support for Intel's IXP2400/2800 (XScale) family of processors.
config ARCH_IXP4XX
bool "IXP4xx-based"
depends on MMU
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
help
Support for Intel's IXP4XX (XScale) family of processors.
config ARCH_L7200
bool "LinkUp-L7200"
select FIQ
help
Say Y here if you intend to run this kernel on a LinkUp Systems
L7200 Software Development Board which uses an ARM720T processor.
Information on this board can be obtained at:
<http://www.linkupsys.com/>
If you have any questions or comments about the Linux kernel port
to this board, send e-mail to <[email protected]>.
config ARCH_KS8695
bool "Micrel/Kendin KS8695"
select GENERIC_GPIO
help
Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
System-on-Chip devices.
config ARCH_NS9XXX
bool "NetSilicon NS9xxx"
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
help
Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
System.
<http://www.digi.com/products/microprocessors/index.jsp>
config ARCH_MXC
bool "Freescale MXC/iMX-based"
select ARCH_MTD_XIP
help
Support for Freescale MXC/iMX-based family of processors
config ARCH_PNX4008
bool "Philips Nexperia PNX4008 Mobile"
help
This enables support for Philips PNX4008 mobile platform.
config ARCH_PXA
bool "PXA2xx/PXA3xx-based"
depends on MMU
select ARCH_MTD_XIP
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
help
Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
config ARCH_RPC
bool "RiscPC"
select ARCH_ACORN
select FIQ
select TIMER_ACORN
select ARCH_MAY_HAVE_PC_FDC
select ISA_DMA_API
select NO_IOPORT
help
On the Acorn Risc-PC, Linux can support the internal IDE disk and
CD-ROM interface, serial and parallel port, and the floppy drive.
config ARCH_SA1100
bool "SA1100-based"
select ISA
select ARCH_DISCONTIGMEM_ENABLE
select ARCH_MTD_XIP
select GENERIC_GPIO
help
Support for StrongARM 11x0 based boards.
config ARCH_S3C2410
bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
select GENERIC_GPIO
help
Samsung S3C2410X CPU based systems, such as the Simtec Electronics
BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
the Samsung SMDK2410 development board (and derivatives).
config ARCH_SHARK
bool "Shark"
select ISA
select ISA_DMA
select PCI
help
Support for the StrongARM based Digital DNARD machine, also known
as "Shark" (<http://www.shark-linux.de/shark.html>).
config ARCH_LH7A40X
bool "Sharp LH7A40X"
help
Say Y here for systems based on one of the Sharp LH7A40X
System on a Chip processors. These CPUs include an ARM922T
core with a wide array of integrated devices for
hand-held and low-power applications.
config ARCH_DAVINCI
bool "TI DaVinci"
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
help
Support for TI's DaVinci platform.
config ARCH_OMAP
bool "TI OMAP"
select GENERIC_GPIO
select GENERIC_TIME
help
Support for TI's OMAP platform (OMAP1 and OMAP2).
endchoice
source "arch/arm/mach-clps711x/Kconfig"
source "arch/arm/mach-ep93xx/Kconfig"
source "arch/arm/mach-footbridge/Kconfig"
source "arch/arm/mach-integrator/Kconfig"
source "arch/arm/mach-iop32x/Kconfig"
source "arch/arm/mach-iop33x/Kconfig"
source "arch/arm/mach-iop13xx/Kconfig"
source "arch/arm/mach-ixp4xx/Kconfig"
source "arch/arm/mach-ixp2000/Kconfig"
source "arch/arm/mach-ixp23xx/Kconfig"
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/mach-sa1100/Kconfig"
source "arch/arm/plat-omap/Kconfig"
source "arch/arm/mach-omap1/Kconfig"
source "arch/arm/mach-omap2/Kconfig"
source "arch/arm/plat-s3c24xx/Kconfig"
source "arch/arm/plat-s3c/Kconfig"
if ARCH_S3C2410
source "arch/arm/mach-s3c2400/Kconfig"
source "arch/arm/mach-s3c2410/Kconfig"
source "arch/arm/mach-s3c2412/Kconfig"
source "arch/arm/mach-s3c2440/Kconfig"
source "arch/arm/mach-s3c2442/Kconfig"
source "arch/arm/mach-s3c2443/Kconfig"
endif
source "arch/arm/mach-lh7a40x/Kconfig"
source "arch/arm/mach-imx/Kconfig"
source "arch/arm/mach-h720x/Kconfig"
source "arch/arm/mach-versatile/Kconfig"
source "arch/arm/mach-aaec2000/Kconfig"
source "arch/arm/mach-realview/Kconfig"
source "arch/arm/mach-at91/Kconfig"
source "arch/arm/plat-mxc/Kconfig"
source "arch/arm/mach-netx/Kconfig"
source "arch/arm/mach-ns9xxx/Kconfig"
source "arch/arm/mach-davinci/Kconfig"
source "arch/arm/mach-ks8695/Kconfig"
# Definitions to make life easier
config ARCH_ACORN
bool
config PLAT_IOP
bool
source arch/arm/mm/Kconfig
config IWMMXT
bool "Enable iWMMXt support"
depends on CPU_XSCALE || CPU_XSC3
default y if PXA27x || PXA3xx
help
Enable support for iWMMXt context switching at run time if
running on a CPU that supports it.
# bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
config XSCALE_PMU
bool
depends on CPU_XSCALE && !XSCALE_PMU_TIMER
default y
if !MMU
source "arch/arm/Kconfig-nommu"
endif
endmenu
source "arch/arm/common/Kconfig"
config FORCE_MAX_ZONEORDER
int
depends on SA1111
default "9"
menu "Bus support"
config ARM_AMBA
bool
config ISA
bool
help
Find out whether you have ISA slots on your motherboard. ISA is the
name of a bus system, i.e. the way the CPU talks to the other stuff
inside your box. Other bus systems are PCI, EISA, MicroChannel
(MCA) or VESA. ISA is an older system, now being displaced by PCI;
newer boards don't support it. If you have ISA, say Y, otherwise N.
# Select ISA DMA controller support
config ISA_DMA
bool
select ISA_DMA_API
# Select ISA DMA interface
config ISA_DMA_API
bool
config PCI
bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695
help
Find out whether you have a PCI motherboard. PCI is the name of a
bus system, i.e. the way the CPU talks to the other stuff inside
your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
VESA. If you have PCI, say Y, otherwise N.
The PCI-HOWTO, available from
<http://www.tldp.org/docs.html#howto>, contains valuable
information about which PCI hardware does work under Linux and which
doesn't.
config PCI_SYSCALL
def_bool PCI
# Select the host bridge type
config PCI_HOST_VIA82C505
bool
depends on PCI && ARCH_SHARK
default y
source "drivers/pci/Kconfig"
source "drivers/pcmcia/Kconfig"
endmenu
menu "Kernel Features"
source "kernel/time/Kconfig"
config SMP
bool "Symmetric Multi-Processing (EXPERIMENTAL)"
depends on EXPERIMENTAL && REALVIEW_MPCORE
help
This enables support for systems with more than one CPU. If you have
a system with only one CPU, like most personal computers, say N. If
you have a system with more than one CPU, say Y.
If you say N here, the kernel will run on single and multiprocessor
machines, but will use only one CPU of a multiprocessor machine. If
you say Y here, the kernel will run on many, but not all, single
processor machines. On a single processor machine, the kernel will
run faster if you say N here.
See also the <file:Documentation/smp.txt>,
<file:Documentation/i386/IO-APIC.txt>,
<file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
<http://www.linuxdoc.org/docs.html#howto>.
If you don't know what to do here, say N.
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
depends on SMP
default "4"
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
depends on SMP && HOTPLUG && EXPERIMENTAL
help
Say Y here to experiment with turning CPUs off and on. CPUs
can be controlled through /sys/devices/system/cpu.
config LOCAL_TIMERS
bool "Use local timer interrupts"
depends on SMP && REALVIEW_MPCORE
default y
help
Enable support for local timers on SMP platforms, rather then the
legacy IPI broadcast method. Local timers allows the system
accounting to be spread across the timer interval, preventing a
"thundering herd" at every timer tick.
config PREEMPT
bool "Preemptible Kernel (EXPERIMENTAL)"
depends on EXPERIMENTAL
help
This option reduces the latency of the kernel when reacting to
real-time or interactive events by allowing a low priority process to
be preempted even if it is in kernel mode executing a system call.
This allows applications to run more reliably even when the system is
under load.
Say Y here if you are building a kernel for a desktop, embedded
or real-time system. Say N if you are unsure.
config NO_IDLE_HZ
bool "Dynamic tick timer"
depends on !GENERIC_CLOCKEVENTS
help
Select this option if you want to disable continuous timer ticks
and have them programmed to occur as required. This option saves
power as the system can remain in idle state for longer.
By default dynamic tick is disabled during the boot, and can be
manually enabled with:
echo 1 > /sys/devices/system/timer/timer0/dyn_tick
Alternatively, if you want dynamic tick automatically enabled
during boot, pass "dyntick=enable" via the kernel command string.
Please note that dynamic tick may affect the accuracy of
timekeeping on some platforms depending on the implementation.
Currently at least OMAP, PXA2xx and SA11x0 platforms are known
to have accurate timekeeping with dynamic tick.
config HZ
int
default 128 if ARCH_L7200
default 200 if ARCH_EBSA110 || ARCH_S3C2410
default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
default 100
config AEABI
bool "Use the ARM EABI to compile the kernel"
help
This option allows for the kernel to be compiled using the latest
ARM ABI (aka EABI). This is only useful if you are using a user
space environment that is also compiled with EABI.
Since there are major incompatibilities between the legacy ABI and
EABI, especially with regard to structure member alignment, this
option also changes the kernel syscall calling convention to
disambiguate both ABIs and allow for backward compatibility support
(selected with CONFIG_OABI_COMPAT).
To use this you need GCC version 4.0.0 or later.
config OABI_COMPAT
bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
depends on AEABI && EXPERIMENTAL
default y
help
This option preserves the old syscall interface along with the
new (ARM EABI) one. It also provides a compatibility layer to
intercept syscalls that have structure arguments which layout
in memory differs between the legacy ABI and the new ARM EABI
(only for non "thumb" binaries). This option adds a tiny
overhead to all syscalls and produces a slightly larger kernel.
If you know you'll be using only pure EABI user space then you
can say N here. If this option is not selected and you attempt
to execute a legacy ABI binary then the result will be
UNPREDICTABLE (in fact it can be predicted that it won't work
at all). If in doubt say Y.
config ARCH_DISCONTIGMEM_ENABLE
bool
default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
help
Say Y to support efficient handling of discontiguous physical memory,
for architectures which are either NUMA (Non-Uniform Memory Access)
or have huge holes in the physical address space for other reasons.
See <file:Documentation/vm/numa> for more.
config NODES_SHIFT
int
default "4" if ARCH_LH7A40X
default "2"
depends on NEED_MULTIPLE_NODES
source "mm/Kconfig"
config LEDS
bool "Timer and CPU usage LEDs"
depends on ARCH_CDB89712 || ARCH_CO285 || ARCH_EBSA110 || \
ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
ARCH_KS8695
help
If you say Y here, the LEDs on your machine will be used
to provide useful information about your current system status.
If you are compiling a kernel for a NetWinder or EBSA-285, you will
be able to select which LEDs are active using the options below. If
you are compiling a kernel for the EBSA-110 or the LART however, the
red LED will simply flash regularly to indicate that the system is
still functional. It is safe to say Y here if you have a CATS
system, but the driver will do nothing.
config LEDS_TIMER
bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
|| MACH_OMAP_PERSEUS2
depends on LEDS
depends on !GENERIC_CLOCKEVENTS
default y if ARCH_EBSA110
help
If you say Y here, one of the system LEDs (the green one on the
NetWinder, the amber one on the EBSA285, or the red one on the LART)
will flash regularly to indicate that the system is still
operational. This is mainly useful to kernel hackers who are
debugging unstable kernels.
The LART uses the same LED for both Timer LED and CPU usage LED
functions. You may choose to use both, but the Timer LED function
will overrule the CPU usage LED.
config LEDS_CPU
bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
!ARCH_OMAP) \
|| OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
|| MACH_OMAP_PERSEUS2
depends on LEDS
help
If you say Y here, the red LED will be used to give a good real
time indication of CPU usage, by lighting whenever the idle task
is not currently executing.
The LART uses the same LED for both Timer LED and CPU usage LED
functions. You may choose to use both, but the Timer LED function
will overrule the CPU usage LED.
config ALIGNMENT_TRAP
bool
depends on CPU_CP15_MMU
default y if !ARCH_EBSA110
help
ARM processors cannot fetch/store information which is not
naturally aligned on the bus, i.e., a 4 byte fetch must start at an
address divisible by 4. On 32-bit ARM processors, these non-aligned
fetch/store instructions will be emulated in software if you say
here, which has a severe performance impact. This is necessary for
correct operation of some network protocols. With an IP-only
configuration it is safe to say N, otherwise say Y.
endmenu
menu "Boot options"
# Compressed boot loader in ROM. Yes, we really want to ask about
# TEXT and BSS so we preserve their values in the config files.
config ZBOOT_ROM_TEXT
hex "Compressed ROM boot loader base address"
default "0"
help
The physical address at which the ROM-able zImage is to be
placed in the target. Platforms which normally make use of
ROM-able zImage formats normally set this to a suitable
value in their defconfig file.
If ZBOOT_ROM is not enabled, this has no effect.
config ZBOOT_ROM_BSS
hex "Compressed ROM boot loader BSS address"
default "0"
help
The base address of an area of read/write memory in the target
for the ROM-able zImage which must be available while the
decompressor is running. It must be large enough to hold the
entire decompressed kernel plus an additional 128 KiB.
Platforms which normally make use of ROM-able zImage formats
normally set this to a suitable value in their defconfig file.
If ZBOOT_ROM is not enabled, this has no effect.
config ZBOOT_ROM
bool "Compressed boot loader in ROM/flash"
depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
help
Say Y here if you intend to execute your compressed kernel image
(zImage) directly from ROM or flash. If unsure, say N.
config CMDLINE
string "Default kernel command string"
default ""
help
On some architectures (EBSA110 and CATS), there is currently no way
for the boot loader to pass arguments to the kernel. For these
architectures, you should supply some command-line options at build
time by entering them here. As a minimum, you should specify the
memory size and the root device (e.g., mem=64M root=/dev/nfs).
config XIP_KERNEL
bool "Kernel Execute-In-Place from ROM"
depends on !ZBOOT_ROM
help
Execute-In-Place allows the kernel to run from non-volatile storage
directly addressable by the CPU, such as NOR flash. This saves RAM
space since the text section of the kernel is not loaded from flash
to RAM. Read-write sections, such as the data section and stack,
are still copied to RAM. The XIP kernel is not compressed since
it has to run directly from flash, so it will take more space to
store it. The flash address used to link the kernel object files,
and for storing it, is configuration dependent. Therefore, if you
say Y here, you must know the proper physical address where to
store the kernel image depending on your own flash memory usage.
Also note that the make target becomes "make xipImage" rather than
"make zImage" or "make Image". The final kernel binary to put in
ROM memory will be arch/arm/boot/xipImage.
If unsure, say N.
config XIP_PHYS_ADDR
hex "XIP Kernel Physical Location"
depends on XIP_KERNEL
default "0x00080000"
help
This is the physical address in your flash memory the kernel will
be linked for and stored to. This address is dependent on your
own flash usage.
config KEXEC
bool "Kexec system call (EXPERIMENTAL)"
depends on EXPERIMENTAL
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot
but it is indepedent of the system firmware. And like a reboot
you can start any kernel with it, not just Linux.
It is an ongoing process to be certain the hardware in a machine
is properly shutdown, so do not be surprised if this code does not
initially work for you. It may help to enable device hotplugging
support.
endmenu
if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
menu "CPU Frequency scaling"
source "drivers/cpufreq/Kconfig"
config CPU_FREQ_SA1100
bool
depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_H3800 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
default y
config CPU_FREQ_SA1110
bool
depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
default y
config CPU_FREQ_INTEGRATOR
tristate "CPUfreq driver for ARM Integrator CPUs"
depends on ARCH_INTEGRATOR && CPU_FREQ
default y
help
This enables the CPUfreq driver for ARM Integrator CPUs.
For details, take a look at <file:Documentation/cpu-freq>.
If in doubt, say Y.
config CPU_FREQ_IMX
tristate "CPUfreq driver for i.MX CPUs"
depends on ARCH_IMX && CPU_FREQ
default n
help
This enables the CPUfreq driver for i.MX CPUs.
If in doubt, say N.
endmenu
endif
menu "Floating point emulation"
comment "At least one emulation must be selected"
config FPE_NWFPE
bool "NWFPE math emulation"
depends on !AEABI || OABI_COMPAT
---help---
Say Y to include the NWFPE floating point emulator in the kernel.
This is necessary to run most binaries. Linux does not currently
support floating point hardware so you need to say Y here even if
your machine has an FPA or floating point co-processor podule.
You may say N here if you are going to load the Acorn FPEmulator
early in the bootup.
config FPE_NWFPE_XP
bool "Support extended precision"
depends on FPE_NWFPE
help
Say Y to include 80-bit support in the kernel floating-point
emulator. Otherwise, only 32 and 64-bit support is compiled in.
Note that gcc does not generate 80-bit operations by default,
so in most cases this option only enlarges the size of the
floating point emulator without any good reason.
You almost surely want to say N here.
config FPE_FASTFPE
bool "FastFPE math emulation (EXPERIMENTAL)"
depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
---help---
Say Y here to include the FAST floating point emulator in the kernel.
This is an experimental much faster emulator which now also has full
precision for the mantissa. It does not support any exceptions.
It is very simple, and approximately 3-6 times faster than NWFPE.
It should be sufficient for most programs. It may be not suitable
for scientific calculations, but you have to check this for yourself.
If you do not feel you need a faster FP emulation you should better
choose NWFPE.
config VFP
bool "VFP-format floating point maths"
depends on CPU_V6 || CPU_ARM926T
help
Say Y to include VFP support code in the kernel. This is needed
if your hardware includes a VFP unit.
Please see <file:Documentation/arm/VFP/release-notes.txt> for
release notes and additional status information.
Say N if your target does not have VFP hardware.
endmenu
menu "Userspace binary formats"
source "fs/Kconfig.binfmt"
config ARTHUR
tristate "RISC OS personality"
depends on !AEABI
help
Say Y here to include the kernel code necessary if you want to run
Acorn RISC OS/Arthur binaries under Linux. This code is still very
experimental; if this sounds frightening, say N and sleep in peace.
You can also say M here to compile this support as a module (which
will be called arthur).
endmenu
menu "Power management options"
source "kernel/power/Kconfig"
endmenu
source "net/Kconfig"
menu "Device Drivers"
source "drivers/base/Kconfig"
source "drivers/connector/Kconfig"
if ALIGNMENT_TRAP || !CPU_CP15_MMU
source "drivers/mtd/Kconfig"
endif
source "drivers/parport/Kconfig"
source "drivers/pnp/Kconfig"
source "drivers/block/Kconfig"
# misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4