# # 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 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 . config MMU bool default y 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 (and especially the web page given there) before attempting to build an MCA bus kernel. config UID16 bool default y config RWSEM_GENERIC_SPINLOCK bool default y config RWSEM_XCHGADD_ALGORITHM bool config GENERIC_CALIBRATE_DELAY bool default y config GENERIC_BUST_SPINLOCK bool config GENERIC_ISA_DMA bool config GENERIC_IOMAP bool default y config FIQ bool source "init/Kconfig" menu "System Type" choice prompt "ARM system type" default ARCH_RPC config ARCH_CLPS7500 bool "Cirrus-CL-PS7500FE" select TIMER_ACORN config ARCH_CLPS711X bool "CLPS711x/EP721x-based" config ARCH_CO285 bool "Co-EBSA285" select FOOTBRIDGE select FOOTBRIDGE_ADDIN config ARCH_EBSA110 bool "EBSA-110" help This is an evaluation board for the StrongARM processor available from Digital. It has limited hardware on-board, including an onboard Ethernet interface, two PCMCIA sockets, two serial ports and a parallel port. config ARCH_CAMELOT bool "Epxa10db" help This enables support for Altera's Excalibur XA10 development board. If you would like to build your kernel to run on one of these boards then you must say 'Y' here. Otherwise say 'N' config ARCH_FOOTBRIDGE bool "FootBridge" select FOOTBRIDGE config ARCH_INTEGRATOR bool "Integrator" select ARM_AMBA select ICST525 config ARCH_IOP3XX bool "IOP3xx-based" config ARCH_IXP4XX bool "IXP4xx-based" select DMABOUNCE config ARCH_IXP2000 bool "IXP2400/2800-based" 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: If you have any questions or comments about the Linux kernel port to this board, send e-mail to . config ARCH_PXA bool "PXA2xx-based" config ARCH_RPC bool "RiscPC" select ARCH_ACORN select FIQ select TIMER_ACORN 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" config ARCH_S3C2410 bool "Samsung S3C2410" help Samsung S3C2410X CPU based systems, such as the Simtec Electronics BAST (), the IPAQ 1940 or the Samsung SMDK2410 development board (and derviatives). config ARCH_SHARK bool "Shark" 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_OMAP bool "TI OMAP" config ARCH_VERSATILE bool "Versatile" select ARM_AMBA select ICST307 help This enables support for ARM Ltd Versatile board. config ARCH_IMX bool "IMX" config ARCH_H720X bool "Hynix-HMS720x-based" help This enables support for systems based on the Hynix HMS720x endchoice source "arch/arm/mach-clps711x/Kconfig" source "arch/arm/mach-epxa10db/Kconfig" source "arch/arm/mach-footbridge/Kconfig" source "arch/arm/mach-integrator/Kconfig" source "arch/arm/mach-iop3xx/Kconfig" source "arch/arm/mach-ixp4xx/Kconfig" source "arch/arm/mach-ixp2000/Kconfig" source "arch/arm/mach-pxa/Kconfig" source "arch/arm/mach-sa1100/Kconfig" source "arch/arm/mach-omap/Kconfig" source "arch/arm/mach-s3c2410/Kconfig" source "arch/arm/mach-lh7a40x/Kconfig" source "arch/arm/mach-imx/Kconfig" source "arch/arm/mach-h720x/Kconfig" source "arch/arm/mach-versatile/Kconfig" # Definitions to make life easier config ARCH_ACORN bool source arch/arm/mm/Kconfig # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER config XSCALE_PMU bool depends on CPU_XSCALE && !XSCALE_PMU_TIMER default y 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 depends on FOOTBRIDGE_HOST || ARCH_SHARK || ARCH_CLPS7500 || ARCH_EBSA110 || ARCH_CDB89712 || ARCH_EDB7211 || ARCH_SA1100 || ARCH_MX1ADS default y 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. config ISA_DMA bool depends on FOOTBRIDGE_HOST || ARCH_SHARK default y config ISA_DMA_API bool default y config PCI bool "PCI support" if ARCH_INTEGRATOR_AP default y if ARCH_SHARK || FOOTBRIDGE_HOST || ARCH_IOP3XX || ARCH_IXP4XX || ARCH_IXP2000 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 , contains valuable information about which PCI hardware does work under Linux and which doesn't. # 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" config SMP bool "Symmetric Multi-Processing (EXPERIMENTAL)" depends on EXPERIMENTAL && n 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 , , , and the SMP-HOWTO available at . 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 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 DISCONTIGMEM bool depends on ARCH_EDB7211 || ARCH_SA1100 || (ARCH_LH7A40X && !LH7A40X_CONTIGMEM) default y 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 for more. 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 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) || \ MACH_OMAP_H2 || MACH_OMAP_PERSEUS2 depends on LEDS 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) || 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 default y if !ARCH_EBSA110 help ARM processors can not 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 64KiB of read/write memory in the target for the ROM-able zImage, which must be available while the decompressor is running. 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. endmenu if (ARCH_SA1100 || ARCH_INTEGRATOR) menu "CPU Frequency scaling" source "drivers/cpufreq/Kconfig" config CPU_FREQ_SA1100 bool depends on CPU_FREQ && (SA1100_LART || SA1100_PLEB) 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 . If in doubt, say Y. endmenu endif menu "Floating point emulation" comment "At least one emulation must be selected" config FPE_NWFPE bool "NWFPE math emulation" ---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 && !CPU_BIG_ENDIAN 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 !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 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" 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" config PM bool "Power Management support" ---help--- "Power Management" means that parts of your computer are shut off or put into a power conserving "sleep" mode if they are not being used. There are two competing standards for doing this: APM and ACPI. If you want to use either one, say Y here and then also to the requisite support below. Power Management is most important for battery powered laptop computers; if you have a laptop, check out the Linux Laptop home page on the WWW at or Tuxmobil - Linux on Mobile Computers at and the Battery Powered Linux mini-HOWTO, available from . Note that, even if you say N here, Linux on the x86 architecture will issue the hlt instruction if nothing is to be done, thereby sending the processor to sleep and saving power. config APM tristate "Advanced Power Management Emulation" depends on PM ---help--- APM is a BIOS specification for saving power using several different techniques. This is mostly useful for battery powered laptops with APM compliant BIOSes. If you say Y here, the system time will be reset after a RESUME operation, the /proc/apm device will provide battery status information, and user-space programs will receive notification of APM "events" (e.g. battery status change). If you select "Y" here, you can disable actual use of the APM BIOS by passing the "apm=off" option to the kernel at boot time. Note that the APM support is almost completely disabled for machines with more than one CPU. In order to use APM, you will need supporting software. For location and more information, read and the Battery Powered Linux mini-HOWTO, available from . This driver does not spin down disk drives (see the hdparm(8) manpage ("man 8 hdparm") for that), and it doesn't turn off VESA-compliant "green" monitors. This driver does not support the TI 4000M TravelMate and the ACER 486/DX4/75 because they don't have compliant BIOSes. Many "green" desktop machines also don't have compliant BIOSes, and this driver may cause those machines to panic during the boot phase. Generally, if you don't have a battery in your machine, there isn't much point in using this driver and you should say N. If you get random kernel OOPSes or reboots that don't seem to be related to anything, try disabling/enabling this option (or disabling/enabling APM in your BIOS). Some other things you should try when experiencing seemingly random, "weird" problems: 1) make sure that you have enough swap space and that it is enabled. 2) pass the "no-hlt" option to the kernel 3) switch on floating point emulation in the kernel and pass the "no387" option to the kernel 4) pass the "floppy=nodma" option to the kernel 5) pass the "mem=4M" option to the kernel (thereby disabling all but the first 4 MB of RAM) 6) make sure that the CPU is not over clocked. 7) read the sig11 FAQ at 8) disable the cache from your BIOS settings 9) install a fan for the video card or exchange video RAM 10) install a better fan for the CPU 11) exchange RAM chips 12) exchange the motherboard. To compile this driver as a module, choose M here: the module will be called apm. endmenu menu "Device Drivers" source "drivers/base/Kconfig" if ALIGNMENT_TRAP source "drivers/mtd/Kconfig" endif source "drivers/parport/Kconfig" source "drivers/pnp/Kconfig" source "drivers/block/Kconfig" source "drivers/acorn/block/Kconfig" if ARCH_CLPS7500 || ARCH_IOP3XX || ARCH_IXP4XX || ARCH_L7200 || ARCH_LH7A40X || ARCH_PXA || ARCH_RPC || ARCH_S3C2410 || ARCH_SA1100 || ARCH_SHARK || FOOTBRIDGE source "drivers/ide/Kconfig" endif source "drivers/scsi/Kconfig" source "drivers/md/Kconfig" source "drivers/message/fusion/Kconfig" source "drivers/ieee1394/Kconfig" source "drivers/message/i2o/Kconfig" source "net/Kconfig" source "drivers/isdn/Kconfig" # input before char - char/joystick depends on it. As does USB. source "drivers/input/Kconfig" source "drivers/char/Kconfig" source "drivers/i2c/Kconfig" #source "drivers/l3/Kconfig" source "drivers/misc/Kconfig" source "drivers/media/Kconfig" source "drivers/video/Kconfig" source "sound/Kconfig" source "drivers/usb/Kconfig" source "drivers/mmc/Kconfig" endmenu source "fs/Kconfig" source "arch/arm/oprofile/Kconfig" source "arch/arm/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" source "lib/Kconfig"