2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux Kernel Configuration"
14 select SYS_SUPPORTS_APM_EMULATION
17 select HAVE_KPROBES if (!XIP_KERNEL)
18 select HAVE_KRETPROBES if (HAVE_KPROBES)
19 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
20 select HAVE_GENERIC_DMA_COHERENT
22 The ARM series is a line of low-power-consumption RISC chip designs
23 licensed by ARM Ltd and targeted at embedded applications and
24 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
25 manufactured, but legacy ARM-based PC hardware remains popular in
26 Europe. There is an ARM Linux project with a web page at
27 <http://www.arm.linux.org.uk/>.
32 config SYS_SUPPORTS_APM_EMULATION
43 config GENERIC_CLOCKEVENTS
47 config GENERIC_CLOCKEVENTS_BROADCAST
49 depends on GENERIC_CLOCKEVENTS
50 default y if SMP && !LOCAL_TIMERS
63 The Extended Industry Standard Architecture (EISA) bus was
64 developed as an open alternative to the IBM MicroChannel bus.
66 The EISA bus provided some of the features of the IBM MicroChannel
67 bus while maintaining backward compatibility with cards made for
68 the older ISA bus. The EISA bus saw limited use between 1988 and
69 1995 when it was made obsolete by the PCI bus.
71 Say Y here if you are building a kernel for an EISA-based machine.
81 MicroChannel Architecture is found in some IBM PS/2 machines and
82 laptops. It is a bus system similar to PCI or ISA. See
83 <file:Documentation/mca.txt> (and especially the web page given
84 there) before attempting to build an MCA bus kernel.
86 config GENERIC_HARDIRQS
90 config STACKTRACE_SUPPORT
94 config HAVE_LATENCYTOP_SUPPORT
99 config LOCKDEP_SUPPORT
103 config TRACE_IRQFLAGS_SUPPORT
107 config HARDIRQS_SW_RESEND
111 config GENERIC_IRQ_PROBE
115 config GENERIC_LOCKBREAK
118 depends on SMP && PREEMPT
120 config RWSEM_GENERIC_SPINLOCK
124 config RWSEM_XCHGADD_ALGORITHM
127 config ARCH_HAS_ILOG2_U32
131 config ARCH_HAS_ILOG2_U64
135 config GENERIC_HWEIGHT
139 config GENERIC_CALIBRATE_DELAY
143 config ARCH_MAY_HAVE_PC_FDC
149 config GENERIC_ISA_DMA
158 config GENERIC_HARDIRQS_NO__DO_IRQ
163 config OPROFILE_ARMV6
165 depends on CPU_V6 && !SMP
166 select OPROFILE_ARM11_CORE
168 config OPROFILE_MPCORE
170 depends on CPU_V6 && SMP
171 select OPROFILE_ARM11_CORE
173 config OPROFILE_ARM11_CORE
176 config OPROFILE_ARMV7
178 depends on CPU_V7 && !SMP
185 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
186 default DRAM_BASE if REMAP_VECTORS_TO_RAM
189 The base address of exception vectors.
191 source "init/Kconfig"
193 source "kernel/Kconfig.freezer"
198 prompt "ARM system type"
199 default ARCH_VERSATILE
202 bool "Agilent AAEC-2000 based"
207 This enables support for systems based on the Agilent AAEC-2000
209 config ARCH_INTEGRATOR
210 bool "ARM Ltd. Integrator family"
216 Support for ARM's Integrator platform.
219 bool "ARM Ltd. RealView family"
225 select GENERIC_CLOCKEVENTS
227 This enables support for ARM Ltd RealView boards.
229 config ARCH_VERSATILE
230 bool "ARM Ltd. Versatile family"
237 select GENERIC_CLOCKEVENTS
239 This enables support for ARM Ltd Versatile board.
244 select ARCH_REQUIRE_GPIOLIB
247 This enables support for systems based on the Atmel AT91RM9200,
248 AT91SAM9 and AT91CAP9 processors.
251 bool "Cirrus Logic CLPS711x/EP721x-based"
254 Support for Cirrus Logic 711x/721x based boards.
262 This is an evaluation board for the StrongARM processor available
263 from Digital. It has limited hardware on-board, including an
264 Ethernet interface, two PCMCIA sockets, two serial ports and a
275 select ARCH_REQUIRE_GPIOLIB
277 This enables support for the Cirrus EP93xx series of CPUs.
280 bool "Cortina Systems Gemini"
283 select ARCH_REQUIRE_GPIOLIB
285 Support for the Cortina Systems Gemini family SoCs
287 config ARCH_FOOTBRIDGE
292 Support for systems based on the DC21285 companion chip
293 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
296 bool "Hilscher NetX based"
299 select GENERIC_CLOCKEVENTS
302 This enables support for systems based on the Hilscher NetX Soc
305 bool "Hynix HMS720x-based"
309 This enables support for systems based on the Hynix HMS720x
316 select GENERIC_CLOCKEVENTS
318 Support for Motorola's i.MX family of processors (MX1, MXL).
326 select ARCH_SUPPORTS_MSI
329 Support for Intel's IOP13XX (XScale) family of processors.
338 select ARCH_REQUIRE_GPIOLIB
340 Support for Intel's 80219 and IOP32X (XScale) family of
350 select ARCH_REQUIRE_GPIOLIB
352 Support for Intel's IOP33X (XScale) family of processors.
360 Support for Intel's IXP23xx (XScale) family of processors.
363 bool "IXP2400/2800-based"
368 Support for Intel's IXP2400/2800 (XScale) family of processors.
376 select GENERIC_CLOCKEVENTS
377 select DMABOUNCE if PCI
379 Support for Intel's IXP4XX (XScale) family of processors.
386 Say Y here if you intend to run this kernel on a LinkUp Systems
387 L7200 Software Development Board which uses an ARM720T processor.
388 Information on this board can be obtained at:
390 <http://www.linkupsys.com/>
392 If you have any questions or comments about the Linux kernel port
393 to this board, send e-mail to <sjhill@cotw.com>.
396 bool "Marvell Kirkwood"
401 select GENERIC_CLOCKEVENTS
404 Support for the following Marvell Kirkwood series SoCs:
405 88F6180, 88F6192 and 88F6281.
408 bool "Micrel/Kendin KS8695"
411 select ARCH_REQUIRE_GPIOLIB
413 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
414 System-on-Chip devices.
417 bool "NetSilicon NS9xxx"
421 select GENERIC_CLOCKEVENTS
424 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
427 <http://www.digi.com/products/microprocessors/index.jsp>
430 bool "Marvell Loki (88RC8480)"
433 select GENERIC_CLOCKEVENTS
436 Support for the Marvell Loki (88RC8480) SoC.
439 bool "Marvell MV78xx0"
444 select GENERIC_CLOCKEVENTS
447 Support for the following Marvell MV78xx0 series SoCs:
451 bool "Freescale MXC/iMX-based"
453 select GENERIC_CLOCKEVENTS
456 select ARCH_REQUIRE_GPIOLIB
458 Support for Freescale MXC/iMX-based family of processors
467 select GENERIC_CLOCKEVENTS
470 Support for the following Marvell Orion 5x series SoCs:
471 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
472 Orion-2 (5281), Orion-1-90 (6183).
475 bool "Philips Nexperia PNX4008 Mobile"
479 This enables support for Philips PNX4008 mobile platform.
482 bool "PXA2xx/PXA3xx-based"
488 select ARCH_REQUIRE_GPIOLIB
490 select GENERIC_CLOCKEVENTS
494 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
497 bool "Marvell PXA168/910"
500 select ARCH_REQUIRE_GPIOLIB
504 select GENERIC_CLOCKEVENTS
508 Support for Marvell's PXA168/910 processor line.
515 select ARCH_MAY_HAVE_PC_FDC
516 select HAVE_PATA_PLATFORM
519 select ARCH_SPARSEMEM_ENABLE
521 On the Acorn Risc-PC, Linux can support the internal IDE disk and
522 CD-ROM interface, serial and parallel port, and the floppy drive.
528 select ARCH_SPARSEMEM_ENABLE
532 select GENERIC_CLOCKEVENTS
535 select ARCH_REQUIRE_GPIOLIB
537 Support for StrongARM 11x0 based boards.
540 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
544 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
545 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
546 the Samsung SMDK2410 development board (and derivatives).
549 bool "Samsung S3C64XX"
553 Samsung S3C64XX series based systems
563 Support for the StrongARM based Digital DNARD machine, also known
564 as "Shark" (<http://www.shark-linux.de/shark.html>).
569 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
570 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
572 Say Y here for systems based on one of the Sharp LH7A40X
573 System on a Chip processors. These CPUs include an ARM922T
574 core with a wide array of integrated devices for
575 hand-held and low-power applications.
581 select GENERIC_CLOCKEVENTS
583 select ARCH_REQUIRE_GPIOLIB
589 Support for TI's DaVinci platform.
595 select ARCH_REQUIRE_GPIOLIB
597 select GENERIC_CLOCKEVENTS
599 Support for TI's OMAP platform (OMAP1 and OMAP2).
605 select GENERIC_CLOCKEVENTS
607 Support for Qualcomm MSM7K based systems. This runs on the ARM11
608 apps processor of the MSM7K and depends on a shared memory
609 interface to the ARM9 modem processor which runs the baseband stack
610 and controls some vital subsystems (clock and power control, etc).
613 bool "Nuvoton W90X900 CPU"
616 Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
617 can login www.mcuos.com or www.nuvoton.com to know more.
621 source "arch/arm/mach-clps711x/Kconfig"
623 source "arch/arm/mach-ep93xx/Kconfig"
625 source "arch/arm/mach-footbridge/Kconfig"
627 source "arch/arm/mach-gemini/Kconfig"
629 source "arch/arm/mach-integrator/Kconfig"
631 source "arch/arm/mach-iop32x/Kconfig"
633 source "arch/arm/mach-iop33x/Kconfig"
635 source "arch/arm/mach-iop13xx/Kconfig"
637 source "arch/arm/mach-ixp4xx/Kconfig"
639 source "arch/arm/mach-ixp2000/Kconfig"
641 source "arch/arm/mach-ixp23xx/Kconfig"
643 source "arch/arm/mach-loki/Kconfig"
645 source "arch/arm/mach-mv78xx0/Kconfig"
647 source "arch/arm/mach-pxa/Kconfig"
648 source "arch/arm/plat-pxa/Kconfig"
650 source "arch/arm/mach-mmp/Kconfig"
652 source "arch/arm/mach-sa1100/Kconfig"
654 source "arch/arm/plat-omap/Kconfig"
656 source "arch/arm/mach-omap1/Kconfig"
658 source "arch/arm/mach-omap2/Kconfig"
660 source "arch/arm/mach-orion5x/Kconfig"
662 source "arch/arm/mach-kirkwood/Kconfig"
664 source "arch/arm/plat-s3c24xx/Kconfig"
665 source "arch/arm/plat-s3c64xx/Kconfig"
666 source "arch/arm/plat-s3c/Kconfig"
669 source "arch/arm/mach-s3c2400/Kconfig"
670 source "arch/arm/mach-s3c2410/Kconfig"
671 source "arch/arm/mach-s3c2412/Kconfig"
672 source "arch/arm/mach-s3c2440/Kconfig"
673 source "arch/arm/mach-s3c2442/Kconfig"
674 source "arch/arm/mach-s3c2443/Kconfig"
678 source "arch/arm/mach-s3c6400/Kconfig"
679 source "arch/arm/mach-s3c6410/Kconfig"
682 source "arch/arm/mach-lh7a40x/Kconfig"
684 source "arch/arm/mach-imx/Kconfig"
686 source "arch/arm/mach-h720x/Kconfig"
688 source "arch/arm/mach-versatile/Kconfig"
690 source "arch/arm/mach-aaec2000/Kconfig"
692 source "arch/arm/mach-realview/Kconfig"
694 source "arch/arm/mach-at91/Kconfig"
696 source "arch/arm/plat-mxc/Kconfig"
698 source "arch/arm/mach-netx/Kconfig"
700 source "arch/arm/mach-ns9xxx/Kconfig"
702 source "arch/arm/mach-davinci/Kconfig"
704 source "arch/arm/mach-ks8695/Kconfig"
706 source "arch/arm/mach-msm/Kconfig"
708 source "arch/arm/mach-w90x900/Kconfig"
710 # Definitions to make life easier
723 source arch/arm/mm/Kconfig
726 bool "Enable iWMMXt support"
727 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
728 default y if PXA27x || PXA3xx || ARCH_MMP
730 Enable support for iWMMXt context switching at run time if
731 running on a CPU that supports it.
733 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
736 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
740 source "arch/arm/Kconfig-nommu"
743 config ARM_ERRATA_411920
744 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
745 depends on CPU_V6 && !SMP
747 Invalidation of the Instruction Cache operation can
748 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
749 It does not affect the MPCore. This option enables the ARM Ltd.
750 recommended workaround.
752 config ARM_ERRATA_430973
753 bool "ARM errata: Stale prediction on replaced interworking branch"
756 This option enables the workaround for the 430973 Cortex-A8
757 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
758 interworking branch is replaced with another code sequence at the
759 same virtual address, whether due to self-modifying code or virtual
760 to physical address re-mapping, Cortex-A8 does not recover from the
761 stale interworking branch prediction. This results in Cortex-A8
762 executing the new code sequence in the incorrect ARM or Thumb state.
763 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
764 and also flushes the branch target cache at every context switch.
765 Note that setting specific bits in the ACTLR register may not be
766 available in non-secure mode.
770 source "arch/arm/common/Kconfig"
772 config FORCE_MAX_ZONEORDER
785 Find out whether you have ISA slots on your motherboard. ISA is the
786 name of a bus system, i.e. the way the CPU talks to the other stuff
787 inside your box. Other bus systems are PCI, EISA, MicroChannel
788 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
789 newer boards don't support it. If you have ISA, say Y, otherwise N.
791 # Select ISA DMA controller support
796 # Select ISA DMA interface
801 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
803 Find out whether you have a PCI motherboard. PCI is the name of a
804 bus system, i.e. the way the CPU talks to the other stuff inside
805 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
806 VESA. If you have PCI, say Y, otherwise N.
811 # Select the host bridge type
812 config PCI_HOST_VIA82C505
814 depends on PCI && ARCH_SHARK
817 config PCI_HOST_ITE8152
819 depends on PCI && MACH_ARMCORE
823 source "drivers/pci/Kconfig"
825 source "drivers/pcmcia/Kconfig"
829 menu "Kernel Features"
831 source "kernel/time/Kconfig"
834 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
835 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP)
836 select USE_GENERIC_SMP_HELPERS
838 This enables support for systems with more than one CPU. If you have
839 a system with only one CPU, like most personal computers, say N. If
840 you have a system with more than one CPU, say Y.
842 If you say N here, the kernel will run on single and multiprocessor
843 machines, but will use only one CPU of a multiprocessor machine. If
844 you say Y here, the kernel will run on many, but not all, single
845 processor machines. On a single processor machine, the kernel will
846 run faster if you say N here.
848 See also <file:Documentation/i386/IO-APIC.txt>,
849 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
850 <http://www.linuxdoc.org/docs.html#howto>.
852 If you don't know what to do here, say N.
855 prompt "Memory split"
858 Select the desired split between kernel and user memory.
860 If you are not absolutely sure what you are doing, leave this
864 bool "3G/1G user/kernel split"
866 bool "2G/2G user/kernel split"
868 bool "1G/3G user/kernel split"
873 default 0x40000000 if VMSPLIT_1G
874 default 0x80000000 if VMSPLIT_2G
878 int "Maximum number of CPUs (2-32)"
884 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
885 depends on SMP && HOTPLUG && EXPERIMENTAL
887 Say Y here to experiment with turning CPUs off and on. CPUs
888 can be controlled through /sys/devices/system/cpu.
891 bool "Use local timer interrupts"
892 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP)
895 Enable support for local timers on SMP platforms, rather then the
896 legacy IPI broadcast method. Local timers allows the system
897 accounting to be spread across the timer interval, preventing a
898 "thundering herd" at every timer tick.
901 bool "Preemptible Kernel (EXPERIMENTAL)"
902 depends on EXPERIMENTAL
904 This option reduces the latency of the kernel when reacting to
905 real-time or interactive events by allowing a low priority process to
906 be preempted even if it is in kernel mode executing a system call.
907 This allows applications to run more reliably even when the system is
910 Say Y here if you are building a kernel for a desktop, embedded
911 or real-time system. Say N if you are unsure.
915 default 128 if ARCH_L7200
916 default 200 if ARCH_EBSA110 || ARCH_S3C2410
917 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
918 default AT91_TIMER_HZ if ARCH_AT91
922 bool "Use the ARM EABI to compile the kernel"
924 This option allows for the kernel to be compiled using the latest
925 ARM ABI (aka EABI). This is only useful if you are using a user
926 space environment that is also compiled with EABI.
928 Since there are major incompatibilities between the legacy ABI and
929 EABI, especially with regard to structure member alignment, this
930 option also changes the kernel syscall calling convention to
931 disambiguate both ABIs and allow for backward compatibility support
932 (selected with CONFIG_OABI_COMPAT).
934 To use this you need GCC version 4.0.0 or later.
937 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
938 depends on AEABI && EXPERIMENTAL
941 This option preserves the old syscall interface along with the
942 new (ARM EABI) one. It also provides a compatibility layer to
943 intercept syscalls that have structure arguments which layout
944 in memory differs between the legacy ABI and the new ARM EABI
945 (only for non "thumb" binaries). This option adds a tiny
946 overhead to all syscalls and produces a slightly larger kernel.
947 If you know you'll be using only pure EABI user space then you
948 can say N here. If this option is not selected and you attempt
949 to execute a legacy ABI binary then the result will be
950 UNPREDICTABLE (in fact it can be predicted that it won't work
951 at all). If in doubt say Y.
953 config ARCH_FLATMEM_HAS_HOLES
958 # Discontigmem is deprecated
959 config ARCH_DISCONTIGMEM_ENABLE
962 config ARCH_SPARSEMEM_ENABLE
965 config ARCH_SPARSEMEM_DEFAULT
966 def_bool ARCH_SPARSEMEM_ENABLE
968 config ARCH_SELECT_MEMORY_MODEL
969 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
973 default "4" if ARCH_LH7A40X
975 depends on NEED_MULTIPLE_NODES
978 bool "High Memory Support (EXPERIMENTAL)"
979 depends on MMU && EXPERIMENTAL
981 The address space of ARM processors is only 4 Gigabytes large
982 and it has to accommodate user address space, kernel address
983 space as well as some memory mapped IO. That means that, if you
984 have a large amount of physical memory and/or IO, not all of the
985 memory can be "permanently mapped" by the kernel. The physical
986 memory that is not permanently mapped is called "high memory".
988 Depending on the selected kernel/user memory split, minimum
989 vmalloc space and actual amount of RAM, you may not need this
990 option which should result in a slightly faster kernel.
997 bool "Timer and CPU usage LEDs"
998 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
999 ARCH_EBSA285 || ARCH_IMX || ARCH_INTEGRATOR || \
1000 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1001 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1002 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1003 ARCH_AT91 || ARCH_DAVINCI || \
1004 ARCH_KS8695 || MACH_RD88F5182
1006 If you say Y here, the LEDs on your machine will be used
1007 to provide useful information about your current system status.
1009 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1010 be able to select which LEDs are active using the options below. If
1011 you are compiling a kernel for the EBSA-110 or the LART however, the
1012 red LED will simply flash regularly to indicate that the system is
1013 still functional. It is safe to say Y here if you have a CATS
1014 system, but the driver will do nothing.
1017 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1018 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1019 || MACH_OMAP_PERSEUS2
1021 depends on !GENERIC_CLOCKEVENTS
1022 default y if ARCH_EBSA110
1024 If you say Y here, one of the system LEDs (the green one on the
1025 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1026 will flash regularly to indicate that the system is still
1027 operational. This is mainly useful to kernel hackers who are
1028 debugging unstable kernels.
1030 The LART uses the same LED for both Timer LED and CPU usage LED
1031 functions. You may choose to use both, but the Timer LED function
1032 will overrule the CPU usage LED.
1035 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1037 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1038 || MACH_OMAP_PERSEUS2
1041 If you say Y here, the red LED will be used to give a good real
1042 time indication of CPU usage, by lighting whenever the idle task
1043 is not currently executing.
1045 The LART uses the same LED for both Timer LED and CPU usage LED
1046 functions. You may choose to use both, but the Timer LED function
1047 will overrule the CPU usage LED.
1049 config ALIGNMENT_TRAP
1051 depends on CPU_CP15_MMU
1052 default y if !ARCH_EBSA110
1054 ARM processors cannot fetch/store information which is not
1055 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1056 address divisible by 4. On 32-bit ARM processors, these non-aligned
1057 fetch/store instructions will be emulated in software if you say
1058 here, which has a severe performance impact. This is necessary for
1059 correct operation of some network protocols. With an IP-only
1060 configuration it is safe to say N, otherwise say Y.
1066 # Compressed boot loader in ROM. Yes, we really want to ask about
1067 # TEXT and BSS so we preserve their values in the config files.
1068 config ZBOOT_ROM_TEXT
1069 hex "Compressed ROM boot loader base address"
1072 The physical address at which the ROM-able zImage is to be
1073 placed in the target. Platforms which normally make use of
1074 ROM-able zImage formats normally set this to a suitable
1075 value in their defconfig file.
1077 If ZBOOT_ROM is not enabled, this has no effect.
1079 config ZBOOT_ROM_BSS
1080 hex "Compressed ROM boot loader BSS address"
1083 The base address of an area of read/write memory in the target
1084 for the ROM-able zImage which must be available while the
1085 decompressor is running. It must be large enough to hold the
1086 entire decompressed kernel plus an additional 128 KiB.
1087 Platforms which normally make use of ROM-able zImage formats
1088 normally set this to a suitable value in their defconfig file.
1090 If ZBOOT_ROM is not enabled, this has no effect.
1093 bool "Compressed boot loader in ROM/flash"
1094 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1096 Say Y here if you intend to execute your compressed kernel image
1097 (zImage) directly from ROM or flash. If unsure, say N.
1100 string "Default kernel command string"
1103 On some architectures (EBSA110 and CATS), there is currently no way
1104 for the boot loader to pass arguments to the kernel. For these
1105 architectures, you should supply some command-line options at build
1106 time by entering them here. As a minimum, you should specify the
1107 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1110 bool "Kernel Execute-In-Place from ROM"
1111 depends on !ZBOOT_ROM
1113 Execute-In-Place allows the kernel to run from non-volatile storage
1114 directly addressable by the CPU, such as NOR flash. This saves RAM
1115 space since the text section of the kernel is not loaded from flash
1116 to RAM. Read-write sections, such as the data section and stack,
1117 are still copied to RAM. The XIP kernel is not compressed since
1118 it has to run directly from flash, so it will take more space to
1119 store it. The flash address used to link the kernel object files,
1120 and for storing it, is configuration dependent. Therefore, if you
1121 say Y here, you must know the proper physical address where to
1122 store the kernel image depending on your own flash memory usage.
1124 Also note that the make target becomes "make xipImage" rather than
1125 "make zImage" or "make Image". The final kernel binary to put in
1126 ROM memory will be arch/arm/boot/xipImage.
1130 config XIP_PHYS_ADDR
1131 hex "XIP Kernel Physical Location"
1132 depends on XIP_KERNEL
1133 default "0x00080000"
1135 This is the physical address in your flash memory the kernel will
1136 be linked for and stored to. This address is dependent on your
1140 bool "Kexec system call (EXPERIMENTAL)"
1141 depends on EXPERIMENTAL
1143 kexec is a system call that implements the ability to shutdown your
1144 current kernel, and to start another kernel. It is like a reboot
1145 but it is independent of the system firmware. And like a reboot
1146 you can start any kernel with it, not just Linux.
1148 It is an ongoing process to be certain the hardware in a machine
1149 is properly shutdown, so do not be surprised if this code does not
1150 initially work for you. It may help to enable device hotplugging
1154 bool "Export atags in procfs"
1158 Should the atags used to boot the kernel be exported in an "atags"
1159 file in procfs. Useful with kexec.
1163 menu "CPU Power Management"
1165 if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
1167 source "drivers/cpufreq/Kconfig"
1169 config CPU_FREQ_SA1100
1171 depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
1174 config CPU_FREQ_SA1110
1176 depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
1179 config CPU_FREQ_INTEGRATOR
1180 tristate "CPUfreq driver for ARM Integrator CPUs"
1181 depends on ARCH_INTEGRATOR && CPU_FREQ
1184 This enables the CPUfreq driver for ARM Integrator CPUs.
1186 For details, take a look at <file:Documentation/cpu-freq>.
1191 tristate "CPUfreq driver for i.MX CPUs"
1192 depends on ARCH_IMX && CPU_FREQ
1195 This enables the CPUfreq driver for i.MX CPUs.
1201 source "drivers/cpuidle/Kconfig"
1205 menu "Floating point emulation"
1207 comment "At least one emulation must be selected"
1210 bool "NWFPE math emulation"
1211 depends on !AEABI || OABI_COMPAT
1213 Say Y to include the NWFPE floating point emulator in the kernel.
1214 This is necessary to run most binaries. Linux does not currently
1215 support floating point hardware so you need to say Y here even if
1216 your machine has an FPA or floating point co-processor podule.
1218 You may say N here if you are going to load the Acorn FPEmulator
1219 early in the bootup.
1222 bool "Support extended precision"
1223 depends on FPE_NWFPE
1225 Say Y to include 80-bit support in the kernel floating-point
1226 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1227 Note that gcc does not generate 80-bit operations by default,
1228 so in most cases this option only enlarges the size of the
1229 floating point emulator without any good reason.
1231 You almost surely want to say N here.
1234 bool "FastFPE math emulation (EXPERIMENTAL)"
1235 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1237 Say Y here to include the FAST floating point emulator in the kernel.
1238 This is an experimental much faster emulator which now also has full
1239 precision for the mantissa. It does not support any exceptions.
1240 It is very simple, and approximately 3-6 times faster than NWFPE.
1242 It should be sufficient for most programs. It may be not suitable
1243 for scientific calculations, but you have to check this for yourself.
1244 If you do not feel you need a faster FP emulation you should better
1248 bool "VFP-format floating point maths"
1249 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1251 Say Y to include VFP support code in the kernel. This is needed
1252 if your hardware includes a VFP unit.
1254 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1255 release notes and additional status information.
1257 Say N if your target does not have VFP hardware.
1265 bool "Advanced SIMD (NEON) Extension support"
1266 depends on VFPv3 && CPU_V7
1268 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1273 menu "Userspace binary formats"
1275 source "fs/Kconfig.binfmt"
1278 tristate "RISC OS personality"
1281 Say Y here to include the kernel code necessary if you want to run
1282 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1283 experimental; if this sounds frightening, say N and sleep in peace.
1284 You can also say M here to compile this support as a module (which
1285 will be called arthur).
1289 menu "Power management options"
1291 source "kernel/power/Kconfig"
1293 config ARCH_SUSPEND_POSSIBLE
1298 source "net/Kconfig"
1300 menu "Device Drivers"
1302 source "drivers/base/Kconfig"
1304 source "drivers/connector/Kconfig"
1306 if ALIGNMENT_TRAP || !CPU_CP15_MMU
1307 source "drivers/mtd/Kconfig"
1310 source "drivers/parport/Kconfig"
1312 source "drivers/pnp/Kconfig"
1314 source "drivers/block/Kconfig"
1316 # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
1318 source "drivers/misc/Kconfig"
1320 source "drivers/ide/Kconfig"
1322 source "drivers/scsi/Kconfig"
1324 source "drivers/ata/Kconfig"
1326 source "drivers/md/Kconfig"
1328 source "drivers/message/fusion/Kconfig"
1330 source "drivers/ieee1394/Kconfig"
1332 source "drivers/message/i2o/Kconfig"
1334 source "drivers/net/Kconfig"
1336 source "drivers/isdn/Kconfig"
1338 # input before char - char/joystick depends on it. As does USB.
1340 source "drivers/input/Kconfig"
1342 source "drivers/char/Kconfig"
1344 source "drivers/i2c/Kconfig"
1346 source "drivers/spi/Kconfig"
1348 source "drivers/gpio/Kconfig"
1350 source "drivers/w1/Kconfig"
1352 source "drivers/power/Kconfig"
1354 source "drivers/hwmon/Kconfig"
1356 source "drivers/thermal/Kconfig"
1358 source "drivers/watchdog/Kconfig"
1360 source "drivers/ssb/Kconfig"
1362 #source "drivers/l3/Kconfig"
1364 source "drivers/mfd/Kconfig"
1366 source "drivers/media/Kconfig"
1368 source "drivers/video/Kconfig"
1370 source "sound/Kconfig"
1372 source "drivers/hid/Kconfig"
1374 source "drivers/usb/Kconfig"
1376 source "drivers/uwb/Kconfig"
1378 source "drivers/mmc/Kconfig"
1380 source "drivers/memstick/Kconfig"
1382 source "drivers/accessibility/Kconfig"
1384 source "drivers/leds/Kconfig"
1386 source "drivers/rtc/Kconfig"
1388 source "drivers/dma/Kconfig"
1390 source "drivers/dca/Kconfig"
1392 source "drivers/auxdisplay/Kconfig"
1394 source "drivers/regulator/Kconfig"
1396 source "drivers/uio/Kconfig"
1398 source "drivers/staging/Kconfig"
1404 source "arch/arm/Kconfig.debug"
1406 source "security/Kconfig"
1408 source "crypto/Kconfig"
1410 source "lib/Kconfig"