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
15 select GENERIC_ATOMIC64 if (!CPU_32v6K)
16 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
18 select HAVE_KPROBES if (!XIP_KERNEL)
19 select HAVE_KRETPROBES if (HAVE_KPROBES)
20 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
21 select HAVE_GENERIC_DMA_COHERENT
22 select HAVE_KERNEL_GZIP
23 select HAVE_KERNEL_LZO
24 select HAVE_KERNEL_LZMA
25 select HAVE_PERF_EVENTS
26 select PERF_USE_VMALLOC
28 The ARM series is a line of low-power-consumption RISC chip designs
29 licensed by ARM Ltd and targeted at embedded applications and
30 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
31 manufactured, but legacy ARM-based PC hardware remains popular in
32 Europe. There is an ARM Linux project with a web page at
33 <http://www.arm.linux.org.uk/>.
38 config SYS_SUPPORTS_APM_EMULATION
48 config ARCH_USES_GETTIMEOFFSET
52 config GENERIC_CLOCKEVENTS
55 config GENERIC_CLOCKEVENTS_BROADCAST
57 depends on GENERIC_CLOCKEVENTS
58 default y if SMP && !LOCAL_TIMERS
62 select GENERIC_ALLOCATOR
73 The Extended Industry Standard Architecture (EISA) bus was
74 developed as an open alternative to the IBM MicroChannel bus.
76 The EISA bus provided some of the features of the IBM MicroChannel
77 bus while maintaining backward compatibility with cards made for
78 the older ISA bus. The EISA bus saw limited use between 1988 and
79 1995 when it was made obsolete by the PCI bus.
81 Say Y here if you are building a kernel for an EISA-based machine.
91 MicroChannel Architecture is found in some IBM PS/2 machines and
92 laptops. It is a bus system similar to PCI or ISA. See
93 <file:Documentation/mca.txt> (and especially the web page given
94 there) before attempting to build an MCA bus kernel.
96 config GENERIC_HARDIRQS
100 config STACKTRACE_SUPPORT
104 config HAVE_LATENCYTOP_SUPPORT
109 config LOCKDEP_SUPPORT
113 config TRACE_IRQFLAGS_SUPPORT
117 config HARDIRQS_SW_RESEND
121 config GENERIC_IRQ_PROBE
125 config GENERIC_LOCKBREAK
128 depends on SMP && PREEMPT
130 config RWSEM_GENERIC_SPINLOCK
134 config RWSEM_XCHGADD_ALGORITHM
137 config ARCH_HAS_ILOG2_U32
140 config ARCH_HAS_ILOG2_U64
143 config ARCH_HAS_CPUFREQ
146 Internal node to signify that the ARCH has CPUFREQ support
147 and that the relevant menu configurations are displayed for
150 config GENERIC_HWEIGHT
154 config GENERIC_CALIBRATE_DELAY
158 config ARCH_MAY_HAVE_PC_FDC
164 config NEED_DMA_MAP_STATE
167 config GENERIC_ISA_DMA
176 config GENERIC_HARDIRQS_NO__DO_IRQ
179 config ARM_L1_CACHE_SHIFT_6
182 Setting ARM L1 cache line size to 64 Bytes.
186 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
187 default DRAM_BASE if REMAP_VECTORS_TO_RAM
190 The base address of exception vectors.
192 source "init/Kconfig"
194 source "kernel/Kconfig.freezer"
199 bool "MMU-based Paged Memory Management Support"
202 Select if you want MMU-based virtualised addressing space
203 support by paged memory management. If unsure, say 'Y'.
206 # The "ARM system type" choice list is ordered alphabetically by option
207 # text. Please add new entries in the option alphabetic order.
210 prompt "ARM system type"
211 default ARCH_VERSATILE
214 bool "Agilent AAEC-2000 based"
218 select ARCH_USES_GETTIMEOFFSET
220 This enables support for systems based on the Agilent AAEC-2000
222 config ARCH_INTEGRATOR
223 bool "ARM Ltd. Integrator family"
225 select ARCH_HAS_CPUFREQ
229 select GENERIC_CLOCKEVENTS
230 select PLAT_VERSATILE
232 Support for ARM's Integrator platform.
235 bool "ARM Ltd. RealView family"
240 select GENERIC_CLOCKEVENTS
241 select ARCH_WANT_OPTIONAL_GPIOLIB
242 select PLAT_VERSATILE
243 select ARM_TIMER_SP804
245 This enables support for ARM Ltd RealView boards.
247 config ARCH_VERSATILE
248 bool "ARM Ltd. Versatile family"
254 select GENERIC_CLOCKEVENTS
255 select ARCH_WANT_OPTIONAL_GPIOLIB
256 select PLAT_VERSATILE
257 select ARM_TIMER_SP804
259 This enables support for ARM Ltd Versatile board.
262 bool "ARM Ltd. Versatile Express family"
263 select ARCH_WANT_OPTIONAL_GPIOLIB
265 select ARM_TIMER_SP804
267 select GENERIC_CLOCKEVENTS
271 select PLAT_VERSATILE
273 This enables support for the ARM Ltd Versatile Express boards.
277 select ARCH_REQUIRE_GPIOLIB
279 select ARCH_USES_GETTIMEOFFSET
281 This enables support for systems based on the Atmel AT91RM9200,
282 AT91SAM9 and AT91CAP9 processors.
285 bool "Broadcom BCMRING"
291 select GENERIC_CLOCKEVENTS
292 select ARCH_WANT_OPTIONAL_GPIOLIB
294 Support for Broadcom's BCMRing platform.
297 bool "Cirrus Logic CLPS711x/EP721x-based"
299 select ARCH_USES_GETTIMEOFFSET
301 Support for Cirrus Logic 711x/721x based boards.
304 bool "Cortina Systems Gemini"
306 select ARCH_REQUIRE_GPIOLIB
307 select ARCH_USES_GETTIMEOFFSET
309 Support for the Cortina Systems Gemini family SoCs
316 select ARCH_USES_GETTIMEOFFSET
318 This is an evaluation board for the StrongARM processor available
319 from Digital. It has limited hardware on-board, including an
320 Ethernet interface, two PCMCIA sockets, two serial ports and a
329 select ARCH_REQUIRE_GPIOLIB
330 select ARCH_HAS_HOLES_MEMORYMODEL
331 select ARCH_USES_GETTIMEOFFSET
333 This enables support for the Cirrus EP93xx series of CPUs.
335 config ARCH_FOOTBRIDGE
339 select ARCH_USES_GETTIMEOFFSET
341 Support for systems based on the DC21285 companion chip
342 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
345 bool "Freescale MXC/iMX-based"
347 select GENERIC_CLOCKEVENTS
348 select ARCH_REQUIRE_GPIOLIB
351 Support for Freescale MXC/iMX-based family of processors
354 bool "Freescale STMP3xxx"
357 select ARCH_REQUIRE_GPIOLIB
359 select GENERIC_CLOCKEVENTS
360 select USB_ARCH_HAS_EHCI
362 Support for systems based on the Freescale 3xxx CPUs.
365 bool "Hilscher NetX based"
368 select GENERIC_CLOCKEVENTS
371 This enables support for systems based on the Hilscher NetX Soc
374 bool "Hynix HMS720x-based"
377 select ARCH_USES_GETTIMEOFFSET
379 This enables support for systems based on the Hynix HMS720x
387 select ARCH_SUPPORTS_MSI
390 Support for Intel's IOP13XX (XScale) family of processors.
398 select ARCH_REQUIRE_GPIOLIB
400 Support for Intel's 80219 and IOP32X (XScale) family of
409 select ARCH_REQUIRE_GPIOLIB
411 Support for Intel's IOP33X (XScale) family of processors.
418 select ARCH_USES_GETTIMEOFFSET
420 Support for Intel's IXP23xx (XScale) family of processors.
423 bool "IXP2400/2800-based"
427 select ARCH_USES_GETTIMEOFFSET
429 Support for Intel's IXP2400/2800 (XScale) family of processors.
437 select GENERIC_CLOCKEVENTS
438 select DMABOUNCE if PCI
440 Support for Intel's IXP4XX (XScale) family of processors.
446 select ARCH_USES_GETTIMEOFFSET
448 Say Y here if you intend to run this kernel on a LinkUp Systems
449 L7200 Software Development Board which uses an ARM720T processor.
450 Information on this board can be obtained at:
452 <http://www.linkupsys.com/>
454 If you have any questions or comments about the Linux kernel port
455 to this board, send e-mail to <sjhill@cotw.com>.
460 select ARCH_REQUIRE_GPIOLIB
462 select GENERIC_CLOCKEVENTS
465 Support for the Marvell Dove SoC 88AP510
468 bool "Marvell Kirkwood"
471 select ARCH_REQUIRE_GPIOLIB
473 select GENERIC_CLOCKEVENTS
476 Support for the following Marvell Kirkwood series SoCs:
477 88F6180, 88F6192 and 88F6281.
480 bool "Marvell Loki (88RC8480)"
483 select GENERIC_CLOCKEVENTS
486 Support for the Marvell Loki (88RC8480) SoC.
489 bool "Marvell MV78xx0"
492 select ARCH_REQUIRE_GPIOLIB
494 select GENERIC_CLOCKEVENTS
497 Support for the following Marvell MV78xx0 series SoCs:
505 select ARCH_REQUIRE_GPIOLIB
507 select GENERIC_CLOCKEVENTS
510 Support for the following Marvell Orion 5x series SoCs:
511 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
512 Orion-2 (5281), Orion-1-90 (6183).
515 bool "Marvell PXA168/910/MMP2"
517 select ARCH_REQUIRE_GPIOLIB
520 select GENERIC_CLOCKEVENTS
524 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
527 bool "Micrel/Kendin KS8695"
529 select ARCH_REQUIRE_GPIOLIB
530 select ARCH_USES_GETTIMEOFFSET
532 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
533 System-on-Chip devices.
536 bool "NetSilicon NS9xxx"
540 select GENERIC_CLOCKEVENTS
543 Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
546 <http://www.digi.com/products/microprocessors/index.jsp>
549 bool "Nuvoton W90X900 CPU"
551 select ARCH_REQUIRE_GPIOLIB
554 select GENERIC_CLOCKEVENTS
556 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
557 At present, the w90x900 has been renamed nuc900, regarding
558 the ARM series product line, you can login the following
559 link address to know more.
561 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
562 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
565 bool "Nuvoton NUC93X CPU"
569 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
570 low-power and high performance MPEG-4/JPEG multimedia controller chip.
573 bool "Philips Nexperia PNX4008 Mobile"
576 select ARCH_USES_GETTIMEOFFSET
578 This enables support for Philips PNX4008 mobile platform.
581 bool "PXA2xx/PXA3xx-based"
584 select ARCH_HAS_CPUFREQ
586 select ARCH_REQUIRE_GPIOLIB
588 select GENERIC_CLOCKEVENTS
592 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
598 select GENERIC_CLOCKEVENTS
600 Support for Qualcomm MSM7K based systems. This runs on the ARM11
601 apps processor of the MSM7K and depends on a shared memory
602 interface to the ARM9 modem processor which runs the baseband stack
603 and controls some vital subsystems (clock and power control, etc).
606 bool "Renesas SH-Mobile"
608 Support for Renesas's SH-Mobile ARM platforms
615 select ARCH_MAY_HAVE_PC_FDC
616 select HAVE_PATA_PLATFORM
619 select ARCH_SPARSEMEM_ENABLE
620 select ARCH_USES_GETTIMEOFFSET
622 On the Acorn Risc-PC, Linux can support the internal IDE disk and
623 CD-ROM interface, serial and parallel port, and the floppy drive.
629 select ARCH_SPARSEMEM_ENABLE
631 select ARCH_HAS_CPUFREQ
634 select GENERIC_CLOCKEVENTS
637 select ARCH_REQUIRE_GPIOLIB
639 Support for StrongARM 11x0 based boards.
642 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
644 select ARCH_HAS_CPUFREQ
646 select ARCH_USES_GETTIMEOFFSET
648 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
649 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
650 the Samsung SMDK2410 development board (and derivatives).
653 bool "Samsung S3C64XX"
659 select ARCH_USES_GETTIMEOFFSET
660 select ARCH_HAS_CPUFREQ
661 select ARCH_REQUIRE_GPIOLIB
662 select SAMSUNG_CLKSRC
663 select SAMSUNG_IRQ_VIC_TIMER
664 select SAMSUNG_IRQ_UART
665 select S3C_GPIO_TRACK
666 select S3C_GPIO_PULL_UPDOWN
667 select S3C_GPIO_CFG_S3C24XX
668 select S3C_GPIO_CFG_S3C64XX
670 select USB_ARCH_HAS_OHCI
671 select SAMSUNG_GPIOLIB_4BIT
673 Samsung S3C64XX series based systems
676 bool "Samsung S5P6440"
681 Samsung S5P6440 CPU based systems
684 bool "Samsung S5P6442"
689 Samsung S5P6442 CPU based systems
692 bool "Samsung S5PC1XX"
696 select ARM_L1_CACHE_SHIFT_6
698 Samsung S5PC1XX series based systems
701 bool "Samsung S5PV210/S5PC110"
705 select ARM_L1_CACHE_SHIFT_6
707 Samsung S5PV210/S5PC110 series based systems
716 select ARCH_USES_GETTIMEOFFSET
718 Support for the StrongARM based Digital DNARD machine, also known
719 as "Shark" (<http://www.shark-linux.de/shark.html>).
724 select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
725 select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
726 select ARCH_USES_GETTIMEOFFSET
728 Say Y here for systems based on one of the Sharp LH7A40X
729 System on a Chip processors. These CPUs include an ARM922T
730 core with a wide array of integrated devices for
731 hand-held and low-power applications.
734 bool "ST-Ericsson U300 Series"
741 select GENERIC_CLOCKEVENTS
745 Support for ST-Ericsson U300 series mobile platforms.
748 bool "ST-Ericsson U8500 Series"
752 select GENERIC_CLOCKEVENTS
754 select ARCH_REQUIRE_GPIOLIB
756 Support for ST-Ericsson's Ux500 architecture
759 bool "STMicroelectronics Nomadik"
765 select GENERIC_CLOCKEVENTS
766 select ARCH_REQUIRE_GPIOLIB
768 Support for the Nomadik platform by ST-Ericsson
774 select GENERIC_CLOCKEVENTS
775 select ARCH_REQUIRE_GPIOLIB
779 select GENERIC_ALLOCATOR
780 select ARCH_HAS_HOLES_MEMORYMODEL
782 Support for TI's DaVinci platform.
787 select ARCH_REQUIRE_GPIOLIB
788 select ARCH_HAS_CPUFREQ
790 select GENERIC_CLOCKEVENTS
791 select ARCH_HAS_HOLES_MEMORYMODEL
793 Support for TI's OMAP platform (OMAP1 and OMAP2).
798 select ARCH_REQUIRE_GPIOLIB
800 select GENERIC_CLOCKEVENTS
804 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
809 # This is sorted alphabetically by mach-* pathname. However, plat-*
810 # Kconfigs may be included either alphabetically (according to the
811 # plat- suffix) or along side the corresponding mach-* source.
813 source "arch/arm/mach-aaec2000/Kconfig"
815 source "arch/arm/mach-at91/Kconfig"
817 source "arch/arm/mach-bcmring/Kconfig"
819 source "arch/arm/mach-clps711x/Kconfig"
821 source "arch/arm/mach-davinci/Kconfig"
823 source "arch/arm/mach-dove/Kconfig"
825 source "arch/arm/mach-ep93xx/Kconfig"
827 source "arch/arm/mach-footbridge/Kconfig"
829 source "arch/arm/mach-gemini/Kconfig"
831 source "arch/arm/mach-h720x/Kconfig"
833 source "arch/arm/mach-integrator/Kconfig"
835 source "arch/arm/mach-iop32x/Kconfig"
837 source "arch/arm/mach-iop33x/Kconfig"
839 source "arch/arm/mach-iop13xx/Kconfig"
841 source "arch/arm/mach-ixp4xx/Kconfig"
843 source "arch/arm/mach-ixp2000/Kconfig"
845 source "arch/arm/mach-ixp23xx/Kconfig"
847 source "arch/arm/mach-kirkwood/Kconfig"
849 source "arch/arm/mach-ks8695/Kconfig"
851 source "arch/arm/mach-lh7a40x/Kconfig"
853 source "arch/arm/mach-loki/Kconfig"
855 source "arch/arm/mach-msm/Kconfig"
857 source "arch/arm/mach-mv78xx0/Kconfig"
859 source "arch/arm/plat-mxc/Kconfig"
861 source "arch/arm/mach-netx/Kconfig"
863 source "arch/arm/mach-nomadik/Kconfig"
864 source "arch/arm/plat-nomadik/Kconfig"
866 source "arch/arm/mach-ns9xxx/Kconfig"
868 source "arch/arm/mach-nuc93x/Kconfig"
870 source "arch/arm/plat-omap/Kconfig"
872 source "arch/arm/mach-omap1/Kconfig"
874 source "arch/arm/mach-omap2/Kconfig"
876 source "arch/arm/mach-orion5x/Kconfig"
878 source "arch/arm/mach-pxa/Kconfig"
879 source "arch/arm/plat-pxa/Kconfig"
881 source "arch/arm/mach-mmp/Kconfig"
883 source "arch/arm/mach-realview/Kconfig"
885 source "arch/arm/mach-sa1100/Kconfig"
887 source "arch/arm/plat-samsung/Kconfig"
888 source "arch/arm/plat-s3c24xx/Kconfig"
889 source "arch/arm/plat-s5p/Kconfig"
890 source "arch/arm/plat-s5pc1xx/Kconfig"
891 source "arch/arm/plat-spear/Kconfig"
894 source "arch/arm/mach-s3c2400/Kconfig"
895 source "arch/arm/mach-s3c2410/Kconfig"
896 source "arch/arm/mach-s3c2412/Kconfig"
897 source "arch/arm/mach-s3c2440/Kconfig"
898 source "arch/arm/mach-s3c2443/Kconfig"
902 source "arch/arm/mach-s3c64xx/Kconfig"
905 source "arch/arm/mach-s5p6440/Kconfig"
907 source "arch/arm/mach-s5p6442/Kconfig"
910 source "arch/arm/mach-s5pc100/Kconfig"
913 source "arch/arm/mach-s5pv210/Kconfig"
915 source "arch/arm/mach-shmobile/Kconfig"
917 source "arch/arm/plat-stmp3xxx/Kconfig"
919 source "arch/arm/mach-u300/Kconfig"
921 source "arch/arm/mach-ux500/Kconfig"
923 source "arch/arm/mach-versatile/Kconfig"
925 source "arch/arm/mach-vexpress/Kconfig"
927 source "arch/arm/mach-w90x900/Kconfig"
929 # Definitions to make life easier
935 select GENERIC_CLOCKEVENTS
944 config PLAT_VERSATILE
947 config ARM_TIMER_SP804
950 source arch/arm/mm/Kconfig
953 bool "Enable iWMMXt support"
954 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
955 default y if PXA27x || PXA3xx || ARCH_MMP
957 Enable support for iWMMXt context switching at run time if
958 running on a CPU that supports it.
960 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
963 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
967 depends on CPU_V6 || CPU_V7 || XSCALE_PMU
972 source "arch/arm/Kconfig-nommu"
975 config ARM_ERRATA_411920
976 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
977 depends on CPU_V6 && !SMP
979 Invalidation of the Instruction Cache operation can
980 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
981 It does not affect the MPCore. This option enables the ARM Ltd.
982 recommended workaround.
984 config ARM_ERRATA_430973
985 bool "ARM errata: Stale prediction on replaced interworking branch"
988 This option enables the workaround for the 430973 Cortex-A8
989 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
990 interworking branch is replaced with another code sequence at the
991 same virtual address, whether due to self-modifying code or virtual
992 to physical address re-mapping, Cortex-A8 does not recover from the
993 stale interworking branch prediction. This results in Cortex-A8
994 executing the new code sequence in the incorrect ARM or Thumb state.
995 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
996 and also flushes the branch target cache at every context switch.
997 Note that setting specific bits in the ACTLR register may not be
998 available in non-secure mode.
1000 config ARM_ERRATA_458693
1001 bool "ARM errata: Processor deadlock when a false hazard is created"
1004 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1005 erratum. For very specific sequences of memory operations, it is
1006 possible for a hazard condition intended for a cache line to instead
1007 be incorrectly associated with a different cache line. This false
1008 hazard might then cause a processor deadlock. The workaround enables
1009 the L1 caching of the NEON accesses and disables the PLD instruction
1010 in the ACTLR register. Note that setting specific bits in the ACTLR
1011 register may not be available in non-secure mode.
1013 config ARM_ERRATA_460075
1014 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1017 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1018 erratum. Any asynchronous access to the L2 cache may encounter a
1019 situation in which recent store transactions to the L2 cache are lost
1020 and overwritten with stale memory contents from external memory. The
1021 workaround disables the write-allocate mode for the L2 cache via the
1022 ACTLR register. Note that setting specific bits in the ACTLR register
1023 may not be available in non-secure mode.
1025 config PL310_ERRATA_588369
1026 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1027 depends on CACHE_L2X0 && ARCH_OMAP4
1029 The PL310 L2 cache controller implements three types of Clean &
1030 Invalidate maintenance operations: by Physical Address
1031 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1032 They are architecturally defined to behave as the execution of a
1033 clean operation followed immediately by an invalidate operation,
1034 both performing to the same memory location. This functionality
1035 is not correctly implemented in PL310 as clean lines are not
1036 invalidated as a result of these operations. Note that this errata
1037 uses Texas Instrument's secure monitor api.
1040 source "arch/arm/common/Kconfig"
1042 config FORCE_MAX_ZONEORDER
1055 Find out whether you have ISA slots on your motherboard. ISA is the
1056 name of a bus system, i.e. the way the CPU talks to the other stuff
1057 inside your box. Other bus systems are PCI, EISA, MicroChannel
1058 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1059 newer boards don't support it. If you have ISA, say Y, otherwise N.
1061 # Select ISA DMA controller support
1066 # Select ISA DMA interface
1071 bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
1073 Find out whether you have a PCI motherboard. PCI is the name of a
1074 bus system, i.e. the way the CPU talks to the other stuff inside
1075 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1076 VESA. If you have PCI, say Y, otherwise N.
1085 # Select the host bridge type
1086 config PCI_HOST_VIA82C505
1088 depends on PCI && ARCH_SHARK
1091 config PCI_HOST_ITE8152
1093 depends on PCI && MACH_ARMCORE
1097 source "drivers/pci/Kconfig"
1099 source "drivers/pcmcia/Kconfig"
1103 menu "Kernel Features"
1105 source "kernel/time/Kconfig"
1108 bool "Symmetric Multi-Processing (EXPERIMENTAL)"
1109 depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
1110 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
1111 ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1112 depends on GENERIC_CLOCKEVENTS
1113 select USE_GENERIC_SMP_HELPERS
1114 select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
1116 This enables support for systems with more than one CPU. If you have
1117 a system with only one CPU, like most personal computers, say N. If
1118 you have a system with more than one CPU, say Y.
1120 If you say N here, the kernel will run on single and multiprocessor
1121 machines, but will use only one CPU of a multiprocessor machine. If
1122 you say Y here, the kernel will run on many, but not all, single
1123 processor machines. On a single processor machine, the kernel will
1124 run faster if you say N here.
1126 See also <file:Documentation/i386/IO-APIC.txt>,
1127 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1128 <http://www.linuxdoc.org/docs.html#howto>.
1130 If you don't know what to do here, say N.
1136 This option enables support for the ARM system coherency unit
1142 This options enables support for the ARM timer and watchdog unit
1145 prompt "Memory split"
1148 Select the desired split between kernel and user memory.
1150 If you are not absolutely sure what you are doing, leave this
1154 bool "3G/1G user/kernel split"
1156 bool "2G/2G user/kernel split"
1158 bool "1G/3G user/kernel split"
1163 default 0x40000000 if VMSPLIT_1G
1164 default 0x80000000 if VMSPLIT_2G
1168 int "Maximum number of CPUs (2-32)"
1174 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1175 depends on SMP && HOTPLUG && EXPERIMENTAL
1177 Say Y here to experiment with turning CPUs off and on. CPUs
1178 can be controlled through /sys/devices/system/cpu.
1181 bool "Use local timer interrupts"
1182 depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
1183 REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
1185 select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
1187 Enable support for local timers on SMP platforms, rather then the
1188 legacy IPI broadcast method. Local timers allows the system
1189 accounting to be spread across the timer interval, preventing a
1190 "thundering herd" at every timer tick.
1192 source kernel/Kconfig.preempt
1196 default 128 if ARCH_L7200
1197 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
1198 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1199 default AT91_TIMER_HZ if ARCH_AT91
1202 config THUMB2_KERNEL
1203 bool "Compile the kernel in Thumb-2 mode"
1204 depends on CPU_V7 && EXPERIMENTAL
1206 select ARM_ASM_UNIFIED
1208 By enabling this option, the kernel will be compiled in
1209 Thumb-2 mode. A compiler/assembler that understand the unified
1210 ARM-Thumb syntax is needed.
1214 config ARM_ASM_UNIFIED
1218 bool "Use the ARM EABI to compile the kernel"
1220 This option allows for the kernel to be compiled using the latest
1221 ARM ABI (aka EABI). This is only useful if you are using a user
1222 space environment that is also compiled with EABI.
1224 Since there are major incompatibilities between the legacy ABI and
1225 EABI, especially with regard to structure member alignment, this
1226 option also changes the kernel syscall calling convention to
1227 disambiguate both ABIs and allow for backward compatibility support
1228 (selected with CONFIG_OABI_COMPAT).
1230 To use this you need GCC version 4.0.0 or later.
1233 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1234 depends on AEABI && EXPERIMENTAL
1237 This option preserves the old syscall interface along with the
1238 new (ARM EABI) one. It also provides a compatibility layer to
1239 intercept syscalls that have structure arguments which layout
1240 in memory differs between the legacy ABI and the new ARM EABI
1241 (only for non "thumb" binaries). This option adds a tiny
1242 overhead to all syscalls and produces a slightly larger kernel.
1243 If you know you'll be using only pure EABI user space then you
1244 can say N here. If this option is not selected and you attempt
1245 to execute a legacy ABI binary then the result will be
1246 UNPREDICTABLE (in fact it can be predicted that it won't work
1247 at all). If in doubt say Y.
1249 config ARCH_HAS_HOLES_MEMORYMODEL
1252 # Discontigmem is deprecated
1253 config ARCH_DISCONTIGMEM_ENABLE
1256 config ARCH_SPARSEMEM_ENABLE
1259 config ARCH_SPARSEMEM_DEFAULT
1260 def_bool ARCH_SPARSEMEM_ENABLE
1262 config ARCH_SELECT_MEMORY_MODEL
1263 def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
1267 default "4" if ARCH_LH7A40X
1269 depends on NEED_MULTIPLE_NODES
1272 bool "High Memory Support (EXPERIMENTAL)"
1273 depends on MMU && EXPERIMENTAL
1275 The address space of ARM processors is only 4 Gigabytes large
1276 and it has to accommodate user address space, kernel address
1277 space as well as some memory mapped IO. That means that, if you
1278 have a large amount of physical memory and/or IO, not all of the
1279 memory can be "permanently mapped" by the kernel. The physical
1280 memory that is not permanently mapped is called "high memory".
1282 Depending on the selected kernel/user memory split, minimum
1283 vmalloc space and actual amount of RAM, you may not need this
1284 option which should result in a slightly faster kernel.
1289 bool "Allocate 2nd-level pagetables from highmem"
1291 depends on !OUTER_CACHE
1293 config HW_PERF_EVENTS
1294 bool "Enable hardware performance counter support for perf events"
1295 depends on PERF_EVENTS && CPU_HAS_PMU
1298 Enable hardware performance counter support for perf events. If
1299 disabled, perf events will use software events only.
1304 bool "Timer and CPU usage LEDs"
1305 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1306 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1307 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1308 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1309 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1310 ARCH_AT91 || ARCH_DAVINCI || \
1311 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1313 If you say Y here, the LEDs on your machine will be used
1314 to provide useful information about your current system status.
1316 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1317 be able to select which LEDs are active using the options below. If
1318 you are compiling a kernel for the EBSA-110 or the LART however, the
1319 red LED will simply flash regularly to indicate that the system is
1320 still functional. It is safe to say Y here if you have a CATS
1321 system, but the driver will do nothing.
1324 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1325 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1326 || MACH_OMAP_PERSEUS2
1328 depends on !GENERIC_CLOCKEVENTS
1329 default y if ARCH_EBSA110
1331 If you say Y here, one of the system LEDs (the green one on the
1332 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1333 will flash regularly to indicate that the system is still
1334 operational. This is mainly useful to kernel hackers who are
1335 debugging unstable kernels.
1337 The LART uses the same LED for both Timer LED and CPU usage LED
1338 functions. You may choose to use both, but the Timer LED function
1339 will overrule the CPU usage LED.
1342 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1344 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1345 || MACH_OMAP_PERSEUS2
1348 If you say Y here, the red LED will be used to give a good real
1349 time indication of CPU usage, by lighting whenever the idle task
1350 is not currently executing.
1352 The LART uses the same LED for both Timer LED and CPU usage LED
1353 functions. You may choose to use both, but the Timer LED function
1354 will overrule the CPU usage LED.
1356 config ALIGNMENT_TRAP
1358 depends on CPU_CP15_MMU
1359 default y if !ARCH_EBSA110
1360 select HAVE_PROC_CPU if PROC_FS
1362 ARM processors cannot fetch/store information which is not
1363 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1364 address divisible by 4. On 32-bit ARM processors, these non-aligned
1365 fetch/store instructions will be emulated in software if you say
1366 here, which has a severe performance impact. This is necessary for
1367 correct operation of some network protocols. With an IP-only
1368 configuration it is safe to say N, otherwise say Y.
1370 config UACCESS_WITH_MEMCPY
1371 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1372 depends on MMU && EXPERIMENTAL
1373 default y if CPU_FEROCEON
1375 Implement faster copy_to_user and clear_user methods for CPU
1376 cores where a 8-word STM instruction give significantly higher
1377 memory write throughput than a sequence of individual 32bit stores.
1379 A possible side effect is a slight increase in scheduling latency
1380 between threads sharing the same address space if they invoke
1381 such copy operations with large buffers.
1383 However, if the CPU data cache is using a write-allocate mode,
1384 this option is unlikely to provide any performance gain.
1390 # Compressed boot loader in ROM. Yes, we really want to ask about
1391 # TEXT and BSS so we preserve their values in the config files.
1392 config ZBOOT_ROM_TEXT
1393 hex "Compressed ROM boot loader base address"
1396 The physical address at which the ROM-able zImage is to be
1397 placed in the target. Platforms which normally make use of
1398 ROM-able zImage formats normally set this to a suitable
1399 value in their defconfig file.
1401 If ZBOOT_ROM is not enabled, this has no effect.
1403 config ZBOOT_ROM_BSS
1404 hex "Compressed ROM boot loader BSS address"
1407 The base address of an area of read/write memory in the target
1408 for the ROM-able zImage which must be available while the
1409 decompressor is running. It must be large enough to hold the
1410 entire decompressed kernel plus an additional 128 KiB.
1411 Platforms which normally make use of ROM-able zImage formats
1412 normally set this to a suitable value in their defconfig file.
1414 If ZBOOT_ROM is not enabled, this has no effect.
1417 bool "Compressed boot loader in ROM/flash"
1418 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1420 Say Y here if you intend to execute your compressed kernel image
1421 (zImage) directly from ROM or flash. If unsure, say N.
1424 string "Default kernel command string"
1427 On some architectures (EBSA110 and CATS), there is currently no way
1428 for the boot loader to pass arguments to the kernel. For these
1429 architectures, you should supply some command-line options at build
1430 time by entering them here. As a minimum, you should specify the
1431 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1434 bool "Kernel Execute-In-Place from ROM"
1435 depends on !ZBOOT_ROM
1437 Execute-In-Place allows the kernel to run from non-volatile storage
1438 directly addressable by the CPU, such as NOR flash. This saves RAM
1439 space since the text section of the kernel is not loaded from flash
1440 to RAM. Read-write sections, such as the data section and stack,
1441 are still copied to RAM. The XIP kernel is not compressed since
1442 it has to run directly from flash, so it will take more space to
1443 store it. The flash address used to link the kernel object files,
1444 and for storing it, is configuration dependent. Therefore, if you
1445 say Y here, you must know the proper physical address where to
1446 store the kernel image depending on your own flash memory usage.
1448 Also note that the make target becomes "make xipImage" rather than
1449 "make zImage" or "make Image". The final kernel binary to put in
1450 ROM memory will be arch/arm/boot/xipImage.
1454 config XIP_PHYS_ADDR
1455 hex "XIP Kernel Physical Location"
1456 depends on XIP_KERNEL
1457 default "0x00080000"
1459 This is the physical address in your flash memory the kernel will
1460 be linked for and stored to. This address is dependent on your
1464 bool "Kexec system call (EXPERIMENTAL)"
1465 depends on EXPERIMENTAL
1467 kexec is a system call that implements the ability to shutdown your
1468 current kernel, and to start another kernel. It is like a reboot
1469 but it is independent of the system firmware. And like a reboot
1470 you can start any kernel with it, not just Linux.
1472 It is an ongoing process to be certain the hardware in a machine
1473 is properly shutdown, so do not be surprised if this code does not
1474 initially work for you. It may help to enable device hotplugging
1478 bool "Export atags in procfs"
1482 Should the atags used to boot the kernel be exported in an "atags"
1483 file in procfs. Useful with kexec.
1487 menu "CPU Power Management"
1491 source "drivers/cpufreq/Kconfig"
1493 config CPU_FREQ_SA1100
1496 config CPU_FREQ_SA1110
1499 config CPU_FREQ_INTEGRATOR
1500 tristate "CPUfreq driver for ARM Integrator CPUs"
1501 depends on ARCH_INTEGRATOR && CPU_FREQ
1504 This enables the CPUfreq driver for ARM Integrator CPUs.
1506 For details, take a look at <file:Documentation/cpu-freq>.
1512 depends on CPU_FREQ && ARCH_PXA && PXA25x
1514 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1516 config CPU_FREQ_S3C64XX
1517 bool "CPUfreq support for Samsung S3C64XX CPUs"
1518 depends on CPU_FREQ && CPU_S3C6410
1523 Internal configuration node for common cpufreq on Samsung SoC
1525 config CPU_FREQ_S3C24XX
1526 bool "CPUfreq driver for Samsung S3C24XX series CPUs"
1527 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1530 This enables the CPUfreq driver for the Samsung S3C24XX family
1533 For details, take a look at <file:Documentation/cpu-freq>.
1537 config CPU_FREQ_S3C24XX_PLL
1538 bool "Support CPUfreq changing of PLL frequency"
1539 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1541 Compile in support for changing the PLL frequency from the
1542 S3C24XX series CPUfreq driver. The PLL takes time to settle
1543 after a frequency change, so by default it is not enabled.
1545 This also means that the PLL tables for the selected CPU(s) will
1546 be built which may increase the size of the kernel image.
1548 config CPU_FREQ_S3C24XX_DEBUG
1549 bool "Debug CPUfreq Samsung driver core"
1550 depends on CPU_FREQ_S3C24XX
1552 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1554 config CPU_FREQ_S3C24XX_IODEBUG
1555 bool "Debug CPUfreq Samsung driver IO timing"
1556 depends on CPU_FREQ_S3C24XX
1558 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1560 config CPU_FREQ_S3C24XX_DEBUGFS
1561 bool "Export debugfs for CPUFreq"
1562 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1564 Export status information via debugfs.
1568 source "drivers/cpuidle/Kconfig"
1572 menu "Floating point emulation"
1574 comment "At least one emulation must be selected"
1577 bool "NWFPE math emulation"
1578 depends on !AEABI || OABI_COMPAT
1580 Say Y to include the NWFPE floating point emulator in the kernel.
1581 This is necessary to run most binaries. Linux does not currently
1582 support floating point hardware so you need to say Y here even if
1583 your machine has an FPA or floating point co-processor podule.
1585 You may say N here if you are going to load the Acorn FPEmulator
1586 early in the bootup.
1589 bool "Support extended precision"
1590 depends on FPE_NWFPE
1592 Say Y to include 80-bit support in the kernel floating-point
1593 emulator. Otherwise, only 32 and 64-bit support is compiled in.
1594 Note that gcc does not generate 80-bit operations by default,
1595 so in most cases this option only enlarges the size of the
1596 floating point emulator without any good reason.
1598 You almost surely want to say N here.
1601 bool "FastFPE math emulation (EXPERIMENTAL)"
1602 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
1604 Say Y here to include the FAST floating point emulator in the kernel.
1605 This is an experimental much faster emulator which now also has full
1606 precision for the mantissa. It does not support any exceptions.
1607 It is very simple, and approximately 3-6 times faster than NWFPE.
1609 It should be sufficient for most programs. It may be not suitable
1610 for scientific calculations, but you have to check this for yourself.
1611 If you do not feel you need a faster FP emulation you should better
1615 bool "VFP-format floating point maths"
1616 depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1618 Say Y to include VFP support code in the kernel. This is needed
1619 if your hardware includes a VFP unit.
1621 Please see <file:Documentation/arm/VFP/release-notes.txt> for
1622 release notes and additional status information.
1624 Say N if your target does not have VFP hardware.
1632 bool "Advanced SIMD (NEON) Extension support"
1633 depends on VFPv3 && CPU_V7
1635 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
1640 menu "Userspace binary formats"
1642 source "fs/Kconfig.binfmt"
1645 tristate "RISC OS personality"
1648 Say Y here to include the kernel code necessary if you want to run
1649 Acorn RISC OS/Arthur binaries under Linux. This code is still very
1650 experimental; if this sounds frightening, say N and sleep in peace.
1651 You can also say M here to compile this support as a module (which
1652 will be called arthur).
1656 menu "Power management options"
1658 source "kernel/power/Kconfig"
1660 config ARCH_SUSPEND_POSSIBLE
1665 source "net/Kconfig"
1667 source "drivers/Kconfig"
1671 source "arch/arm/Kconfig.debug"
1673 source "security/Kconfig"
1675 source "crypto/Kconfig"
1677 source "lib/Kconfig"