5 select HAVE_DMA_API_DEBUG
6 select HAVE_IDE if PCI || ISA || PCMCIA
9 select SYS_SUPPORTS_APM_EMULATION
10 select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
11 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
12 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
14 select HAVE_ARCH_TRACEHOOK
15 select HAVE_KPROBES if !XIP_KERNEL
16 select HAVE_KRETPROBES if (HAVE_KPROBES)
17 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
18 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
19 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
20 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
21 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
22 select HAVE_GENERIC_DMA_COHERENT
23 select HAVE_KERNEL_GZIP
24 select HAVE_KERNEL_LZO
25 select HAVE_KERNEL_LZMA
28 select HAVE_PERF_EVENTS
29 select PERF_USE_VMALLOC
30 select HAVE_REGS_AND_STACK_ACCESS_API
31 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
32 select HAVE_C_RECORDMCOUNT
33 select HAVE_GENERIC_HARDIRQS
34 select HARDIRQS_SW_RESEND
35 select GENERIC_IRQ_PROBE
36 select GENERIC_IRQ_SHOW
37 select GENERIC_IRQ_PROBE
38 select HARDIRQS_SW_RESEND
39 select CPU_PM if (SUSPEND || CPU_IDLE)
40 select GENERIC_PCI_IOMAP
42 select GENERIC_SMP_IDLE_THREAD
44 The ARM series is a line of low-power-consumption RISC chip designs
45 licensed by ARM Ltd and targeted at embedded applications and
46 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
47 manufactured, but legacy ARM-based PC hardware remains popular in
48 Europe. There is an ARM Linux project with a web page at
49 <http://www.arm.linux.org.uk/>.
51 config ARM_HAS_SG_CHAIN
60 config SYS_SUPPORTS_APM_EMULATION
66 config ARCH_USES_GETTIMEOFFSET
70 config GENERIC_CLOCKEVENTS
73 config GENERIC_CLOCKEVENTS_BROADCAST
75 depends on GENERIC_CLOCKEVENTS
84 select GENERIC_ALLOCATOR
95 The Extended Industry Standard Architecture (EISA) bus was
96 developed as an open alternative to the IBM MicroChannel bus.
98 The EISA bus provided some of the features of the IBM MicroChannel
99 bus while maintaining backward compatibility with cards made for
100 the older ISA bus. The EISA bus saw limited use between 1988 and
101 1995 when it was made obsolete by the PCI bus.
103 Say Y here if you are building a kernel for an EISA-based machine.
113 MicroChannel Architecture is found in some IBM PS/2 machines and
114 laptops. It is a bus system similar to PCI or ISA. See
115 <file:Documentation/mca.txt> (and especially the web page given
116 there) before attempting to build an MCA bus kernel.
118 config STACKTRACE_SUPPORT
122 config HAVE_LATENCYTOP_SUPPORT
127 config LOCKDEP_SUPPORT
131 config TRACE_IRQFLAGS_SUPPORT
135 config GENERIC_LOCKBREAK
138 depends on SMP && PREEMPT
140 config RWSEM_GENERIC_SPINLOCK
144 config RWSEM_XCHGADD_ALGORITHM
147 config ARCH_HAS_ILOG2_U32
150 config ARCH_HAS_ILOG2_U64
153 config ARCH_HAS_CPUFREQ
156 Internal node to signify that the ARCH has CPUFREQ support
157 and that the relevant menu configurations are displayed for
160 config GENERIC_HWEIGHT
164 config GENERIC_CALIBRATE_DELAY
168 config ARCH_MAY_HAVE_PC_FDC
174 config NEED_DMA_MAP_STATE
177 config ARCH_HAS_DMA_SET_COHERENT_MASK
180 config GENERIC_ISA_DMA
186 config NEED_RET_TO_USER
194 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
195 default DRAM_BASE if REMAP_VECTORS_TO_RAM
198 The base address of exception vectors.
200 config ARM_PATCH_PHYS_VIRT
201 bool "Patch physical to virtual translations at runtime" if EMBEDDED
203 depends on !XIP_KERNEL && MMU
204 depends on !ARCH_REALVIEW || !SPARSEMEM
206 Patch phys-to-virt and virt-to-phys translation functions at
207 boot and module load time according to the position of the
208 kernel in system memory.
210 This can only be used with non-XIP MMU kernels where the base
211 of physical memory is at a 16MB boundary.
213 Only disable this option if you know that you do not require
214 this feature (eg, building a kernel for a single machine) and
215 you need to shrink the kernel to the minimal size.
217 config NEED_MACH_IO_H
220 Select this when mach/io.h is required to provide special
221 definitions for this platform. The need for mach/io.h should
222 be avoided when possible.
224 config NEED_MACH_MEMORY_H
227 Select this when mach/memory.h is required to provide special
228 definitions for this platform. The need for mach/memory.h should
229 be avoided when possible.
232 hex "Physical address of main memory" if MMU
233 depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
234 default DRAM_BASE if !MMU
236 Please provide the physical address corresponding to the
237 location of main memory in your system.
243 source "init/Kconfig"
245 source "kernel/Kconfig.freezer"
250 bool "MMU-based Paged Memory Management Support"
253 Select if you want MMU-based virtualised addressing space
254 support by paged memory management. If unsure, say 'Y'.
257 # The "ARM system type" choice list is ordered alphabetically by option
258 # text. Please add new entries in the option alphabetic order.
261 prompt "ARM system type"
262 default ARCH_VERSATILE
264 config ARCH_INTEGRATOR
265 bool "ARM Ltd. Integrator family"
267 select ARCH_HAS_CPUFREQ
269 select HAVE_MACH_CLKDEV
272 select GENERIC_CLOCKEVENTS
273 select PLAT_VERSATILE
274 select PLAT_VERSATILE_FPGA_IRQ
275 select NEED_MACH_IO_H
276 select NEED_MACH_MEMORY_H
278 select MULTI_IRQ_HANDLER
280 Support for ARM's Integrator platform.
283 bool "ARM Ltd. RealView family"
286 select HAVE_MACH_CLKDEV
288 select GENERIC_CLOCKEVENTS
289 select ARCH_WANT_OPTIONAL_GPIOLIB
290 select PLAT_VERSATILE
291 select PLAT_VERSATILE_CLCD
292 select ARM_TIMER_SP804
293 select GPIO_PL061 if GPIOLIB
294 select NEED_MACH_MEMORY_H
296 This enables support for ARM Ltd RealView boards.
298 config ARCH_VERSATILE
299 bool "ARM Ltd. Versatile family"
303 select HAVE_MACH_CLKDEV
305 select GENERIC_CLOCKEVENTS
306 select ARCH_WANT_OPTIONAL_GPIOLIB
307 select PLAT_VERSATILE
308 select PLAT_VERSATILE_CLCD
309 select PLAT_VERSATILE_FPGA_IRQ
310 select ARM_TIMER_SP804
312 This enables support for ARM Ltd Versatile board.
315 bool "ARM Ltd. Versatile Express family"
316 select ARCH_WANT_OPTIONAL_GPIOLIB
318 select ARM_TIMER_SP804
320 select HAVE_MACH_CLKDEV
321 select GENERIC_CLOCKEVENTS
323 select HAVE_PATA_PLATFORM
326 select PLAT_VERSATILE
327 select PLAT_VERSATILE_CLCD
329 This enables support for the ARM Ltd Versatile Express boards.
333 select ARCH_REQUIRE_GPIOLIB
337 select NEED_MACH_IO_H if PCCARD
339 This enables support for systems based on the Atmel AT91RM9200,
343 bool "Broadcom BCMRING"
347 select ARM_TIMER_SP804
349 select GENERIC_CLOCKEVENTS
350 select ARCH_WANT_OPTIONAL_GPIOLIB
352 Support for Broadcom's BCMRing platform.
355 bool "Calxeda Highbank-based"
356 select ARCH_WANT_OPTIONAL_GPIOLIB
359 select ARM_TIMER_SP804
363 select GENERIC_CLOCKEVENTS
369 Support for the Calxeda Highbank SoC based boards.
372 bool "Cirrus Logic CLPS711x/EP721x-based"
374 select ARCH_USES_GETTIMEOFFSET
375 select NEED_MACH_MEMORY_H
377 Support for Cirrus Logic 711x/721x based boards.
380 bool "Cavium Networks CNS3XXX family"
382 select GENERIC_CLOCKEVENTS
384 select MIGHT_HAVE_CACHE_L2X0
385 select MIGHT_HAVE_PCI
386 select PCI_DOMAINS if PCI
388 Support for Cavium Networks CNS3XXX platform.
391 bool "Cortina Systems Gemini"
393 select ARCH_REQUIRE_GPIOLIB
394 select ARCH_USES_GETTIMEOFFSET
396 Support for the Cortina Systems Gemini family SoCs
399 bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
402 select GENERIC_CLOCKEVENTS
404 select GENERIC_IRQ_CHIP
405 select MIGHT_HAVE_CACHE_L2X0
409 Support for CSR SiRFSoC ARM Cortex A9 Platform
416 select ARCH_USES_GETTIMEOFFSET
417 select NEED_MACH_IO_H
418 select NEED_MACH_MEMORY_H
420 This is an evaluation board for the StrongARM processor available
421 from Digital. It has limited hardware on-board, including an
422 Ethernet interface, two PCMCIA sockets, two serial ports and a
431 select ARCH_REQUIRE_GPIOLIB
432 select ARCH_HAS_HOLES_MEMORYMODEL
433 select ARCH_USES_GETTIMEOFFSET
434 select NEED_MACH_MEMORY_H
436 This enables support for the Cirrus EP93xx series of CPUs.
438 config ARCH_FOOTBRIDGE
442 select GENERIC_CLOCKEVENTS
444 select NEED_MACH_IO_H
445 select NEED_MACH_MEMORY_H
447 Support for systems based on the DC21285 companion chip
448 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
451 bool "Freescale MXC/iMX-based"
452 select GENERIC_CLOCKEVENTS
453 select ARCH_REQUIRE_GPIOLIB
456 select GENERIC_IRQ_CHIP
457 select MULTI_IRQ_HANDLER
459 Support for Freescale MXC/iMX-based family of processors
462 bool "Freescale MXS-based"
463 select GENERIC_CLOCKEVENTS
464 select ARCH_REQUIRE_GPIOLIB
467 select HAVE_CLK_PREPARE
469 Support for Freescale MXS-based family of processors
472 bool "Hilscher NetX based"
476 select GENERIC_CLOCKEVENTS
478 This enables support for systems based on the Hilscher NetX Soc
481 bool "Hynix HMS720x-based"
484 select ARCH_USES_GETTIMEOFFSET
486 This enables support for systems based on the Hynix HMS720x
494 select ARCH_SUPPORTS_MSI
496 select NEED_MACH_IO_H
497 select NEED_MACH_MEMORY_H
498 select NEED_RET_TO_USER
500 Support for Intel's IOP13XX (XScale) family of processors.
506 select NEED_MACH_IO_H
507 select NEED_RET_TO_USER
510 select ARCH_REQUIRE_GPIOLIB
512 Support for Intel's 80219 and IOP32X (XScale) family of
519 select NEED_MACH_IO_H
520 select NEED_RET_TO_USER
523 select ARCH_REQUIRE_GPIOLIB
525 Support for Intel's IOP33X (XScale) family of processors.
532 select ARCH_USES_GETTIMEOFFSET
533 select NEED_MACH_IO_H
534 select NEED_MACH_MEMORY_H
536 Support for Intel's IXP23xx (XScale) family of processors.
539 bool "IXP2400/2800-based"
543 select ARCH_USES_GETTIMEOFFSET
544 select NEED_MACH_IO_H
545 select NEED_MACH_MEMORY_H
547 Support for Intel's IXP2400/2800 (XScale) family of processors.
552 select ARCH_HAS_DMA_SET_COHERENT_MASK
556 select GENERIC_CLOCKEVENTS
557 select MIGHT_HAVE_PCI
558 select NEED_MACH_IO_H
559 select DMABOUNCE if PCI
561 Support for Intel's IXP4XX (XScale) family of processors.
567 select ARCH_REQUIRE_GPIOLIB
568 select GENERIC_CLOCKEVENTS
569 select NEED_MACH_IO_H
572 Support for the Marvell Dove SoC 88AP510
575 bool "Marvell Kirkwood"
578 select ARCH_REQUIRE_GPIOLIB
579 select GENERIC_CLOCKEVENTS
580 select NEED_MACH_IO_H
583 Support for the following Marvell Kirkwood series SoCs:
584 88F6180, 88F6192 and 88F6281.
590 select ARCH_REQUIRE_GPIOLIB
593 select USB_ARCH_HAS_OHCI
595 select GENERIC_CLOCKEVENTS
597 Support for the NXP LPC32XX family of processors
600 bool "Marvell MV78xx0"
603 select ARCH_REQUIRE_GPIOLIB
604 select GENERIC_CLOCKEVENTS
605 select NEED_MACH_IO_H
608 Support for the following Marvell MV78xx0 series SoCs:
616 select ARCH_REQUIRE_GPIOLIB
617 select GENERIC_CLOCKEVENTS
620 Support for the following Marvell Orion 5x series SoCs:
621 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
622 Orion-2 (5281), Orion-1-90 (6183).
625 bool "Marvell PXA168/910/MMP2"
627 select ARCH_REQUIRE_GPIOLIB
629 select GENERIC_CLOCKEVENTS
633 select GENERIC_ALLOCATOR
635 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
638 bool "Micrel/Kendin KS8695"
640 select ARCH_REQUIRE_GPIOLIB
641 select ARCH_USES_GETTIMEOFFSET
642 select NEED_MACH_MEMORY_H
644 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
645 System-on-Chip devices.
648 bool "Nuvoton W90X900 CPU"
650 select ARCH_REQUIRE_GPIOLIB
653 select GENERIC_CLOCKEVENTS
655 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
656 At present, the w90x900 has been renamed nuc900, regarding
657 the ARM series product line, you can login the following
658 link address to know more.
660 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
661 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
667 select GENERIC_CLOCKEVENTS
671 select MIGHT_HAVE_CACHE_L2X0
672 select NEED_MACH_IO_H if PCI
673 select ARCH_HAS_CPUFREQ
675 This enables support for NVIDIA Tegra based systems (Tegra APX,
676 Tegra 6xx and Tegra 2 series).
678 config ARCH_PICOXCELL
679 bool "Picochip picoXcell"
680 select ARCH_REQUIRE_GPIOLIB
681 select ARM_PATCH_PHYS_VIRT
685 select GENERIC_CLOCKEVENTS
692 This enables support for systems based on the Picochip picoXcell
693 family of Femtocell devices. The picoxcell support requires device tree
697 bool "Philips Nexperia PNX4008 Mobile"
700 select ARCH_USES_GETTIMEOFFSET
702 This enables support for Philips PNX4008 mobile platform.
705 bool "PXA2xx/PXA3xx-based"
708 select ARCH_HAS_CPUFREQ
711 select ARCH_REQUIRE_GPIOLIB
712 select GENERIC_CLOCKEVENTS
717 select MULTI_IRQ_HANDLER
718 select ARM_CPU_SUSPEND if PM
721 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
726 select GENERIC_CLOCKEVENTS
727 select ARCH_REQUIRE_GPIOLIB
730 Support for Qualcomm MSM/QSD based systems. This runs on the
731 apps processor of the MSM/QSD and depends on a shared memory
732 interface to the modem processor which runs the baseband
733 stack and controls some vital subsystems
734 (clock and power control, etc).
737 bool "Renesas SH-Mobile / R-Mobile"
740 select HAVE_MACH_CLKDEV
742 select GENERIC_CLOCKEVENTS
743 select MIGHT_HAVE_CACHE_L2X0
746 select MULTI_IRQ_HANDLER
747 select PM_GENERIC_DOMAINS if PM
748 select NEED_MACH_MEMORY_H
750 Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
756 select ARCH_MAY_HAVE_PC_FDC
757 select HAVE_PATA_PLATFORM
760 select ARCH_SPARSEMEM_ENABLE
761 select ARCH_USES_GETTIMEOFFSET
763 select NEED_MACH_IO_H
764 select NEED_MACH_MEMORY_H
766 On the Acorn Risc-PC, Linux can support the internal IDE disk and
767 CD-ROM interface, serial and parallel port, and the floppy drive.
774 select ARCH_SPARSEMEM_ENABLE
776 select ARCH_HAS_CPUFREQ
778 select GENERIC_CLOCKEVENTS
780 select ARCH_REQUIRE_GPIOLIB
782 select NEED_MACH_MEMORY_H
785 Support for StrongARM 11x0 based boards.
788 bool "Samsung S3C24XX SoCs"
790 select ARCH_HAS_CPUFREQ
793 select ARCH_USES_GETTIMEOFFSET
794 select HAVE_S3C2410_I2C if I2C
795 select HAVE_S3C_RTC if RTC_CLASS
796 select HAVE_S3C2410_WATCHDOG if WATCHDOG
797 select NEED_MACH_IO_H
799 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
800 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
801 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
802 Samsung SMDK2410 development board (and derivatives).
805 bool "Samsung S3C64XX"
813 select ARCH_USES_GETTIMEOFFSET
814 select ARCH_HAS_CPUFREQ
815 select ARCH_REQUIRE_GPIOLIB
816 select SAMSUNG_CLKSRC
817 select SAMSUNG_IRQ_VIC_TIMER
818 select S3C_GPIO_TRACK
820 select USB_ARCH_HAS_OHCI
821 select SAMSUNG_GPIOLIB_4BIT
822 select HAVE_S3C2410_I2C if I2C
823 select HAVE_S3C2410_WATCHDOG if WATCHDOG
825 Samsung S3C64XX series based systems
828 bool "Samsung S5P6440 S5P6450"
834 select HAVE_S3C2410_WATCHDOG if WATCHDOG
835 select GENERIC_CLOCKEVENTS
836 select HAVE_S3C2410_I2C if I2C
837 select HAVE_S3C_RTC if RTC_CLASS
839 Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
843 bool "Samsung S5PC100"
848 select ARCH_USES_GETTIMEOFFSET
849 select HAVE_S3C2410_I2C if I2C
850 select HAVE_S3C_RTC if RTC_CLASS
851 select HAVE_S3C2410_WATCHDOG if WATCHDOG
853 Samsung S5PC100 series based systems
856 bool "Samsung S5PV210/S5PC110"
858 select ARCH_SPARSEMEM_ENABLE
859 select ARCH_HAS_HOLES_MEMORYMODEL
864 select ARCH_HAS_CPUFREQ
865 select GENERIC_CLOCKEVENTS
866 select HAVE_S3C2410_I2C if I2C
867 select HAVE_S3C_RTC if RTC_CLASS
868 select HAVE_S3C2410_WATCHDOG if WATCHDOG
869 select NEED_MACH_MEMORY_H
871 Samsung S5PV210/S5PC110 series based systems
874 bool "SAMSUNG EXYNOS"
876 select ARCH_SPARSEMEM_ENABLE
877 select ARCH_HAS_HOLES_MEMORYMODEL
881 select ARCH_HAS_CPUFREQ
882 select GENERIC_CLOCKEVENTS
883 select HAVE_S3C_RTC if RTC_CLASS
884 select HAVE_S3C2410_I2C if I2C
885 select HAVE_S3C2410_WATCHDOG if WATCHDOG
886 select NEED_MACH_MEMORY_H
888 Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
897 select ARCH_USES_GETTIMEOFFSET
898 select NEED_MACH_MEMORY_H
899 select NEED_MACH_IO_H
901 Support for the StrongARM based Digital DNARD machine, also known
902 as "Shark" (<http://www.shark-linux.de/shark.html>).
905 bool "ST-Ericsson U300 Series"
911 select ARM_PATCH_PHYS_VIRT
913 select GENERIC_CLOCKEVENTS
915 select HAVE_MACH_CLKDEV
917 select ARCH_REQUIRE_GPIOLIB
919 Support for ST-Ericsson U300 series mobile platforms.
922 bool "ST-Ericsson U8500 Series"
926 select GENERIC_CLOCKEVENTS
928 select ARCH_REQUIRE_GPIOLIB
929 select ARCH_HAS_CPUFREQ
931 select MIGHT_HAVE_CACHE_L2X0
933 Support for ST-Ericsson's Ux500 architecture
936 bool "STMicroelectronics Nomadik"
941 select GENERIC_CLOCKEVENTS
942 select MIGHT_HAVE_CACHE_L2X0
943 select ARCH_REQUIRE_GPIOLIB
945 Support for the Nomadik platform by ST-Ericsson
949 select GENERIC_CLOCKEVENTS
950 select ARCH_REQUIRE_GPIOLIB
954 select GENERIC_ALLOCATOR
955 select GENERIC_IRQ_CHIP
956 select ARCH_HAS_HOLES_MEMORYMODEL
958 Support for TI's DaVinci platform.
963 select ARCH_REQUIRE_GPIOLIB
964 select ARCH_HAS_CPUFREQ
966 select GENERIC_CLOCKEVENTS
967 select ARCH_HAS_HOLES_MEMORYMODEL
969 Support for TI's OMAP platform (OMAP1/2/3/4).
974 select ARCH_REQUIRE_GPIOLIB
977 select GENERIC_CLOCKEVENTS
980 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
983 bool "VIA/WonderMedia 85xx"
986 select ARCH_HAS_CPUFREQ
987 select GENERIC_CLOCKEVENTS
988 select ARCH_REQUIRE_GPIOLIB
991 Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
994 bool "Xilinx Zynq ARM Cortex A9 Platform"
996 select GENERIC_CLOCKEVENTS
1001 select MIGHT_HAVE_CACHE_L2X0
1004 Support for Xilinx Zynq ARM Cortex A9 Platform
1008 # This is sorted alphabetically by mach-* pathname. However, plat-*
1009 # Kconfigs may be included either alphabetically (according to the
1010 # plat- suffix) or along side the corresponding mach-* source.
1012 source "arch/arm/mach-at91/Kconfig"
1014 source "arch/arm/mach-bcmring/Kconfig"
1016 source "arch/arm/mach-clps711x/Kconfig"
1018 source "arch/arm/mach-cns3xxx/Kconfig"
1020 source "arch/arm/mach-davinci/Kconfig"
1022 source "arch/arm/mach-dove/Kconfig"
1024 source "arch/arm/mach-ep93xx/Kconfig"
1026 source "arch/arm/mach-footbridge/Kconfig"
1028 source "arch/arm/mach-gemini/Kconfig"
1030 source "arch/arm/mach-h720x/Kconfig"
1032 source "arch/arm/mach-integrator/Kconfig"
1034 source "arch/arm/mach-iop32x/Kconfig"
1036 source "arch/arm/mach-iop33x/Kconfig"
1038 source "arch/arm/mach-iop13xx/Kconfig"
1040 source "arch/arm/mach-ixp4xx/Kconfig"
1042 source "arch/arm/mach-ixp2000/Kconfig"
1044 source "arch/arm/mach-ixp23xx/Kconfig"
1046 source "arch/arm/mach-kirkwood/Kconfig"
1048 source "arch/arm/mach-ks8695/Kconfig"
1050 source "arch/arm/mach-lpc32xx/Kconfig"
1052 source "arch/arm/mach-msm/Kconfig"
1054 source "arch/arm/mach-mv78xx0/Kconfig"
1056 source "arch/arm/plat-mxc/Kconfig"
1058 source "arch/arm/mach-mxs/Kconfig"
1060 source "arch/arm/mach-netx/Kconfig"
1062 source "arch/arm/mach-nomadik/Kconfig"
1063 source "arch/arm/plat-nomadik/Kconfig"
1065 source "arch/arm/plat-omap/Kconfig"
1067 source "arch/arm/mach-omap1/Kconfig"
1069 source "arch/arm/mach-omap2/Kconfig"
1071 source "arch/arm/mach-orion5x/Kconfig"
1073 source "arch/arm/mach-pxa/Kconfig"
1074 source "arch/arm/plat-pxa/Kconfig"
1076 source "arch/arm/mach-mmp/Kconfig"
1078 source "arch/arm/mach-realview/Kconfig"
1080 source "arch/arm/mach-sa1100/Kconfig"
1082 source "arch/arm/plat-samsung/Kconfig"
1083 source "arch/arm/plat-s3c24xx/Kconfig"
1084 source "arch/arm/plat-s5p/Kconfig"
1086 source "arch/arm/plat-spear/Kconfig"
1088 source "arch/arm/mach-s3c24xx/Kconfig"
1090 source "arch/arm/mach-s3c2412/Kconfig"
1091 source "arch/arm/mach-s3c2440/Kconfig"
1095 source "arch/arm/mach-s3c64xx/Kconfig"
1098 source "arch/arm/mach-s5p64x0/Kconfig"
1100 source "arch/arm/mach-s5pc100/Kconfig"
1102 source "arch/arm/mach-s5pv210/Kconfig"
1104 source "arch/arm/mach-exynos/Kconfig"
1106 source "arch/arm/mach-shmobile/Kconfig"
1108 source "arch/arm/mach-tegra/Kconfig"
1110 source "arch/arm/mach-u300/Kconfig"
1112 source "arch/arm/mach-ux500/Kconfig"
1114 source "arch/arm/mach-versatile/Kconfig"
1116 source "arch/arm/mach-vexpress/Kconfig"
1117 source "arch/arm/plat-versatile/Kconfig"
1119 source "arch/arm/mach-vt8500/Kconfig"
1121 source "arch/arm/mach-w90x900/Kconfig"
1123 # Definitions to make life easier
1129 select GENERIC_CLOCKEVENTS
1134 select GENERIC_IRQ_CHIP
1139 config PLAT_VERSATILE
1142 config ARM_TIMER_SP804
1145 select HAVE_SCHED_CLOCK
1147 source arch/arm/mm/Kconfig
1151 default 16 if ARCH_EP93XX
1155 bool "Enable iWMMXt support"
1156 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1157 default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1159 Enable support for iWMMXt context switching at run time if
1160 running on a CPU that supports it.
1164 depends on CPU_XSCALE
1168 depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
1169 (!ARCH_OMAP3 || OMAP3_EMU)
1173 config MULTI_IRQ_HANDLER
1176 Allow each machine to specify it's own IRQ handler at run time.
1179 source "arch/arm/Kconfig-nommu"
1182 config ARM_ERRATA_326103
1183 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1186 Executing a SWP instruction to read-only memory does not set bit 11
1187 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1188 treat the access as a read, preventing a COW from occurring and
1189 causing the faulting task to livelock.
1191 config ARM_ERRATA_411920
1192 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1193 depends on CPU_V6 || CPU_V6K
1195 Invalidation of the Instruction Cache operation can
1196 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1197 It does not affect the MPCore. This option enables the ARM Ltd.
1198 recommended workaround.
1200 config ARM_ERRATA_430973
1201 bool "ARM errata: Stale prediction on replaced interworking branch"
1204 This option enables the workaround for the 430973 Cortex-A8
1205 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1206 interworking branch is replaced with another code sequence at the
1207 same virtual address, whether due to self-modifying code or virtual
1208 to physical address re-mapping, Cortex-A8 does not recover from the
1209 stale interworking branch prediction. This results in Cortex-A8
1210 executing the new code sequence in the incorrect ARM or Thumb state.
1211 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1212 and also flushes the branch target cache at every context switch.
1213 Note that setting specific bits in the ACTLR register may not be
1214 available in non-secure mode.
1216 config ARM_ERRATA_458693
1217 bool "ARM errata: Processor deadlock when a false hazard is created"
1220 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1221 erratum. For very specific sequences of memory operations, it is
1222 possible for a hazard condition intended for a cache line to instead
1223 be incorrectly associated with a different cache line. This false
1224 hazard might then cause a processor deadlock. The workaround enables
1225 the L1 caching of the NEON accesses and disables the PLD instruction
1226 in the ACTLR register. Note that setting specific bits in the ACTLR
1227 register may not be available in non-secure mode.
1229 config ARM_ERRATA_460075
1230 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1233 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1234 erratum. Any asynchronous access to the L2 cache may encounter a
1235 situation in which recent store transactions to the L2 cache are lost
1236 and overwritten with stale memory contents from external memory. The
1237 workaround disables the write-allocate mode for the L2 cache via the
1238 ACTLR register. Note that setting specific bits in the ACTLR register
1239 may not be available in non-secure mode.
1241 config ARM_ERRATA_742230
1242 bool "ARM errata: DMB operation may be faulty"
1243 depends on CPU_V7 && SMP
1245 This option enables the workaround for the 742230 Cortex-A9
1246 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1247 between two write operations may not ensure the correct visibility
1248 ordering of the two writes. This workaround sets a specific bit in
1249 the diagnostic register of the Cortex-A9 which causes the DMB
1250 instruction to behave as a DSB, ensuring the correct behaviour of
1253 config ARM_ERRATA_742231
1254 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1255 depends on CPU_V7 && SMP
1257 This option enables the workaround for the 742231 Cortex-A9
1258 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1259 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1260 accessing some data located in the same cache line, may get corrupted
1261 data due to bad handling of the address hazard when the line gets
1262 replaced from one of the CPUs at the same time as another CPU is
1263 accessing it. This workaround sets specific bits in the diagnostic
1264 register of the Cortex-A9 which reduces the linefill issuing
1265 capabilities of the processor.
1267 config PL310_ERRATA_588369
1268 bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1269 depends on CACHE_L2X0
1271 The PL310 L2 cache controller implements three types of Clean &
1272 Invalidate maintenance operations: by Physical Address
1273 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1274 They are architecturally defined to behave as the execution of a
1275 clean operation followed immediately by an invalidate operation,
1276 both performing to the same memory location. This functionality
1277 is not correctly implemented in PL310 as clean lines are not
1278 invalidated as a result of these operations.
1280 config ARM_ERRATA_720789
1281 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1284 This option enables the workaround for the 720789 Cortex-A9 (prior to
1285 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1286 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1287 As a consequence of this erratum, some TLB entries which should be
1288 invalidated are not, resulting in an incoherency in the system page
1289 tables. The workaround changes the TLB flushing routines to invalidate
1290 entries regardless of the ASID.
1292 config PL310_ERRATA_727915
1293 bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
1294 depends on CACHE_L2X0
1296 PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1297 operation (offset 0x7FC). This operation runs in background so that
1298 PL310 can handle normal accesses while it is in progress. Under very
1299 rare circumstances, due to this erratum, write data can be lost when
1300 PL310 treats a cacheable write transaction during a Clean &
1301 Invalidate by Way operation.
1303 config ARM_ERRATA_743622
1304 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1307 This option enables the workaround for the 743622 Cortex-A9
1308 (r2p*) erratum. Under very rare conditions, a faulty
1309 optimisation in the Cortex-A9 Store Buffer may lead to data
1310 corruption. This workaround sets a specific bit in the diagnostic
1311 register of the Cortex-A9 which disables the Store Buffer
1312 optimisation, preventing the defect from occurring. This has no
1313 visible impact on the overall performance or power consumption of the
1316 config ARM_ERRATA_751472
1317 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1320 This option enables the workaround for the 751472 Cortex-A9 (prior
1321 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1322 completion of a following broadcasted operation if the second
1323 operation is received by a CPU before the ICIALLUIS has completed,
1324 potentially leading to corrupted entries in the cache or TLB.
1326 config PL310_ERRATA_753970
1327 bool "PL310 errata: cache sync operation may be faulty"
1328 depends on CACHE_PL310
1330 This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1332 Under some condition the effect of cache sync operation on
1333 the store buffer still remains when the operation completes.
1334 This means that the store buffer is always asked to drain and
1335 this prevents it from merging any further writes. The workaround
1336 is to replace the normal offset of cache sync operation (0x730)
1337 by another offset targeting an unmapped PL310 register 0x740.
1338 This has the same effect as the cache sync operation: store buffer
1339 drain and waiting for all buffers empty.
1341 config ARM_ERRATA_754322
1342 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1345 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1346 r3p*) erratum. A speculative memory access may cause a page table walk
1347 which starts prior to an ASID switch but completes afterwards. This
1348 can populate the micro-TLB with a stale entry which may be hit with
1349 the new ASID. This workaround places two dsb instructions in the mm
1350 switching code so that no page table walks can cross the ASID switch.
1352 config ARM_ERRATA_754327
1353 bool "ARM errata: no automatic Store Buffer drain"
1354 depends on CPU_V7 && SMP
1356 This option enables the workaround for the 754327 Cortex-A9 (prior to
1357 r2p0) erratum. The Store Buffer does not have any automatic draining
1358 mechanism and therefore a livelock may occur if an external agent
1359 continuously polls a memory location waiting to observe an update.
1360 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1361 written polling loops from denying visibility of updates to memory.
1363 config ARM_ERRATA_364296
1364 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1365 depends on CPU_V6 && !SMP
1367 This options enables the workaround for the 364296 ARM1136
1368 r0p2 erratum (possible cache data corruption with
1369 hit-under-miss enabled). It sets the undocumented bit 31 in
1370 the auxiliary control register and the FI bit in the control
1371 register, thus disabling hit-under-miss without putting the
1372 processor into full low interrupt latency mode. ARM11MPCore
1375 config ARM_ERRATA_764369
1376 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1377 depends on CPU_V7 && SMP
1379 This option enables the workaround for erratum 764369
1380 affecting Cortex-A9 MPCore with two or more processors (all
1381 current revisions). Under certain timing circumstances, a data
1382 cache line maintenance operation by MVA targeting an Inner
1383 Shareable memory region may fail to proceed up to either the
1384 Point of Coherency or to the Point of Unification of the
1385 system. This workaround adds a DSB instruction before the
1386 relevant cache maintenance functions and sets a specific bit
1387 in the diagnostic control register of the SCU.
1389 config PL310_ERRATA_769419
1390 bool "PL310 errata: no automatic Store Buffer drain"
1391 depends on CACHE_L2X0
1393 On revisions of the PL310 prior to r3p2, the Store Buffer does
1394 not automatically drain. This can cause normal, non-cacheable
1395 writes to be retained when the memory system is idle, leading
1396 to suboptimal I/O performance for drivers using coherent DMA.
1397 This option adds a write barrier to the cpu_idle loop so that,
1398 on systems with an outer cache, the store buffer is drained
1403 source "arch/arm/common/Kconfig"
1413 Find out whether you have ISA slots on your motherboard. ISA is the
1414 name of a bus system, i.e. the way the CPU talks to the other stuff
1415 inside your box. Other bus systems are PCI, EISA, MicroChannel
1416 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1417 newer boards don't support it. If you have ISA, say Y, otherwise N.
1419 # Select ISA DMA controller support
1424 # Select ISA DMA interface
1429 bool "PCI support" if MIGHT_HAVE_PCI
1431 Find out whether you have a PCI motherboard. PCI is the name of a
1432 bus system, i.e. the way the CPU talks to the other stuff inside
1433 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1434 VESA. If you have PCI, say Y, otherwise N.
1440 config PCI_NANOENGINE
1441 bool "BSE nanoEngine PCI support"
1442 depends on SA1100_NANOENGINE
1444 Enable PCI on the BSE nanoEngine board.
1449 # Select the host bridge type
1450 config PCI_HOST_VIA82C505
1452 depends on PCI && ARCH_SHARK
1455 config PCI_HOST_ITE8152
1457 depends on PCI && MACH_ARMCORE
1461 source "drivers/pci/Kconfig"
1463 source "drivers/pcmcia/Kconfig"
1467 menu "Kernel Features"
1469 source "kernel/time/Kconfig"
1474 This option should be selected by machines which have an SMP-
1477 The only effect of this option is to make the SMP-related
1478 options available to the user for configuration.
1481 bool "Symmetric Multi-Processing"
1482 depends on CPU_V6K || CPU_V7
1483 depends on GENERIC_CLOCKEVENTS
1486 select USE_GENERIC_SMP_HELPERS
1487 select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1489 This enables support for systems with more than one CPU. If you have
1490 a system with only one CPU, like most personal computers, say N. If
1491 you have a system with more than one CPU, say Y.
1493 If you say N here, the kernel will run on single and multiprocessor
1494 machines, but will use only one CPU of a multiprocessor machine. If
1495 you say Y here, the kernel will run on many, but not all, single
1496 processor machines. On a single processor machine, the kernel will
1497 run faster if you say N here.
1499 See also <file:Documentation/x86/i386/IO-APIC.txt>,
1500 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1501 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1503 If you don't know what to do here, say N.
1506 bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1507 depends on EXPERIMENTAL
1508 depends on SMP && !XIP_KERNEL
1511 SMP kernels contain instructions which fail on non-SMP processors.
1512 Enabling this option allows the kernel to modify itself to make
1513 these instructions safe. Disabling it allows about 1K of space
1516 If you don't know what to do here, say Y.
1518 config ARM_CPU_TOPOLOGY
1519 bool "Support cpu topology definition"
1520 depends on SMP && CPU_V7
1523 Support ARM cpu topology definition. The MPIDR register defines
1524 affinity between processors which is then used to describe the cpu
1525 topology of an ARM System.
1528 bool "Multi-core scheduler support"
1529 depends on ARM_CPU_TOPOLOGY
1531 Multi-core scheduler support improves the CPU scheduler's decision
1532 making when dealing with multi-core CPU chips at a cost of slightly
1533 increased overhead in some places. If unsure say N here.
1536 bool "SMT scheduler support"
1537 depends on ARM_CPU_TOPOLOGY
1539 Improves the CPU scheduler's decision making when dealing with
1540 MultiThreading at a cost of slightly increased overhead in some
1541 places. If unsure say N here.
1546 This option enables support for the ARM system coherency unit
1548 config ARM_ARCH_TIMER
1549 bool "Architected timer support"
1552 This option enables support for the ARM architected timer
1558 This options enables support for the ARM timer and watchdog unit
1561 prompt "Memory split"
1564 Select the desired split between kernel and user memory.
1566 If you are not absolutely sure what you are doing, leave this
1570 bool "3G/1G user/kernel split"
1572 bool "2G/2G user/kernel split"
1574 bool "1G/3G user/kernel split"
1579 default 0x40000000 if VMSPLIT_1G
1580 default 0x80000000 if VMSPLIT_2G
1584 int "Maximum number of CPUs (2-32)"
1590 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1591 depends on SMP && HOTPLUG && EXPERIMENTAL
1593 Say Y here to experiment with turning CPUs off and on. CPUs
1594 can be controlled through /sys/devices/system/cpu.
1597 bool "Use local timer interrupts"
1600 select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1602 Enable support for local timers on SMP platforms, rather then the
1603 legacy IPI broadcast method. Local timers allows the system
1604 accounting to be spread across the timer interval, preventing a
1605 "thundering herd" at every timer tick.
1609 default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1610 default 355 if ARCH_U8500
1611 default 264 if MACH_H4700
1614 Maximum number of GPIOs in the system.
1616 If unsure, leave the default value.
1618 source kernel/Kconfig.preempt
1622 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
1623 ARCH_S5PV210 || ARCH_EXYNOS4
1624 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1625 default AT91_TIMER_HZ if ARCH_AT91
1626 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1629 config THUMB2_KERNEL
1630 bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1631 depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
1633 select ARM_ASM_UNIFIED
1636 By enabling this option, the kernel will be compiled in
1637 Thumb-2 mode. A compiler/assembler that understand the unified
1638 ARM-Thumb syntax is needed.
1642 config THUMB2_AVOID_R_ARM_THM_JUMP11
1643 bool "Work around buggy Thumb-2 short branch relocations in gas"
1644 depends on THUMB2_KERNEL && MODULES
1647 Various binutils versions can resolve Thumb-2 branches to
1648 locally-defined, preemptible global symbols as short-range "b.n"
1649 branch instructions.
1651 This is a problem, because there's no guarantee the final
1652 destination of the symbol, or any candidate locations for a
1653 trampoline, are within range of the branch. For this reason, the
1654 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1655 relocation in modules at all, and it makes little sense to add
1658 The symptom is that the kernel fails with an "unsupported
1659 relocation" error when loading some modules.
1661 Until fixed tools are available, passing
1662 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1663 code which hits this problem, at the cost of a bit of extra runtime
1664 stack usage in some cases.
1666 The problem is described in more detail at:
1667 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1669 Only Thumb-2 kernels are affected.
1671 Unless you are sure your tools don't have this problem, say Y.
1673 config ARM_ASM_UNIFIED
1677 bool "Use the ARM EABI to compile the kernel"
1679 This option allows for the kernel to be compiled using the latest
1680 ARM ABI (aka EABI). This is only useful if you are using a user
1681 space environment that is also compiled with EABI.
1683 Since there are major incompatibilities between the legacy ABI and
1684 EABI, especially with regard to structure member alignment, this
1685 option also changes the kernel syscall calling convention to
1686 disambiguate both ABIs and allow for backward compatibility support
1687 (selected with CONFIG_OABI_COMPAT).
1689 To use this you need GCC version 4.0.0 or later.
1692 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1693 depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
1696 This option preserves the old syscall interface along with the
1697 new (ARM EABI) one. It also provides a compatibility layer to
1698 intercept syscalls that have structure arguments which layout
1699 in memory differs between the legacy ABI and the new ARM EABI
1700 (only for non "thumb" binaries). This option adds a tiny
1701 overhead to all syscalls and produces a slightly larger kernel.
1702 If you know you'll be using only pure EABI user space then you
1703 can say N here. If this option is not selected and you attempt
1704 to execute a legacy ABI binary then the result will be
1705 UNPREDICTABLE (in fact it can be predicted that it won't work
1706 at all). If in doubt say Y.
1708 config ARCH_HAS_HOLES_MEMORYMODEL
1711 config ARCH_SPARSEMEM_ENABLE
1714 config ARCH_SPARSEMEM_DEFAULT
1715 def_bool ARCH_SPARSEMEM_ENABLE
1717 config ARCH_SELECT_MEMORY_MODEL
1718 def_bool ARCH_SPARSEMEM_ENABLE
1720 config HAVE_ARCH_PFN_VALID
1721 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1724 bool "High Memory Support"
1727 The address space of ARM processors is only 4 Gigabytes large
1728 and it has to accommodate user address space, kernel address
1729 space as well as some memory mapped IO. That means that, if you
1730 have a large amount of physical memory and/or IO, not all of the
1731 memory can be "permanently mapped" by the kernel. The physical
1732 memory that is not permanently mapped is called "high memory".
1734 Depending on the selected kernel/user memory split, minimum
1735 vmalloc space and actual amount of RAM, you may not need this
1736 option which should result in a slightly faster kernel.
1741 bool "Allocate 2nd-level pagetables from highmem"
1744 config HW_PERF_EVENTS
1745 bool "Enable hardware performance counter support for perf events"
1746 depends on PERF_EVENTS && CPU_HAS_PMU
1749 Enable hardware performance counter support for perf events. If
1750 disabled, perf events will use software events only.
1754 config FORCE_MAX_ZONEORDER
1755 int "Maximum zone order" if ARCH_SHMOBILE
1756 range 11 64 if ARCH_SHMOBILE
1757 default "9" if SA1111
1760 The kernel memory allocator divides physically contiguous memory
1761 blocks into "zones", where each zone is a power of two number of
1762 pages. This option selects the largest power of two that the kernel
1763 keeps in the memory allocator. If you need to allocate very large
1764 blocks of physically contiguous memory, then you may need to
1765 increase this value.
1767 This config option is actually maximum order plus one. For example,
1768 a value of 11 means that the largest free memory block is 2^10 pages.
1771 bool "Timer and CPU usage LEDs"
1772 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1773 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1774 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1775 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1776 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1777 ARCH_AT91 || ARCH_DAVINCI || \
1778 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1780 If you say Y here, the LEDs on your machine will be used
1781 to provide useful information about your current system status.
1783 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1784 be able to select which LEDs are active using the options below. If
1785 you are compiling a kernel for the EBSA-110 or the LART however, the
1786 red LED will simply flash regularly to indicate that the system is
1787 still functional. It is safe to say Y here if you have a CATS
1788 system, but the driver will do nothing.
1791 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1792 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1793 || MACH_OMAP_PERSEUS2
1795 depends on !GENERIC_CLOCKEVENTS
1796 default y if ARCH_EBSA110
1798 If you say Y here, one of the system LEDs (the green one on the
1799 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1800 will flash regularly to indicate that the system is still
1801 operational. This is mainly useful to kernel hackers who are
1802 debugging unstable kernels.
1804 The LART uses the same LED for both Timer LED and CPU usage LED
1805 functions. You may choose to use both, but the Timer LED function
1806 will overrule the CPU usage LED.
1809 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1811 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1812 || MACH_OMAP_PERSEUS2
1815 If you say Y here, the red LED will be used to give a good real
1816 time indication of CPU usage, by lighting whenever the idle task
1817 is not currently executing.
1819 The LART uses the same LED for both Timer LED and CPU usage LED
1820 functions. You may choose to use both, but the Timer LED function
1821 will overrule the CPU usage LED.
1823 config ALIGNMENT_TRAP
1825 depends on CPU_CP15_MMU
1826 default y if !ARCH_EBSA110
1827 select HAVE_PROC_CPU if PROC_FS
1829 ARM processors cannot fetch/store information which is not
1830 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1831 address divisible by 4. On 32-bit ARM processors, these non-aligned
1832 fetch/store instructions will be emulated in software if you say
1833 here, which has a severe performance impact. This is necessary for
1834 correct operation of some network protocols. With an IP-only
1835 configuration it is safe to say N, otherwise say Y.
1837 config UACCESS_WITH_MEMCPY
1838 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1839 depends on MMU && EXPERIMENTAL
1840 default y if CPU_FEROCEON
1842 Implement faster copy_to_user and clear_user methods for CPU
1843 cores where a 8-word STM instruction give significantly higher
1844 memory write throughput than a sequence of individual 32bit stores.
1846 A possible side effect is a slight increase in scheduling latency
1847 between threads sharing the same address space if they invoke
1848 such copy operations with large buffers.
1850 However, if the CPU data cache is using a write-allocate mode,
1851 this option is unlikely to provide any performance gain.
1855 prompt "Enable seccomp to safely compute untrusted bytecode"
1857 This kernel feature is useful for number crunching applications
1858 that may need to compute untrusted bytecode during their
1859 execution. By using pipes or other transports made available to
1860 the process as file descriptors supporting the read/write
1861 syscalls, it's possible to isolate those applications in
1862 their own address space using seccomp. Once seccomp is
1863 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1864 and the task is only allowed to execute a few safe syscalls
1865 defined by each seccomp mode.
1867 config CC_STACKPROTECTOR
1868 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1869 depends on EXPERIMENTAL
1871 This option turns on the -fstack-protector GCC feature. This
1872 feature puts, at the beginning of functions, a canary value on
1873 the stack just before the return address, and validates
1874 the value just before actually returning. Stack based buffer
1875 overflows (that need to overwrite this return address) now also
1876 overwrite the canary, which gets detected and the attack is then
1877 neutralized via a kernel panic.
1878 This feature requires gcc version 4.2 or above.
1880 config DEPRECATED_PARAM_STRUCT
1881 bool "Provide old way to pass kernel parameters"
1883 This was deprecated in 2001 and announced to live on for 5 years.
1884 Some old boot loaders still use this way.
1891 bool "Flattened Device Tree support"
1893 select OF_EARLY_FLATTREE
1896 Include support for flattened device tree machine descriptions.
1898 # Compressed boot loader in ROM. Yes, we really want to ask about
1899 # TEXT and BSS so we preserve their values in the config files.
1900 config ZBOOT_ROM_TEXT
1901 hex "Compressed ROM boot loader base address"
1904 The physical address at which the ROM-able zImage is to be
1905 placed in the target. Platforms which normally make use of
1906 ROM-able zImage formats normally set this to a suitable
1907 value in their defconfig file.
1909 If ZBOOT_ROM is not enabled, this has no effect.
1911 config ZBOOT_ROM_BSS
1912 hex "Compressed ROM boot loader BSS address"
1915 The base address of an area of read/write memory in the target
1916 for the ROM-able zImage which must be available while the
1917 decompressor is running. It must be large enough to hold the
1918 entire decompressed kernel plus an additional 128 KiB.
1919 Platforms which normally make use of ROM-able zImage formats
1920 normally set this to a suitable value in their defconfig file.
1922 If ZBOOT_ROM is not enabled, this has no effect.
1925 bool "Compressed boot loader in ROM/flash"
1926 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1928 Say Y here if you intend to execute your compressed kernel image
1929 (zImage) directly from ROM or flash. If unsure, say N.
1932 prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1933 depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1934 default ZBOOT_ROM_NONE
1936 Include experimental SD/MMC loading code in the ROM-able zImage.
1937 With this enabled it is possible to write the the ROM-able zImage
1938 kernel image to an MMC or SD card and boot the kernel straight
1939 from the reset vector. At reset the processor Mask ROM will load
1940 the first part of the the ROM-able zImage which in turn loads the
1941 rest the kernel image to RAM.
1943 config ZBOOT_ROM_NONE
1944 bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1946 Do not load image from SD or MMC
1948 config ZBOOT_ROM_MMCIF
1949 bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1951 Load image from MMCIF hardware block.
1953 config ZBOOT_ROM_SH_MOBILE_SDHI
1954 bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1956 Load image from SDHI hardware block
1960 config ARM_APPENDED_DTB
1961 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1962 depends on OF && !ZBOOT_ROM && EXPERIMENTAL
1964 With this option, the boot code will look for a device tree binary
1965 (DTB) appended to zImage
1966 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1968 This is meant as a backward compatibility convenience for those
1969 systems with a bootloader that can't be upgraded to accommodate
1970 the documented boot protocol using a device tree.
1972 Beware that there is very little in terms of protection against
1973 this option being confused by leftover garbage in memory that might
1974 look like a DTB header after a reboot if no actual DTB is appended
1975 to zImage. Do not leave this option active in a production kernel
1976 if you don't intend to always append a DTB. Proper passing of the
1977 location into r2 of a bootloader provided DTB is always preferable
1980 config ARM_ATAG_DTB_COMPAT
1981 bool "Supplement the appended DTB with traditional ATAG information"
1982 depends on ARM_APPENDED_DTB
1984 Some old bootloaders can't be updated to a DTB capable one, yet
1985 they provide ATAGs with memory configuration, the ramdisk address,
1986 the kernel cmdline string, etc. Such information is dynamically
1987 provided by the bootloader and can't always be stored in a static
1988 DTB. To allow a device tree enabled kernel to be used with such
1989 bootloaders, this option allows zImage to extract the information
1990 from the ATAG list and store it at run time into the appended DTB.
1993 string "Default kernel command string"
1996 On some architectures (EBSA110 and CATS), there is currently no way
1997 for the boot loader to pass arguments to the kernel. For these
1998 architectures, you should supply some command-line options at build
1999 time by entering them here. As a minimum, you should specify the
2000 memory size and the root device (e.g., mem=64M root=/dev/nfs).
2003 prompt "Kernel command line type" if CMDLINE != ""
2004 default CMDLINE_FROM_BOOTLOADER
2006 config CMDLINE_FROM_BOOTLOADER
2007 bool "Use bootloader kernel arguments if available"
2009 Uses the command-line options passed by the boot loader. If
2010 the boot loader doesn't provide any, the default kernel command
2011 string provided in CMDLINE will be used.
2013 config CMDLINE_EXTEND
2014 bool "Extend bootloader kernel arguments"
2016 The command-line arguments provided by the boot loader will be
2017 appended to the default kernel command string.
2019 config CMDLINE_FORCE
2020 bool "Always use the default kernel command string"
2022 Always use the default kernel command string, even if the boot
2023 loader passes other arguments to the kernel.
2024 This is useful if you cannot or don't want to change the
2025 command-line options your boot loader passes to the kernel.
2029 bool "Kernel Execute-In-Place from ROM"
2030 depends on !ZBOOT_ROM && !ARM_LPAE
2032 Execute-In-Place allows the kernel to run from non-volatile storage
2033 directly addressable by the CPU, such as NOR flash. This saves RAM
2034 space since the text section of the kernel is not loaded from flash
2035 to RAM. Read-write sections, such as the data section and stack,
2036 are still copied to RAM. The XIP kernel is not compressed since
2037 it has to run directly from flash, so it will take more space to
2038 store it. The flash address used to link the kernel object files,
2039 and for storing it, is configuration dependent. Therefore, if you
2040 say Y here, you must know the proper physical address where to
2041 store the kernel image depending on your own flash memory usage.
2043 Also note that the make target becomes "make xipImage" rather than
2044 "make zImage" or "make Image". The final kernel binary to put in
2045 ROM memory will be arch/arm/boot/xipImage.
2049 config XIP_PHYS_ADDR
2050 hex "XIP Kernel Physical Location"
2051 depends on XIP_KERNEL
2052 default "0x00080000"
2054 This is the physical address in your flash memory the kernel will
2055 be linked for and stored to. This address is dependent on your
2059 bool "Kexec system call (EXPERIMENTAL)"
2060 depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
2062 kexec is a system call that implements the ability to shutdown your
2063 current kernel, and to start another kernel. It is like a reboot
2064 but it is independent of the system firmware. And like a reboot
2065 you can start any kernel with it, not just Linux.
2067 It is an ongoing process to be certain the hardware in a machine
2068 is properly shutdown, so do not be surprised if this code does not
2069 initially work for you. It may help to enable device hotplugging
2073 bool "Export atags in procfs"
2077 Should the atags used to boot the kernel be exported in an "atags"
2078 file in procfs. Useful with kexec.
2081 bool "Build kdump crash kernel (EXPERIMENTAL)"
2082 depends on EXPERIMENTAL
2084 Generate crash dump after being started by kexec. This should
2085 be normally only set in special crash dump kernels which are
2086 loaded in the main kernel with kexec-tools into a specially
2087 reserved region and then later executed after a crash by
2088 kdump/kexec. The crash dump kernel must be compiled to a
2089 memory address not used by the main kernel
2091 For more details see Documentation/kdump/kdump.txt
2093 config AUTO_ZRELADDR
2094 bool "Auto calculation of the decompressed kernel image address"
2095 depends on !ZBOOT_ROM && !ARCH_U300
2097 ZRELADDR is the physical address where the decompressed kernel
2098 image will be placed. If AUTO_ZRELADDR is selected, the address
2099 will be determined at run-time by masking the current IP with
2100 0xf8000000. This assumes the zImage being placed in the first 128MB
2101 from start of memory.
2105 menu "CPU Power Management"
2109 source "drivers/cpufreq/Kconfig"
2112 tristate "CPUfreq driver for i.MX CPUs"
2113 depends on ARCH_MXC && CPU_FREQ
2115 This enables the CPUfreq driver for i.MX CPUs.
2117 config CPU_FREQ_SA1100
2120 config CPU_FREQ_SA1110
2123 config CPU_FREQ_INTEGRATOR
2124 tristate "CPUfreq driver for ARM Integrator CPUs"
2125 depends on ARCH_INTEGRATOR && CPU_FREQ
2128 This enables the CPUfreq driver for ARM Integrator CPUs.
2130 For details, take a look at <file:Documentation/cpu-freq>.
2136 depends on CPU_FREQ && ARCH_PXA && PXA25x
2138 select CPU_FREQ_TABLE
2139 select CPU_FREQ_DEFAULT_GOV_USERSPACE
2144 Internal configuration node for common cpufreq on Samsung SoC
2146 config CPU_FREQ_S3C24XX
2147 bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2148 depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
2151 This enables the CPUfreq driver for the Samsung S3C24XX family
2154 For details, take a look at <file:Documentation/cpu-freq>.
2158 config CPU_FREQ_S3C24XX_PLL
2159 bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2160 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
2162 Compile in support for changing the PLL frequency from the
2163 S3C24XX series CPUfreq driver. The PLL takes time to settle
2164 after a frequency change, so by default it is not enabled.
2166 This also means that the PLL tables for the selected CPU(s) will
2167 be built which may increase the size of the kernel image.
2169 config CPU_FREQ_S3C24XX_DEBUG
2170 bool "Debug CPUfreq Samsung driver core"
2171 depends on CPU_FREQ_S3C24XX
2173 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
2175 config CPU_FREQ_S3C24XX_IODEBUG
2176 bool "Debug CPUfreq Samsung driver IO timing"
2177 depends on CPU_FREQ_S3C24XX
2179 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
2181 config CPU_FREQ_S3C24XX_DEBUGFS
2182 bool "Export debugfs for CPUFreq"
2183 depends on CPU_FREQ_S3C24XX && DEBUG_FS
2185 Export status information via debugfs.
2189 source "drivers/cpuidle/Kconfig"
2193 menu "Floating point emulation"
2195 comment "At least one emulation must be selected"
2198 bool "NWFPE math emulation"
2199 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2201 Say Y to include the NWFPE floating point emulator in the kernel.
2202 This is necessary to run most binaries. Linux does not currently
2203 support floating point hardware so you need to say Y here even if
2204 your machine has an FPA or floating point co-processor podule.
2206 You may say N here if you are going to load the Acorn FPEmulator
2207 early in the bootup.
2210 bool "Support extended precision"
2211 depends on FPE_NWFPE
2213 Say Y to include 80-bit support in the kernel floating-point
2214 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2215 Note that gcc does not generate 80-bit operations by default,
2216 so in most cases this option only enlarges the size of the
2217 floating point emulator without any good reason.
2219 You almost surely want to say N here.
2222 bool "FastFPE math emulation (EXPERIMENTAL)"
2223 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
2225 Say Y here to include the FAST floating point emulator in the kernel.
2226 This is an experimental much faster emulator which now also has full
2227 precision for the mantissa. It does not support any exceptions.
2228 It is very simple, and approximately 3-6 times faster than NWFPE.
2230 It should be sufficient for most programs. It may be not suitable
2231 for scientific calculations, but you have to check this for yourself.
2232 If you do not feel you need a faster FP emulation you should better
2236 bool "VFP-format floating point maths"
2237 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2239 Say Y to include VFP support code in the kernel. This is needed
2240 if your hardware includes a VFP unit.
2242 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2243 release notes and additional status information.
2245 Say N if your target does not have VFP hardware.
2253 bool "Advanced SIMD (NEON) Extension support"
2254 depends on VFPv3 && CPU_V7
2256 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2261 menu "Userspace binary formats"
2263 source "fs/Kconfig.binfmt"
2266 tristate "RISC OS personality"
2269 Say Y here to include the kernel code necessary if you want to run
2270 Acorn RISC OS/Arthur binaries under Linux. This code is still very
2271 experimental; if this sounds frightening, say N and sleep in peace.
2272 You can also say M here to compile this support as a module (which
2273 will be called arthur).
2277 menu "Power management options"
2279 source "kernel/power/Kconfig"
2281 config ARCH_SUSPEND_POSSIBLE
2282 depends on !ARCH_S5PC100
2283 depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2284 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
2287 config ARM_CPU_SUSPEND
2292 source "net/Kconfig"
2294 source "drivers/Kconfig"
2298 source "arch/arm/Kconfig.debug"
2300 source "security/Kconfig"
2302 source "crypto/Kconfig"
2304 source "lib/Kconfig"