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)
13 select HAVE_KPROBES if !XIP_KERNEL
14 select HAVE_KRETPROBES if (HAVE_KPROBES)
15 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
16 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
17 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
18 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
19 select HAVE_GENERIC_DMA_COHERENT
20 select HAVE_KERNEL_GZIP
21 select HAVE_KERNEL_LZO
22 select HAVE_KERNEL_LZMA
24 select HAVE_PERF_EVENTS
25 select PERF_USE_VMALLOC
26 select HAVE_REGS_AND_STACK_ACCESS_API
27 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
28 select HAVE_C_RECORDMCOUNT
29 select HAVE_GENERIC_HARDIRQS
30 select HAVE_SPARSE_IRQ
31 select GENERIC_IRQ_SHOW
32 select CPU_PM if (SUSPEND || CPU_IDLE)
34 The ARM series is a line of low-power-consumption RISC chip designs
35 licensed by ARM Ltd and targeted at embedded applications and
36 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
37 manufactured, but legacy ARM-based PC hardware remains popular in
38 Europe. There is an ARM Linux project with a web page at
39 <http://www.arm.linux.org.uk/>.
41 config ARM_HAS_SG_CHAIN
50 config SYS_SUPPORTS_APM_EMULATION
53 config HAVE_SCHED_CLOCK
59 config ARCH_USES_GETTIMEOFFSET
63 config GENERIC_CLOCKEVENTS
66 config GENERIC_CLOCKEVENTS_BROADCAST
68 depends on GENERIC_CLOCKEVENTS
77 select GENERIC_ALLOCATOR
88 The Extended Industry Standard Architecture (EISA) bus was
89 developed as an open alternative to the IBM MicroChannel bus.
91 The EISA bus provided some of the features of the IBM MicroChannel
92 bus while maintaining backward compatibility with cards made for
93 the older ISA bus. The EISA bus saw limited use between 1988 and
94 1995 when it was made obsolete by the PCI bus.
96 Say Y here if you are building a kernel for an EISA-based machine.
106 MicroChannel Architecture is found in some IBM PS/2 machines and
107 laptops. It is a bus system similar to PCI or ISA. See
108 <file:Documentation/mca.txt> (and especially the web page given
109 there) before attempting to build an MCA bus kernel.
111 config STACKTRACE_SUPPORT
115 config HAVE_LATENCYTOP_SUPPORT
120 config LOCKDEP_SUPPORT
124 config TRACE_IRQFLAGS_SUPPORT
128 config HARDIRQS_SW_RESEND
132 config GENERIC_IRQ_PROBE
136 config GENERIC_LOCKBREAK
139 depends on SMP && PREEMPT
141 config RWSEM_GENERIC_SPINLOCK
145 config RWSEM_XCHGADD_ALGORITHM
148 config ARCH_HAS_ILOG2_U32
151 config ARCH_HAS_ILOG2_U64
154 config ARCH_HAS_CPUFREQ
157 Internal node to signify that the ARCH has CPUFREQ support
158 and that the relevant menu configurations are displayed for
161 config ARCH_HAS_CPU_IDLE_WAIT
164 config GENERIC_HWEIGHT
168 config GENERIC_CALIBRATE_DELAY
172 config ARCH_MAY_HAVE_PC_FDC
178 config NEED_DMA_MAP_STATE
181 config GENERIC_ISA_DMA
192 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
193 default DRAM_BASE if REMAP_VECTORS_TO_RAM
196 The base address of exception vectors.
198 config ARM_PATCH_PHYS_VIRT
199 bool "Patch physical to virtual translations at runtime" if EMBEDDED
201 depends on !XIP_KERNEL && MMU
202 depends on !ARCH_REALVIEW || !SPARSEMEM
204 Patch phys-to-virt and virt-to-phys translation functions at
205 boot and module load time according to the position of the
206 kernel in system memory.
208 This can only be used with non-XIP MMU kernels where the base
209 of physical memory is at a 16MB boundary.
211 Only disable this option if you know that you do not require
212 this feature (eg, building a kernel for a single machine) and
213 you need to shrink the kernel to the minimal size.
215 config NEED_MACH_MEMORY_H
218 Select this when mach/memory.h is required to provide special
219 definitions for this platform. The need for mach/memory.h should
220 be avoided when possible.
223 hex "Physical address of main memory"
224 depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
226 Please provide the physical address corresponding to the
227 location of main memory in your system.
233 source "init/Kconfig"
235 source "kernel/Kconfig.freezer"
240 bool "MMU-based Paged Memory Management Support"
243 Select if you want MMU-based virtualised addressing space
244 support by paged memory management. If unsure, say 'Y'.
247 # The "ARM system type" choice list is ordered alphabetically by option
248 # text. Please add new entries in the option alphabetic order.
251 prompt "ARM system type"
252 default ARCH_VERSATILE
254 config ARCH_INTEGRATOR
255 bool "ARM Ltd. Integrator family"
257 select ARCH_HAS_CPUFREQ
259 select HAVE_MACH_CLKDEV
261 select GENERIC_CLOCKEVENTS
262 select PLAT_VERSATILE
263 select PLAT_VERSATILE_FPGA_IRQ
264 select NEED_MACH_MEMORY_H
266 Support for ARM's Integrator platform.
269 bool "ARM Ltd. RealView family"
272 select HAVE_MACH_CLKDEV
274 select GENERIC_CLOCKEVENTS
275 select ARCH_WANT_OPTIONAL_GPIOLIB
276 select PLAT_VERSATILE
277 select PLAT_VERSATILE_CLCD
278 select ARM_TIMER_SP804
279 select GPIO_PL061 if GPIOLIB
280 select NEED_MACH_MEMORY_H
282 This enables support for ARM Ltd RealView boards.
284 config ARCH_VERSATILE
285 bool "ARM Ltd. Versatile family"
289 select HAVE_MACH_CLKDEV
291 select GENERIC_CLOCKEVENTS
292 select ARCH_WANT_OPTIONAL_GPIOLIB
293 select PLAT_VERSATILE
294 select PLAT_VERSATILE_CLCD
295 select PLAT_VERSATILE_FPGA_IRQ
296 select ARM_TIMER_SP804
297 select MULTI_IRQ_HANDLER
299 This enables support for ARM Ltd Versatile board.
302 bool "ARM Ltd. Versatile Express family"
303 select ARCH_WANT_OPTIONAL_GPIOLIB
305 select ARM_TIMER_SP804
307 select HAVE_MACH_CLKDEV
308 select GENERIC_CLOCKEVENTS
310 select HAVE_PATA_PLATFORM
312 select PLAT_VERSATILE
313 select PLAT_VERSATILE_CLCD
315 This enables support for the ARM Ltd Versatile Express boards.
319 select ARCH_REQUIRE_GPIOLIB
323 This enables support for systems based on the Atmel AT91RM9200,
324 AT91SAM9 and AT91CAP9 processors.
327 bool "Broadcom BCMRING"
331 select ARM_TIMER_SP804
333 select GENERIC_CLOCKEVENTS
334 select ARCH_WANT_OPTIONAL_GPIOLIB
336 Support for Broadcom's BCMRing platform.
339 bool "Calxeda Highbank-based"
340 select ARCH_WANT_OPTIONAL_GPIOLIB
343 select ARM_TIMER_SP804
346 select GENERIC_CLOCKEVENTS
350 Support for the Calxeda Highbank SoC based boards.
353 bool "Cirrus Logic CLPS711x/EP721x-based"
355 select ARCH_USES_GETTIMEOFFSET
356 select NEED_MACH_MEMORY_H
358 Support for Cirrus Logic 711x/721x based boards.
361 bool "Cavium Networks CNS3XXX family"
363 select GENERIC_CLOCKEVENTS
365 select MIGHT_HAVE_PCI
366 select PCI_DOMAINS if PCI
368 Support for Cavium Networks CNS3XXX platform.
371 bool "Cortina Systems Gemini"
373 select ARCH_REQUIRE_GPIOLIB
374 select ARCH_USES_GETTIMEOFFSET
376 Support for the Cortina Systems Gemini family SoCs
379 bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
382 select GENERIC_CLOCKEVENTS
384 select GENERIC_IRQ_CHIP
388 Support for CSR SiRFSoC ARM Cortex A9 Platform
395 select ARCH_USES_GETTIMEOFFSET
396 select NEED_MACH_MEMORY_H
398 This is an evaluation board for the StrongARM processor available
399 from Digital. It has limited hardware on-board, including an
400 Ethernet interface, two PCMCIA sockets, two serial ports and a
409 select ARCH_REQUIRE_GPIOLIB
410 select ARCH_HAS_HOLES_MEMORYMODEL
411 select ARCH_USES_GETTIMEOFFSET
412 select NEED_MACH_MEMORY_H
413 select MULTI_IRQ_HANDLER
415 This enables support for the Cirrus EP93xx series of CPUs.
417 config ARCH_FOOTBRIDGE
421 select GENERIC_CLOCKEVENTS
423 select NEED_MACH_MEMORY_H
425 Support for systems based on the DC21285 companion chip
426 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
429 bool "Freescale MXC/iMX-based"
430 select GENERIC_CLOCKEVENTS
431 select ARCH_REQUIRE_GPIOLIB
434 select GENERIC_IRQ_CHIP
435 select HAVE_SCHED_CLOCK
436 select MULTI_IRQ_HANDLER
438 Support for Freescale MXC/iMX-based family of processors
441 bool "Freescale MXS-based"
442 select GENERIC_CLOCKEVENTS
443 select ARCH_REQUIRE_GPIOLIB
447 Support for Freescale MXS-based family of processors
450 bool "Hilscher NetX based"
454 select GENERIC_CLOCKEVENTS
455 select MULTI_IRQ_HANDLER
457 This enables support for systems based on the Hilscher NetX Soc
460 bool "Hynix HMS720x-based"
463 select ARCH_USES_GETTIMEOFFSET
465 This enables support for systems based on the Hynix HMS720x
473 select ARCH_SUPPORTS_MSI
475 select NEED_MACH_MEMORY_H
477 Support for Intel's IOP13XX (XScale) family of processors.
485 select ARCH_REQUIRE_GPIOLIB
487 Support for Intel's 80219 and IOP32X (XScale) family of
496 select ARCH_REQUIRE_GPIOLIB
498 Support for Intel's IOP33X (XScale) family of processors.
505 select ARCH_USES_GETTIMEOFFSET
506 select NEED_MACH_MEMORY_H
508 Support for Intel's IXP23xx (XScale) family of processors.
511 bool "IXP2400/2800-based"
515 select ARCH_USES_GETTIMEOFFSET
516 select NEED_MACH_MEMORY_H
518 Support for Intel's IXP2400/2800 (XScale) family of processors.
526 select GENERIC_CLOCKEVENTS
527 select HAVE_SCHED_CLOCK
528 select MIGHT_HAVE_PCI
529 select DMABOUNCE if PCI
531 Support for Intel's IXP4XX (XScale) family of processors.
537 select ARCH_REQUIRE_GPIOLIB
538 select GENERIC_CLOCKEVENTS
541 Support for the Marvell Dove SoC 88AP510
544 bool "Marvell Kirkwood"
547 select ARCH_REQUIRE_GPIOLIB
548 select GENERIC_CLOCKEVENTS
551 Support for the following Marvell Kirkwood series SoCs:
552 88F6180, 88F6192 and 88F6281.
558 select ARCH_REQUIRE_GPIOLIB
561 select USB_ARCH_HAS_OHCI
563 select GENERIC_CLOCKEVENTS
565 Support for the NXP LPC32XX family of processors
568 bool "Marvell MV78xx0"
571 select ARCH_REQUIRE_GPIOLIB
572 select GENERIC_CLOCKEVENTS
575 Support for the following Marvell MV78xx0 series SoCs:
583 select ARCH_REQUIRE_GPIOLIB
584 select GENERIC_CLOCKEVENTS
587 Support for the following Marvell Orion 5x series SoCs:
588 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
589 Orion-2 (5281), Orion-1-90 (6183).
592 bool "Marvell PXA168/910/MMP2"
594 select ARCH_REQUIRE_GPIOLIB
596 select GENERIC_CLOCKEVENTS
597 select HAVE_SCHED_CLOCK
601 select GENERIC_ALLOCATOR
603 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
606 bool "Micrel/Kendin KS8695"
608 select ARCH_REQUIRE_GPIOLIB
609 select ARCH_USES_GETTIMEOFFSET
610 select NEED_MACH_MEMORY_H
612 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
613 System-on-Chip devices.
616 bool "Nuvoton W90X900 CPU"
618 select ARCH_REQUIRE_GPIOLIB
621 select GENERIC_CLOCKEVENTS
623 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
624 At present, the w90x900 has been renamed nuc900, regarding
625 the ARM series product line, you can login the following
626 link address to know more.
628 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
629 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
635 select GENERIC_CLOCKEVENTS
638 select HAVE_SCHED_CLOCK
639 select ARCH_HAS_CPUFREQ
641 This enables support for NVIDIA Tegra based systems (Tegra APX,
642 Tegra 6xx and Tegra 2 series).
644 config ARCH_PICOXCELL
645 bool "Picochip picoXcell"
646 select ARCH_REQUIRE_GPIOLIB
647 select ARM_PATCH_PHYS_VIRT
651 select GENERIC_CLOCKEVENTS
653 select HAVE_SCHED_CLOCK
655 select MULTI_IRQ_HANDLER
659 This enables support for systems based on the Picochip picoXcell
660 family of Femtocell devices. The picoxcell support requires device tree
664 bool "Philips Nexperia PNX4008 Mobile"
667 select ARCH_USES_GETTIMEOFFSET
669 This enables support for Philips PNX4008 mobile platform.
672 bool "PXA2xx/PXA3xx-based"
675 select ARCH_HAS_CPUFREQ
678 select ARCH_REQUIRE_GPIOLIB
679 select GENERIC_CLOCKEVENTS
680 select HAVE_SCHED_CLOCK
685 select MULTI_IRQ_HANDLER
686 select ARM_CPU_SUSPEND if PM
689 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
694 select GENERIC_CLOCKEVENTS
695 select ARCH_REQUIRE_GPIOLIB
698 Support for Qualcomm MSM/QSD based systems. This runs on the
699 apps processor of the MSM/QSD and depends on a shared memory
700 interface to the modem processor which runs the baseband
701 stack and controls some vital subsystems
702 (clock and power control, etc).
705 bool "Renesas SH-Mobile / R-Mobile"
708 select HAVE_MACH_CLKDEV
709 select GENERIC_CLOCKEVENTS
712 select MULTI_IRQ_HANDLER
713 select PM_GENERIC_DOMAINS if PM
714 select NEED_MACH_MEMORY_H
716 Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
723 select ARCH_MAY_HAVE_PC_FDC
724 select HAVE_PATA_PLATFORM
727 select ARCH_SPARSEMEM_ENABLE
728 select ARCH_USES_GETTIMEOFFSET
730 select NEED_MACH_MEMORY_H
732 On the Acorn Risc-PC, Linux can support the internal IDE disk and
733 CD-ROM interface, serial and parallel port, and the floppy drive.
740 select ARCH_SPARSEMEM_ENABLE
742 select ARCH_HAS_CPUFREQ
744 select GENERIC_CLOCKEVENTS
746 select HAVE_SCHED_CLOCK
748 select ARCH_REQUIRE_GPIOLIB
750 select NEED_MACH_MEMORY_H
752 Support for StrongARM 11x0 based boards.
755 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
757 select ARCH_HAS_CPUFREQ
760 select ARCH_USES_GETTIMEOFFSET
761 select HAVE_S3C2410_I2C if I2C
763 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
764 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
765 the Samsung SMDK2410 development board (and derivatives).
767 Note, the S3C2416 and the S3C2450 are so close that they even share
768 the same SoC ID code. This means that there is no separate machine
769 directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
772 bool "Samsung S3C64XX"
780 select ARCH_USES_GETTIMEOFFSET
781 select ARCH_HAS_CPUFREQ
782 select ARCH_REQUIRE_GPIOLIB
783 select SAMSUNG_CLKSRC
784 select SAMSUNG_IRQ_VIC_TIMER
785 select S3C_GPIO_TRACK
787 select USB_ARCH_HAS_OHCI
788 select SAMSUNG_GPIOLIB_4BIT
789 select HAVE_S3C2410_I2C if I2C
790 select HAVE_S3C2410_WATCHDOG if WATCHDOG
791 select MULTI_IRQ_HANDLER
793 Samsung S3C64XX series based systems
796 bool "Samsung S5P6440 S5P6450"
802 select HAVE_S3C2410_WATCHDOG if WATCHDOG
803 select GENERIC_CLOCKEVENTS
804 select HAVE_SCHED_CLOCK
805 select HAVE_S3C2410_I2C if I2C
806 select HAVE_S3C_RTC if RTC_CLASS
807 select MULTI_IRQ_HANDLER
809 Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
813 bool "Samsung S5PC100"
818 select ARM_L1_CACHE_SHIFT_6
819 select ARCH_USES_GETTIMEOFFSET
820 select HAVE_S3C2410_I2C if I2C
821 select HAVE_S3C_RTC if RTC_CLASS
822 select HAVE_S3C2410_WATCHDOG if WATCHDOG
823 select MULTI_IRQ_HANDLER
825 Samsung S5PC100 series based systems
828 bool "Samsung S5PV210/S5PC110"
830 select ARCH_SPARSEMEM_ENABLE
831 select ARCH_HAS_HOLES_MEMORYMODEL
836 select ARM_L1_CACHE_SHIFT_6
837 select ARCH_HAS_CPUFREQ
838 select GENERIC_CLOCKEVENTS
839 select HAVE_SCHED_CLOCK
840 select HAVE_S3C2410_I2C if I2C
841 select HAVE_S3C_RTC if RTC_CLASS
842 select HAVE_S3C2410_WATCHDOG if WATCHDOG
843 select NEED_MACH_MEMORY_H
844 select MULTI_IRQ_HANDLER
846 Samsung S5PV210/S5PC110 series based systems
849 bool "SAMSUNG EXYNOS"
851 select ARCH_SPARSEMEM_ENABLE
852 select ARCH_HAS_HOLES_MEMORYMODEL
856 select ARCH_HAS_CPUFREQ
857 select GENERIC_CLOCKEVENTS
858 select HAVE_S3C_RTC if RTC_CLASS
859 select HAVE_S3C2410_I2C if I2C
860 select HAVE_S3C2410_WATCHDOG if WATCHDOG
861 select NEED_MACH_MEMORY_H
863 Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
872 select ARCH_USES_GETTIMEOFFSET
873 select NEED_MACH_MEMORY_H
875 Support for the StrongARM based Digital DNARD machine, also known
876 as "Shark" (<http://www.shark-linux.de/shark.html>).
879 bool "Telechips TCC ARM926-based systems"
884 select GENERIC_CLOCKEVENTS
886 Support for Telechips TCC ARM926-based systems.
889 bool "ST-Ericsson U300 Series"
893 select HAVE_SCHED_CLOCK
896 select ARM_PATCH_PHYS_VIRT
898 select GENERIC_CLOCKEVENTS
900 select HAVE_MACH_CLKDEV
902 select ARCH_REQUIRE_GPIOLIB
903 select NEED_MACH_MEMORY_H
904 select MULTI_IRQ_HANDLER
906 Support for ST-Ericsson U300 series mobile platforms.
909 bool "ST-Ericsson U8500 Series"
912 select GENERIC_CLOCKEVENTS
914 select ARCH_REQUIRE_GPIOLIB
915 select ARCH_HAS_CPUFREQ
917 Support for ST-Ericsson's Ux500 architecture
920 bool "STMicroelectronics Nomadik"
925 select GENERIC_CLOCKEVENTS
926 select ARCH_REQUIRE_GPIOLIB
927 select MULTI_IRQ_HANDLER
929 Support for the Nomadik platform by ST-Ericsson
933 select GENERIC_CLOCKEVENTS
934 select ARCH_REQUIRE_GPIOLIB
938 select GENERIC_ALLOCATOR
939 select GENERIC_IRQ_CHIP
940 select ARCH_HAS_HOLES_MEMORYMODEL
942 Support for TI's DaVinci platform.
947 select ARCH_REQUIRE_GPIOLIB
948 select ARCH_HAS_CPUFREQ
950 select GENERIC_CLOCKEVENTS
951 select HAVE_SCHED_CLOCK
952 select ARCH_HAS_HOLES_MEMORYMODEL
954 Support for TI's OMAP platform (OMAP1/2/3/4).
959 select ARCH_REQUIRE_GPIOLIB
962 select GENERIC_CLOCKEVENTS
964 select MULTI_IRQ_HANDLER
966 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
969 bool "VIA/WonderMedia 85xx"
972 select ARCH_HAS_CPUFREQ
973 select GENERIC_CLOCKEVENTS
974 select ARCH_REQUIRE_GPIOLIB
977 Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
980 bool "Xilinx Zynq ARM Cortex A9 Platform"
982 select GENERIC_CLOCKEVENTS
989 Support for Xilinx Zynq ARM Cortex A9 Platform
993 # This is sorted alphabetically by mach-* pathname. However, plat-*
994 # Kconfigs may be included either alphabetically (according to the
995 # plat- suffix) or along side the corresponding mach-* source.
997 source "arch/arm/mach-at91/Kconfig"
999 source "arch/arm/mach-bcmring/Kconfig"
1001 source "arch/arm/mach-clps711x/Kconfig"
1003 source "arch/arm/mach-cns3xxx/Kconfig"
1005 source "arch/arm/mach-davinci/Kconfig"
1007 source "arch/arm/mach-dove/Kconfig"
1009 source "arch/arm/mach-ep93xx/Kconfig"
1011 source "arch/arm/mach-footbridge/Kconfig"
1013 source "arch/arm/mach-gemini/Kconfig"
1015 source "arch/arm/mach-h720x/Kconfig"
1017 source "arch/arm/mach-integrator/Kconfig"
1019 source "arch/arm/mach-iop32x/Kconfig"
1021 source "arch/arm/mach-iop33x/Kconfig"
1023 source "arch/arm/mach-iop13xx/Kconfig"
1025 source "arch/arm/mach-ixp4xx/Kconfig"
1027 source "arch/arm/mach-ixp2000/Kconfig"
1029 source "arch/arm/mach-ixp23xx/Kconfig"
1031 source "arch/arm/mach-kirkwood/Kconfig"
1033 source "arch/arm/mach-ks8695/Kconfig"
1035 source "arch/arm/mach-lpc32xx/Kconfig"
1037 source "arch/arm/mach-msm/Kconfig"
1039 source "arch/arm/mach-mv78xx0/Kconfig"
1041 source "arch/arm/plat-mxc/Kconfig"
1043 source "arch/arm/mach-mxs/Kconfig"
1045 source "arch/arm/mach-netx/Kconfig"
1047 source "arch/arm/mach-nomadik/Kconfig"
1048 source "arch/arm/plat-nomadik/Kconfig"
1050 source "arch/arm/plat-omap/Kconfig"
1052 source "arch/arm/mach-omap1/Kconfig"
1054 source "arch/arm/mach-omap2/Kconfig"
1056 source "arch/arm/mach-orion5x/Kconfig"
1058 source "arch/arm/mach-pxa/Kconfig"
1059 source "arch/arm/plat-pxa/Kconfig"
1061 source "arch/arm/mach-mmp/Kconfig"
1063 source "arch/arm/mach-realview/Kconfig"
1065 source "arch/arm/mach-sa1100/Kconfig"
1067 source "arch/arm/plat-samsung/Kconfig"
1068 source "arch/arm/plat-s3c24xx/Kconfig"
1069 source "arch/arm/plat-s5p/Kconfig"
1071 source "arch/arm/plat-spear/Kconfig"
1073 source "arch/arm/plat-tcc/Kconfig"
1076 source "arch/arm/mach-s3c2410/Kconfig"
1077 source "arch/arm/mach-s3c2412/Kconfig"
1078 source "arch/arm/mach-s3c2416/Kconfig"
1079 source "arch/arm/mach-s3c2440/Kconfig"
1080 source "arch/arm/mach-s3c2443/Kconfig"
1084 source "arch/arm/mach-s3c64xx/Kconfig"
1087 source "arch/arm/mach-s5p64x0/Kconfig"
1089 source "arch/arm/mach-s5pc100/Kconfig"
1091 source "arch/arm/mach-s5pv210/Kconfig"
1093 source "arch/arm/mach-exynos/Kconfig"
1095 source "arch/arm/mach-shmobile/Kconfig"
1097 source "arch/arm/mach-tegra/Kconfig"
1099 source "arch/arm/mach-u300/Kconfig"
1101 source "arch/arm/mach-ux500/Kconfig"
1103 source "arch/arm/mach-versatile/Kconfig"
1105 source "arch/arm/mach-vexpress/Kconfig"
1106 source "arch/arm/plat-versatile/Kconfig"
1108 source "arch/arm/mach-vt8500/Kconfig"
1110 source "arch/arm/mach-w90x900/Kconfig"
1112 # Definitions to make life easier
1118 select GENERIC_CLOCKEVENTS
1119 select HAVE_SCHED_CLOCK
1124 select GENERIC_IRQ_CHIP
1125 select HAVE_SCHED_CLOCK
1130 config PLAT_VERSATILE
1133 config ARM_TIMER_SP804
1137 source arch/arm/mm/Kconfig
1140 bool "Enable iWMMXt support"
1141 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1142 default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1144 Enable support for iWMMXt context switching at run time if
1145 running on a CPU that supports it.
1147 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1150 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1154 depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
1155 (!ARCH_OMAP3 || OMAP3_EMU)
1159 config MULTI_IRQ_HANDLER
1162 Allow each machine to specify it's own IRQ handler at run time.
1165 source "arch/arm/Kconfig-nommu"
1168 config ARM_ERRATA_411920
1169 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1170 depends on CPU_V6 || CPU_V6K
1172 Invalidation of the Instruction Cache operation can
1173 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1174 It does not affect the MPCore. This option enables the ARM Ltd.
1175 recommended workaround.
1177 config ARM_ERRATA_430973
1178 bool "ARM errata: Stale prediction on replaced interworking branch"
1181 This option enables the workaround for the 430973 Cortex-A8
1182 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1183 interworking branch is replaced with another code sequence at the
1184 same virtual address, whether due to self-modifying code or virtual
1185 to physical address re-mapping, Cortex-A8 does not recover from the
1186 stale interworking branch prediction. This results in Cortex-A8
1187 executing the new code sequence in the incorrect ARM or Thumb state.
1188 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1189 and also flushes the branch target cache at every context switch.
1190 Note that setting specific bits in the ACTLR register may not be
1191 available in non-secure mode.
1193 config ARM_ERRATA_458693
1194 bool "ARM errata: Processor deadlock when a false hazard is created"
1197 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1198 erratum. For very specific sequences of memory operations, it is
1199 possible for a hazard condition intended for a cache line to instead
1200 be incorrectly associated with a different cache line. This false
1201 hazard might then cause a processor deadlock. The workaround enables
1202 the L1 caching of the NEON accesses and disables the PLD instruction
1203 in the ACTLR register. Note that setting specific bits in the ACTLR
1204 register may not be available in non-secure mode.
1206 config ARM_ERRATA_460075
1207 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1210 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1211 erratum. Any asynchronous access to the L2 cache may encounter a
1212 situation in which recent store transactions to the L2 cache are lost
1213 and overwritten with stale memory contents from external memory. The
1214 workaround disables the write-allocate mode for the L2 cache via the
1215 ACTLR register. Note that setting specific bits in the ACTLR register
1216 may not be available in non-secure mode.
1218 config ARM_ERRATA_742230
1219 bool "ARM errata: DMB operation may be faulty"
1220 depends on CPU_V7 && SMP
1222 This option enables the workaround for the 742230 Cortex-A9
1223 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1224 between two write operations may not ensure the correct visibility
1225 ordering of the two writes. This workaround sets a specific bit in
1226 the diagnostic register of the Cortex-A9 which causes the DMB
1227 instruction to behave as a DSB, ensuring the correct behaviour of
1230 config ARM_ERRATA_742231
1231 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1232 depends on CPU_V7 && SMP
1234 This option enables the workaround for the 742231 Cortex-A9
1235 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1236 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1237 accessing some data located in the same cache line, may get corrupted
1238 data due to bad handling of the address hazard when the line gets
1239 replaced from one of the CPUs at the same time as another CPU is
1240 accessing it. This workaround sets specific bits in the diagnostic
1241 register of the Cortex-A9 which reduces the linefill issuing
1242 capabilities of the processor.
1244 config PL310_ERRATA_588369
1245 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1246 depends on CACHE_L2X0
1248 The PL310 L2 cache controller implements three types of Clean &
1249 Invalidate maintenance operations: by Physical Address
1250 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1251 They are architecturally defined to behave as the execution of a
1252 clean operation followed immediately by an invalidate operation,
1253 both performing to the same memory location. This functionality
1254 is not correctly implemented in PL310 as clean lines are not
1255 invalidated as a result of these operations.
1257 config ARM_ERRATA_720789
1258 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1259 depends on CPU_V7 && SMP
1261 This option enables the workaround for the 720789 Cortex-A9 (prior to
1262 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1263 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1264 As a consequence of this erratum, some TLB entries which should be
1265 invalidated are not, resulting in an incoherency in the system page
1266 tables. The workaround changes the TLB flushing routines to invalidate
1267 entries regardless of the ASID.
1269 config PL310_ERRATA_727915
1270 bool "Background Clean & Invalidate by Way operation can cause data corruption"
1271 depends on CACHE_L2X0
1273 PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1274 operation (offset 0x7FC). This operation runs in background so that
1275 PL310 can handle normal accesses while it is in progress. Under very
1276 rare circumstances, due to this erratum, write data can be lost when
1277 PL310 treats a cacheable write transaction during a Clean &
1278 Invalidate by Way operation.
1280 config ARM_ERRATA_743622
1281 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1284 This option enables the workaround for the 743622 Cortex-A9
1285 (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1286 optimisation in the Cortex-A9 Store Buffer may lead to data
1287 corruption. This workaround sets a specific bit in the diagnostic
1288 register of the Cortex-A9 which disables the Store Buffer
1289 optimisation, preventing the defect from occurring. This has no
1290 visible impact on the overall performance or power consumption of the
1293 config ARM_ERRATA_751472
1294 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1295 depends on CPU_V7 && SMP
1297 This option enables the workaround for the 751472 Cortex-A9 (prior
1298 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1299 completion of a following broadcasted operation if the second
1300 operation is received by a CPU before the ICIALLUIS has completed,
1301 potentially leading to corrupted entries in the cache or TLB.
1303 config ARM_ERRATA_753970
1304 bool "ARM errata: cache sync operation may be faulty"
1305 depends on CACHE_PL310
1307 This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1309 Under some condition the effect of cache sync operation on
1310 the store buffer still remains when the operation completes.
1311 This means that the store buffer is always asked to drain and
1312 this prevents it from merging any further writes. The workaround
1313 is to replace the normal offset of cache sync operation (0x730)
1314 by another offset targeting an unmapped PL310 register 0x740.
1315 This has the same effect as the cache sync operation: store buffer
1316 drain and waiting for all buffers empty.
1318 config ARM_ERRATA_754322
1319 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1322 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1323 r3p*) erratum. A speculative memory access may cause a page table walk
1324 which starts prior to an ASID switch but completes afterwards. This
1325 can populate the micro-TLB with a stale entry which may be hit with
1326 the new ASID. This workaround places two dsb instructions in the mm
1327 switching code so that no page table walks can cross the ASID switch.
1329 config ARM_ERRATA_754327
1330 bool "ARM errata: no automatic Store Buffer drain"
1331 depends on CPU_V7 && SMP
1333 This option enables the workaround for the 754327 Cortex-A9 (prior to
1334 r2p0) erratum. The Store Buffer does not have any automatic draining
1335 mechanism and therefore a livelock may occur if an external agent
1336 continuously polls a memory location waiting to observe an update.
1337 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1338 written polling loops from denying visibility of updates to memory.
1340 config ARM_ERRATA_364296
1341 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1342 depends on CPU_V6 && !SMP
1344 This options enables the workaround for the 364296 ARM1136
1345 r0p2 erratum (possible cache data corruption with
1346 hit-under-miss enabled). It sets the undocumented bit 31 in
1347 the auxiliary control register and the FI bit in the control
1348 register, thus disabling hit-under-miss without putting the
1349 processor into full low interrupt latency mode. ARM11MPCore
1352 config ARM_ERRATA_764369
1353 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1354 depends on CPU_V7 && SMP
1356 This option enables the workaround for erratum 764369
1357 affecting Cortex-A9 MPCore with two or more processors (all
1358 current revisions). Under certain timing circumstances, a data
1359 cache line maintenance operation by MVA targeting an Inner
1360 Shareable memory region may fail to proceed up to either the
1361 Point of Coherency or to the Point of Unification of the
1362 system. This workaround adds a DSB instruction before the
1363 relevant cache maintenance functions and sets a specific bit
1364 in the diagnostic control register of the SCU.
1368 source "arch/arm/common/Kconfig"
1378 Find out whether you have ISA slots on your motherboard. ISA is the
1379 name of a bus system, i.e. the way the CPU talks to the other stuff
1380 inside your box. Other bus systems are PCI, EISA, MicroChannel
1381 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1382 newer boards don't support it. If you have ISA, say Y, otherwise N.
1384 # Select ISA DMA controller support
1389 # Select ISA DMA interface
1394 bool "PCI support" if MIGHT_HAVE_PCI
1396 Find out whether you have a PCI motherboard. PCI is the name of a
1397 bus system, i.e. the way the CPU talks to the other stuff inside
1398 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1399 VESA. If you have PCI, say Y, otherwise N.
1405 config PCI_NANOENGINE
1406 bool "BSE nanoEngine PCI support"
1407 depends on SA1100_NANOENGINE
1409 Enable PCI on the BSE nanoEngine board.
1414 # Select the host bridge type
1415 config PCI_HOST_VIA82C505
1417 depends on PCI && ARCH_SHARK
1420 config PCI_HOST_ITE8152
1422 depends on PCI && MACH_ARMCORE
1426 source "drivers/pci/Kconfig"
1428 source "drivers/pcmcia/Kconfig"
1432 menu "Kernel Features"
1434 source "kernel/time/Kconfig"
1437 bool "Symmetric Multi-Processing"
1438 depends on CPU_V6K || CPU_V7
1439 depends on GENERIC_CLOCKEVENTS
1440 depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1441 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1442 ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1443 ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
1445 select USE_GENERIC_SMP_HELPERS
1446 select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1448 This enables support for systems with more than one CPU. If you have
1449 a system with only one CPU, like most personal computers, say N. If
1450 you have a system with more than one CPU, say Y.
1452 If you say N here, the kernel will run on single and multiprocessor
1453 machines, but will use only one CPU of a multiprocessor machine. If
1454 you say Y here, the kernel will run on many, but not all, single
1455 processor machines. On a single processor machine, the kernel will
1456 run faster if you say N here.
1458 See also <file:Documentation/x86/i386/IO-APIC.txt>,
1459 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1460 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1462 If you don't know what to do here, say N.
1465 bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1466 depends on EXPERIMENTAL
1467 depends on SMP && !XIP_KERNEL
1470 SMP kernels contain instructions which fail on non-SMP processors.
1471 Enabling this option allows the kernel to modify itself to make
1472 these instructions safe. Disabling it allows about 1K of space
1475 If you don't know what to do here, say Y.
1477 config ARM_CPU_TOPOLOGY
1478 bool "Support cpu topology definition"
1479 depends on SMP && CPU_V7
1482 Support ARM cpu topology definition. The MPIDR register defines
1483 affinity between processors which is then used to describe the cpu
1484 topology of an ARM System.
1487 bool "Multi-core scheduler support"
1488 depends on ARM_CPU_TOPOLOGY
1490 Multi-core scheduler support improves the CPU scheduler's decision
1491 making when dealing with multi-core CPU chips at a cost of slightly
1492 increased overhead in some places. If unsure say N here.
1495 bool "SMT scheduler support"
1496 depends on ARM_CPU_TOPOLOGY
1498 Improves the CPU scheduler's decision making when dealing with
1499 MultiThreading at a cost of slightly increased overhead in some
1500 places. If unsure say N here.
1505 This option enables support for the ARM system coherency unit
1512 This options enables support for the ARM timer and watchdog unit
1515 prompt "Memory split"
1518 Select the desired split between kernel and user memory.
1520 If you are not absolutely sure what you are doing, leave this
1524 bool "3G/1G user/kernel split"
1526 bool "2G/2G user/kernel split"
1528 bool "1G/3G user/kernel split"
1533 default 0x40000000 if VMSPLIT_1G
1534 default 0x80000000 if VMSPLIT_2G
1538 int "Maximum number of CPUs (2-32)"
1544 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1545 depends on SMP && HOTPLUG && EXPERIMENTAL
1547 Say Y here to experiment with turning CPUs off and on. CPUs
1548 can be controlled through /sys/devices/system/cpu.
1551 bool "Use local timer interrupts"
1554 select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1556 Enable support for local timers on SMP platforms, rather then the
1557 legacy IPI broadcast method. Local timers allows the system
1558 accounting to be spread across the timer interval, preventing a
1559 "thundering herd" at every timer tick.
1561 source kernel/Kconfig.preempt
1565 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1566 ARCH_S5PV210 || ARCH_EXYNOS4
1567 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1568 default AT91_TIMER_HZ if ARCH_AT91
1569 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1572 config THUMB2_KERNEL
1573 bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1574 depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
1576 select ARM_ASM_UNIFIED
1579 By enabling this option, the kernel will be compiled in
1580 Thumb-2 mode. A compiler/assembler that understand the unified
1581 ARM-Thumb syntax is needed.
1585 config THUMB2_AVOID_R_ARM_THM_JUMP11
1586 bool "Work around buggy Thumb-2 short branch relocations in gas"
1587 depends on THUMB2_KERNEL && MODULES
1590 Various binutils versions can resolve Thumb-2 branches to
1591 locally-defined, preemptible global symbols as short-range "b.n"
1592 branch instructions.
1594 This is a problem, because there's no guarantee the final
1595 destination of the symbol, or any candidate locations for a
1596 trampoline, are within range of the branch. For this reason, the
1597 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1598 relocation in modules at all, and it makes little sense to add
1601 The symptom is that the kernel fails with an "unsupported
1602 relocation" error when loading some modules.
1604 Until fixed tools are available, passing
1605 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1606 code which hits this problem, at the cost of a bit of extra runtime
1607 stack usage in some cases.
1609 The problem is described in more detail at:
1610 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1612 Only Thumb-2 kernels are affected.
1614 Unless you are sure your tools don't have this problem, say Y.
1616 config ARM_ASM_UNIFIED
1620 bool "Use the ARM EABI to compile the kernel"
1622 This option allows for the kernel to be compiled using the latest
1623 ARM ABI (aka EABI). This is only useful if you are using a user
1624 space environment that is also compiled with EABI.
1626 Since there are major incompatibilities between the legacy ABI and
1627 EABI, especially with regard to structure member alignment, this
1628 option also changes the kernel syscall calling convention to
1629 disambiguate both ABIs and allow for backward compatibility support
1630 (selected with CONFIG_OABI_COMPAT).
1632 To use this you need GCC version 4.0.0 or later.
1635 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1636 depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
1639 This option preserves the old syscall interface along with the
1640 new (ARM EABI) one. It also provides a compatibility layer to
1641 intercept syscalls that have structure arguments which layout
1642 in memory differs between the legacy ABI and the new ARM EABI
1643 (only for non "thumb" binaries). This option adds a tiny
1644 overhead to all syscalls and produces a slightly larger kernel.
1645 If you know you'll be using only pure EABI user space then you
1646 can say N here. If this option is not selected and you attempt
1647 to execute a legacy ABI binary then the result will be
1648 UNPREDICTABLE (in fact it can be predicted that it won't work
1649 at all). If in doubt say Y.
1651 config ARCH_HAS_HOLES_MEMORYMODEL
1654 config ARCH_SPARSEMEM_ENABLE
1657 config ARCH_SPARSEMEM_DEFAULT
1658 def_bool ARCH_SPARSEMEM_ENABLE
1660 config ARCH_SELECT_MEMORY_MODEL
1661 def_bool ARCH_SPARSEMEM_ENABLE
1663 config HAVE_ARCH_PFN_VALID
1664 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1667 bool "High Memory Support"
1670 The address space of ARM processors is only 4 Gigabytes large
1671 and it has to accommodate user address space, kernel address
1672 space as well as some memory mapped IO. That means that, if you
1673 have a large amount of physical memory and/or IO, not all of the
1674 memory can be "permanently mapped" by the kernel. The physical
1675 memory that is not permanently mapped is called "high memory".
1677 Depending on the selected kernel/user memory split, minimum
1678 vmalloc space and actual amount of RAM, you may not need this
1679 option which should result in a slightly faster kernel.
1684 bool "Allocate 2nd-level pagetables from highmem"
1687 config HW_PERF_EVENTS
1688 bool "Enable hardware performance counter support for perf events"
1689 depends on PERF_EVENTS && CPU_HAS_PMU
1692 Enable hardware performance counter support for perf events. If
1693 disabled, perf events will use software events only.
1697 config FORCE_MAX_ZONEORDER
1698 int "Maximum zone order" if ARCH_SHMOBILE
1699 range 11 64 if ARCH_SHMOBILE
1700 default "9" if SA1111
1703 The kernel memory allocator divides physically contiguous memory
1704 blocks into "zones", where each zone is a power of two number of
1705 pages. This option selects the largest power of two that the kernel
1706 keeps in the memory allocator. If you need to allocate very large
1707 blocks of physically contiguous memory, then you may need to
1708 increase this value.
1710 This config option is actually maximum order plus one. For example,
1711 a value of 11 means that the largest free memory block is 2^10 pages.
1714 bool "Timer and CPU usage LEDs"
1715 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1716 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1717 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1718 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1719 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1720 ARCH_AT91 || ARCH_DAVINCI || \
1721 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1723 If you say Y here, the LEDs on your machine will be used
1724 to provide useful information about your current system status.
1726 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1727 be able to select which LEDs are active using the options below. If
1728 you are compiling a kernel for the EBSA-110 or the LART however, the
1729 red LED will simply flash regularly to indicate that the system is
1730 still functional. It is safe to say Y here if you have a CATS
1731 system, but the driver will do nothing.
1734 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1735 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1736 || MACH_OMAP_PERSEUS2
1738 depends on !GENERIC_CLOCKEVENTS
1739 default y if ARCH_EBSA110
1741 If you say Y here, one of the system LEDs (the green one on the
1742 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1743 will flash regularly to indicate that the system is still
1744 operational. This is mainly useful to kernel hackers who are
1745 debugging unstable kernels.
1747 The LART uses the same LED for both Timer LED and CPU usage LED
1748 functions. You may choose to use both, but the Timer LED function
1749 will overrule the CPU usage LED.
1752 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1754 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1755 || MACH_OMAP_PERSEUS2
1758 If you say Y here, the red LED will be used to give a good real
1759 time indication of CPU usage, by lighting whenever the idle task
1760 is not currently executing.
1762 The LART uses the same LED for both Timer LED and CPU usage LED
1763 functions. You may choose to use both, but the Timer LED function
1764 will overrule the CPU usage LED.
1766 config ALIGNMENT_TRAP
1768 depends on CPU_CP15_MMU
1769 default y if !ARCH_EBSA110
1770 select HAVE_PROC_CPU if PROC_FS
1772 ARM processors cannot fetch/store information which is not
1773 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1774 address divisible by 4. On 32-bit ARM processors, these non-aligned
1775 fetch/store instructions will be emulated in software if you say
1776 here, which has a severe performance impact. This is necessary for
1777 correct operation of some network protocols. With an IP-only
1778 configuration it is safe to say N, otherwise say Y.
1780 config UACCESS_WITH_MEMCPY
1781 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1782 depends on MMU && EXPERIMENTAL
1783 default y if CPU_FEROCEON
1785 Implement faster copy_to_user and clear_user methods for CPU
1786 cores where a 8-word STM instruction give significantly higher
1787 memory write throughput than a sequence of individual 32bit stores.
1789 A possible side effect is a slight increase in scheduling latency
1790 between threads sharing the same address space if they invoke
1791 such copy operations with large buffers.
1793 However, if the CPU data cache is using a write-allocate mode,
1794 this option is unlikely to provide any performance gain.
1798 prompt "Enable seccomp to safely compute untrusted bytecode"
1800 This kernel feature is useful for number crunching applications
1801 that may need to compute untrusted bytecode during their
1802 execution. By using pipes or other transports made available to
1803 the process as file descriptors supporting the read/write
1804 syscalls, it's possible to isolate those applications in
1805 their own address space using seccomp. Once seccomp is
1806 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1807 and the task is only allowed to execute a few safe syscalls
1808 defined by each seccomp mode.
1810 config CC_STACKPROTECTOR
1811 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1812 depends on EXPERIMENTAL
1814 This option turns on the -fstack-protector GCC feature. This
1815 feature puts, at the beginning of functions, a canary value on
1816 the stack just before the return address, and validates
1817 the value just before actually returning. Stack based buffer
1818 overflows (that need to overwrite this return address) now also
1819 overwrite the canary, which gets detected and the attack is then
1820 neutralized via a kernel panic.
1821 This feature requires gcc version 4.2 or above.
1823 config DEPRECATED_PARAM_STRUCT
1824 bool "Provide old way to pass kernel parameters"
1826 This was deprecated in 2001 and announced to live on for 5 years.
1827 Some old boot loaders still use this way.
1834 bool "Flattened Device Tree support"
1836 select OF_EARLY_FLATTREE
1839 Include support for flattened device tree machine descriptions.
1841 # Compressed boot loader in ROM. Yes, we really want to ask about
1842 # TEXT and BSS so we preserve their values in the config files.
1843 config ZBOOT_ROM_TEXT
1844 hex "Compressed ROM boot loader base address"
1847 The physical address at which the ROM-able zImage is to be
1848 placed in the target. Platforms which normally make use of
1849 ROM-able zImage formats normally set this to a suitable
1850 value in their defconfig file.
1852 If ZBOOT_ROM is not enabled, this has no effect.
1854 config ZBOOT_ROM_BSS
1855 hex "Compressed ROM boot loader BSS address"
1858 The base address of an area of read/write memory in the target
1859 for the ROM-able zImage which must be available while the
1860 decompressor is running. It must be large enough to hold the
1861 entire decompressed kernel plus an additional 128 KiB.
1862 Platforms which normally make use of ROM-able zImage formats
1863 normally set this to a suitable value in their defconfig file.
1865 If ZBOOT_ROM is not enabled, this has no effect.
1868 bool "Compressed boot loader in ROM/flash"
1869 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1871 Say Y here if you intend to execute your compressed kernel image
1872 (zImage) directly from ROM or flash. If unsure, say N.
1875 prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1876 depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1877 default ZBOOT_ROM_NONE
1879 Include experimental SD/MMC loading code in the ROM-able zImage.
1880 With this enabled it is possible to write the the ROM-able zImage
1881 kernel image to an MMC or SD card and boot the kernel straight
1882 from the reset vector. At reset the processor Mask ROM will load
1883 the first part of the the ROM-able zImage which in turn loads the
1884 rest the kernel image to RAM.
1886 config ZBOOT_ROM_NONE
1887 bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1889 Do not load image from SD or MMC
1891 config ZBOOT_ROM_MMCIF
1892 bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1894 Load image from MMCIF hardware block.
1896 config ZBOOT_ROM_SH_MOBILE_SDHI
1897 bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1899 Load image from SDHI hardware block
1903 config ARM_APPENDED_DTB
1904 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1905 depends on OF && !ZBOOT_ROM && EXPERIMENTAL
1907 With this option, the boot code will look for a device tree binary
1908 (DTB) appended to zImage
1909 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1911 This is meant as a backward compatibility convenience for those
1912 systems with a bootloader that can't be upgraded to accommodate
1913 the documented boot protocol using a device tree.
1915 Beware that there is very little in terms of protection against
1916 this option being confused by leftover garbage in memory that might
1917 look like a DTB header after a reboot if no actual DTB is appended
1918 to zImage. Do not leave this option active in a production kernel
1919 if you don't intend to always append a DTB. Proper passing of the
1920 location into r2 of a bootloader provided DTB is always preferable
1923 config ARM_ATAG_DTB_COMPAT
1924 bool "Supplement the appended DTB with traditional ATAG information"
1925 depends on ARM_APPENDED_DTB
1927 Some old bootloaders can't be updated to a DTB capable one, yet
1928 they provide ATAGs with memory configuration, the ramdisk address,
1929 the kernel cmdline string, etc. Such information is dynamically
1930 provided by the bootloader and can't always be stored in a static
1931 DTB. To allow a device tree enabled kernel to be used with such
1932 bootloaders, this option allows zImage to extract the information
1933 from the ATAG list and store it at run time into the appended DTB.
1936 string "Default kernel command string"
1939 On some architectures (EBSA110 and CATS), there is currently no way
1940 for the boot loader to pass arguments to the kernel. For these
1941 architectures, you should supply some command-line options at build
1942 time by entering them here. As a minimum, you should specify the
1943 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1946 prompt "Kernel command line type" if CMDLINE != ""
1947 default CMDLINE_FROM_BOOTLOADER
1949 config CMDLINE_FROM_BOOTLOADER
1950 bool "Use bootloader kernel arguments if available"
1952 Uses the command-line options passed by the boot loader. If
1953 the boot loader doesn't provide any, the default kernel command
1954 string provided in CMDLINE will be used.
1956 config CMDLINE_EXTEND
1957 bool "Extend bootloader kernel arguments"
1959 The command-line arguments provided by the boot loader will be
1960 appended to the default kernel command string.
1962 config CMDLINE_FORCE
1963 bool "Always use the default kernel command string"
1965 Always use the default kernel command string, even if the boot
1966 loader passes other arguments to the kernel.
1967 This is useful if you cannot or don't want to change the
1968 command-line options your boot loader passes to the kernel.
1972 bool "Kernel Execute-In-Place from ROM"
1973 depends on !ZBOOT_ROM
1975 Execute-In-Place allows the kernel to run from non-volatile storage
1976 directly addressable by the CPU, such as NOR flash. This saves RAM
1977 space since the text section of the kernel is not loaded from flash
1978 to RAM. Read-write sections, such as the data section and stack,
1979 are still copied to RAM. The XIP kernel is not compressed since
1980 it has to run directly from flash, so it will take more space to
1981 store it. The flash address used to link the kernel object files,
1982 and for storing it, is configuration dependent. Therefore, if you
1983 say Y here, you must know the proper physical address where to
1984 store the kernel image depending on your own flash memory usage.
1986 Also note that the make target becomes "make xipImage" rather than
1987 "make zImage" or "make Image". The final kernel binary to put in
1988 ROM memory will be arch/arm/boot/xipImage.
1992 config XIP_PHYS_ADDR
1993 hex "XIP Kernel Physical Location"
1994 depends on XIP_KERNEL
1995 default "0x00080000"
1997 This is the physical address in your flash memory the kernel will
1998 be linked for and stored to. This address is dependent on your
2002 bool "Kexec system call (EXPERIMENTAL)"
2003 depends on EXPERIMENTAL
2005 kexec is a system call that implements the ability to shutdown your
2006 current kernel, and to start another kernel. It is like a reboot
2007 but it is independent of the system firmware. And like a reboot
2008 you can start any kernel with it, not just Linux.
2010 It is an ongoing process to be certain the hardware in a machine
2011 is properly shutdown, so do not be surprised if this code does not
2012 initially work for you. It may help to enable device hotplugging
2016 bool "Export atags in procfs"
2020 Should the atags used to boot the kernel be exported in an "atags"
2021 file in procfs. Useful with kexec.
2024 bool "Build kdump crash kernel (EXPERIMENTAL)"
2025 depends on EXPERIMENTAL
2027 Generate crash dump after being started by kexec. This should
2028 be normally only set in special crash dump kernels which are
2029 loaded in the main kernel with kexec-tools into a specially
2030 reserved region and then later executed after a crash by
2031 kdump/kexec. The crash dump kernel must be compiled to a
2032 memory address not used by the main kernel
2034 For more details see Documentation/kdump/kdump.txt
2036 config AUTO_ZRELADDR
2037 bool "Auto calculation of the decompressed kernel image address"
2038 depends on !ZBOOT_ROM && !ARCH_U300
2040 ZRELADDR is the physical address where the decompressed kernel
2041 image will be placed. If AUTO_ZRELADDR is selected, the address
2042 will be determined at run-time by masking the current IP with
2043 0xf8000000. This assumes the zImage being placed in the first 128MB
2044 from start of memory.
2048 menu "CPU Power Management"
2052 source "drivers/cpufreq/Kconfig"
2055 tristate "CPUfreq driver for i.MX CPUs"
2056 depends on ARCH_MXC && CPU_FREQ
2058 This enables the CPUfreq driver for i.MX CPUs.
2060 config CPU_FREQ_SA1100
2063 config CPU_FREQ_SA1110
2066 config CPU_FREQ_INTEGRATOR
2067 tristate "CPUfreq driver for ARM Integrator CPUs"
2068 depends on ARCH_INTEGRATOR && CPU_FREQ
2071 This enables the CPUfreq driver for ARM Integrator CPUs.
2073 For details, take a look at <file:Documentation/cpu-freq>.
2079 depends on CPU_FREQ && ARCH_PXA && PXA25x
2081 select CPU_FREQ_TABLE
2082 select CPU_FREQ_DEFAULT_GOV_USERSPACE
2087 Internal configuration node for common cpufreq on Samsung SoC
2089 config CPU_FREQ_S3C24XX
2090 bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2091 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
2094 This enables the CPUfreq driver for the Samsung S3C24XX family
2097 For details, take a look at <file:Documentation/cpu-freq>.
2101 config CPU_FREQ_S3C24XX_PLL
2102 bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2103 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
2105 Compile in support for changing the PLL frequency from the
2106 S3C24XX series CPUfreq driver. The PLL takes time to settle
2107 after a frequency change, so by default it is not enabled.
2109 This also means that the PLL tables for the selected CPU(s) will
2110 be built which may increase the size of the kernel image.
2112 config CPU_FREQ_S3C24XX_DEBUG
2113 bool "Debug CPUfreq Samsung driver core"
2114 depends on CPU_FREQ_S3C24XX
2116 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
2118 config CPU_FREQ_S3C24XX_IODEBUG
2119 bool "Debug CPUfreq Samsung driver IO timing"
2120 depends on CPU_FREQ_S3C24XX
2122 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
2124 config CPU_FREQ_S3C24XX_DEBUGFS
2125 bool "Export debugfs for CPUFreq"
2126 depends on CPU_FREQ_S3C24XX && DEBUG_FS
2128 Export status information via debugfs.
2132 source "drivers/cpuidle/Kconfig"
2136 menu "Floating point emulation"
2138 comment "At least one emulation must be selected"
2141 bool "NWFPE math emulation"
2142 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2144 Say Y to include the NWFPE floating point emulator in the kernel.
2145 This is necessary to run most binaries. Linux does not currently
2146 support floating point hardware so you need to say Y here even if
2147 your machine has an FPA or floating point co-processor podule.
2149 You may say N here if you are going to load the Acorn FPEmulator
2150 early in the bootup.
2153 bool "Support extended precision"
2154 depends on FPE_NWFPE
2156 Say Y to include 80-bit support in the kernel floating-point
2157 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2158 Note that gcc does not generate 80-bit operations by default,
2159 so in most cases this option only enlarges the size of the
2160 floating point emulator without any good reason.
2162 You almost surely want to say N here.
2165 bool "FastFPE math emulation (EXPERIMENTAL)"
2166 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
2168 Say Y here to include the FAST floating point emulator in the kernel.
2169 This is an experimental much faster emulator which now also has full
2170 precision for the mantissa. It does not support any exceptions.
2171 It is very simple, and approximately 3-6 times faster than NWFPE.
2173 It should be sufficient for most programs. It may be not suitable
2174 for scientific calculations, but you have to check this for yourself.
2175 If you do not feel you need a faster FP emulation you should better
2179 bool "VFP-format floating point maths"
2180 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2182 Say Y to include VFP support code in the kernel. This is needed
2183 if your hardware includes a VFP unit.
2185 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2186 release notes and additional status information.
2188 Say N if your target does not have VFP hardware.
2196 bool "Advanced SIMD (NEON) Extension support"
2197 depends on VFPv3 && CPU_V7
2199 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2204 menu "Userspace binary formats"
2206 source "fs/Kconfig.binfmt"
2209 tristate "RISC OS personality"
2212 Say Y here to include the kernel code necessary if you want to run
2213 Acorn RISC OS/Arthur binaries under Linux. This code is still very
2214 experimental; if this sounds frightening, say N and sleep in peace.
2215 You can also say M here to compile this support as a module (which
2216 will be called arthur).
2220 menu "Power management options"
2222 source "kernel/power/Kconfig"
2224 config ARCH_SUSPEND_POSSIBLE
2225 depends on !ARCH_S5PC100
2226 depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2227 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
2230 config ARM_CPU_SUSPEND
2235 source "net/Kconfig"
2237 source "drivers/Kconfig"
2241 source "arch/arm/Kconfig.debug"
2243 source "security/Kconfig"
2245 source "crypto/Kconfig"
2247 source "lib/Kconfig"