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
658 This enables support for systems based on the Picochip picoXcell
659 family of Femtocell devices. The picoxcell support requires device tree
663 bool "Philips Nexperia PNX4008 Mobile"
666 select ARCH_USES_GETTIMEOFFSET
668 This enables support for Philips PNX4008 mobile platform.
671 bool "PXA2xx/PXA3xx-based"
674 select ARCH_HAS_CPUFREQ
677 select ARCH_REQUIRE_GPIOLIB
678 select GENERIC_CLOCKEVENTS
679 select HAVE_SCHED_CLOCK
684 select MULTI_IRQ_HANDLER
685 select ARM_CPU_SUSPEND if PM
688 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
693 select GENERIC_CLOCKEVENTS
694 select ARCH_REQUIRE_GPIOLIB
697 Support for Qualcomm MSM/QSD based systems. This runs on the
698 apps processor of the MSM/QSD and depends on a shared memory
699 interface to the modem processor which runs the baseband
700 stack and controls some vital subsystems
701 (clock and power control, etc).
704 bool "Renesas SH-Mobile / R-Mobile"
707 select HAVE_MACH_CLKDEV
708 select GENERIC_CLOCKEVENTS
711 select MULTI_IRQ_HANDLER
712 select PM_GENERIC_DOMAINS if PM
713 select NEED_MACH_MEMORY_H
715 Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
722 select ARCH_MAY_HAVE_PC_FDC
723 select HAVE_PATA_PLATFORM
726 select ARCH_SPARSEMEM_ENABLE
727 select ARCH_USES_GETTIMEOFFSET
729 select NEED_MACH_MEMORY_H
731 On the Acorn Risc-PC, Linux can support the internal IDE disk and
732 CD-ROM interface, serial and parallel port, and the floppy drive.
739 select ARCH_SPARSEMEM_ENABLE
741 select ARCH_HAS_CPUFREQ
743 select GENERIC_CLOCKEVENTS
745 select HAVE_SCHED_CLOCK
747 select ARCH_REQUIRE_GPIOLIB
749 select NEED_MACH_MEMORY_H
751 Support for StrongARM 11x0 based boards.
754 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
756 select ARCH_HAS_CPUFREQ
759 select ARCH_USES_GETTIMEOFFSET
760 select HAVE_S3C2410_I2C if I2C
762 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
763 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
764 the Samsung SMDK2410 development board (and derivatives).
766 Note, the S3C2416 and the S3C2450 are so close that they even share
767 the same SoC ID code. This means that there is no separate machine
768 directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
771 bool "Samsung S3C64XX"
779 select ARCH_USES_GETTIMEOFFSET
780 select ARCH_HAS_CPUFREQ
781 select ARCH_REQUIRE_GPIOLIB
782 select SAMSUNG_CLKSRC
783 select SAMSUNG_IRQ_VIC_TIMER
784 select S3C_GPIO_TRACK
786 select USB_ARCH_HAS_OHCI
787 select SAMSUNG_GPIOLIB_4BIT
788 select HAVE_S3C2410_I2C if I2C
789 select HAVE_S3C2410_WATCHDOG if WATCHDOG
790 select MULTI_IRQ_HANDLER
792 Samsung S3C64XX series based systems
795 bool "Samsung S5P6440 S5P6450"
801 select HAVE_S3C2410_WATCHDOG if WATCHDOG
802 select GENERIC_CLOCKEVENTS
803 select HAVE_SCHED_CLOCK
804 select HAVE_S3C2410_I2C if I2C
805 select HAVE_S3C_RTC if RTC_CLASS
806 select MULTI_IRQ_HANDLER
808 Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
812 bool "Samsung S5PC100"
817 select ARM_L1_CACHE_SHIFT_6
818 select ARCH_USES_GETTIMEOFFSET
819 select HAVE_S3C2410_I2C if I2C
820 select HAVE_S3C_RTC if RTC_CLASS
821 select HAVE_S3C2410_WATCHDOG if WATCHDOG
822 select MULTI_IRQ_HANDLER
824 Samsung S5PC100 series based systems
827 bool "Samsung S5PV210/S5PC110"
829 select ARCH_SPARSEMEM_ENABLE
830 select ARCH_HAS_HOLES_MEMORYMODEL
835 select ARM_L1_CACHE_SHIFT_6
836 select ARCH_HAS_CPUFREQ
837 select GENERIC_CLOCKEVENTS
838 select HAVE_SCHED_CLOCK
839 select HAVE_S3C2410_I2C if I2C
840 select HAVE_S3C_RTC if RTC_CLASS
841 select HAVE_S3C2410_WATCHDOG if WATCHDOG
842 select NEED_MACH_MEMORY_H
843 select MULTI_IRQ_HANDLER
845 Samsung S5PV210/S5PC110 series based systems
848 bool "SAMSUNG EXYNOS"
850 select ARCH_SPARSEMEM_ENABLE
851 select ARCH_HAS_HOLES_MEMORYMODEL
855 select ARCH_HAS_CPUFREQ
856 select GENERIC_CLOCKEVENTS
857 select HAVE_S3C_RTC if RTC_CLASS
858 select HAVE_S3C2410_I2C if I2C
859 select HAVE_S3C2410_WATCHDOG if WATCHDOG
860 select NEED_MACH_MEMORY_H
862 Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
871 select ARCH_USES_GETTIMEOFFSET
872 select NEED_MACH_MEMORY_H
874 Support for the StrongARM based Digital DNARD machine, also known
875 as "Shark" (<http://www.shark-linux.de/shark.html>).
878 bool "Telechips TCC ARM926-based systems"
883 select GENERIC_CLOCKEVENTS
885 Support for Telechips TCC ARM926-based systems.
888 bool "ST-Ericsson U300 Series"
892 select HAVE_SCHED_CLOCK
895 select ARM_PATCH_PHYS_VIRT
897 select GENERIC_CLOCKEVENTS
899 select HAVE_MACH_CLKDEV
901 select ARCH_REQUIRE_GPIOLIB
902 select NEED_MACH_MEMORY_H
903 select MULTI_IRQ_HANDLER
905 Support for ST-Ericsson U300 series mobile platforms.
908 bool "ST-Ericsson U8500 Series"
911 select GENERIC_CLOCKEVENTS
913 select ARCH_REQUIRE_GPIOLIB
914 select ARCH_HAS_CPUFREQ
916 Support for ST-Ericsson's Ux500 architecture
919 bool "STMicroelectronics Nomadik"
924 select GENERIC_CLOCKEVENTS
925 select ARCH_REQUIRE_GPIOLIB
926 select MULTI_IRQ_HANDLER
928 Support for the Nomadik platform by ST-Ericsson
932 select GENERIC_CLOCKEVENTS
933 select ARCH_REQUIRE_GPIOLIB
937 select GENERIC_ALLOCATOR
938 select GENERIC_IRQ_CHIP
939 select ARCH_HAS_HOLES_MEMORYMODEL
941 Support for TI's DaVinci platform.
946 select ARCH_REQUIRE_GPIOLIB
947 select ARCH_HAS_CPUFREQ
949 select GENERIC_CLOCKEVENTS
950 select HAVE_SCHED_CLOCK
951 select ARCH_HAS_HOLES_MEMORYMODEL
953 Support for TI's OMAP platform (OMAP1/2/3/4).
958 select ARCH_REQUIRE_GPIOLIB
961 select GENERIC_CLOCKEVENTS
963 select MULTI_IRQ_HANDLER
965 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
968 bool "VIA/WonderMedia 85xx"
971 select ARCH_HAS_CPUFREQ
972 select GENERIC_CLOCKEVENTS
973 select ARCH_REQUIRE_GPIOLIB
976 Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
979 bool "Xilinx Zynq ARM Cortex A9 Platform"
981 select GENERIC_CLOCKEVENTS
988 Support for Xilinx Zynq ARM Cortex A9 Platform
992 # This is sorted alphabetically by mach-* pathname. However, plat-*
993 # Kconfigs may be included either alphabetically (according to the
994 # plat- suffix) or along side the corresponding mach-* source.
996 source "arch/arm/mach-at91/Kconfig"
998 source "arch/arm/mach-bcmring/Kconfig"
1000 source "arch/arm/mach-clps711x/Kconfig"
1002 source "arch/arm/mach-cns3xxx/Kconfig"
1004 source "arch/arm/mach-davinci/Kconfig"
1006 source "arch/arm/mach-dove/Kconfig"
1008 source "arch/arm/mach-ep93xx/Kconfig"
1010 source "arch/arm/mach-footbridge/Kconfig"
1012 source "arch/arm/mach-gemini/Kconfig"
1014 source "arch/arm/mach-h720x/Kconfig"
1016 source "arch/arm/mach-integrator/Kconfig"
1018 source "arch/arm/mach-iop32x/Kconfig"
1020 source "arch/arm/mach-iop33x/Kconfig"
1022 source "arch/arm/mach-iop13xx/Kconfig"
1024 source "arch/arm/mach-ixp4xx/Kconfig"
1026 source "arch/arm/mach-ixp2000/Kconfig"
1028 source "arch/arm/mach-ixp23xx/Kconfig"
1030 source "arch/arm/mach-kirkwood/Kconfig"
1032 source "arch/arm/mach-ks8695/Kconfig"
1034 source "arch/arm/mach-lpc32xx/Kconfig"
1036 source "arch/arm/mach-msm/Kconfig"
1038 source "arch/arm/mach-mv78xx0/Kconfig"
1040 source "arch/arm/plat-mxc/Kconfig"
1042 source "arch/arm/mach-mxs/Kconfig"
1044 source "arch/arm/mach-netx/Kconfig"
1046 source "arch/arm/mach-nomadik/Kconfig"
1047 source "arch/arm/plat-nomadik/Kconfig"
1049 source "arch/arm/plat-omap/Kconfig"
1051 source "arch/arm/mach-omap1/Kconfig"
1053 source "arch/arm/mach-omap2/Kconfig"
1055 source "arch/arm/mach-orion5x/Kconfig"
1057 source "arch/arm/mach-pxa/Kconfig"
1058 source "arch/arm/plat-pxa/Kconfig"
1060 source "arch/arm/mach-mmp/Kconfig"
1062 source "arch/arm/mach-realview/Kconfig"
1064 source "arch/arm/mach-sa1100/Kconfig"
1066 source "arch/arm/plat-samsung/Kconfig"
1067 source "arch/arm/plat-s3c24xx/Kconfig"
1068 source "arch/arm/plat-s5p/Kconfig"
1070 source "arch/arm/plat-spear/Kconfig"
1072 source "arch/arm/plat-tcc/Kconfig"
1075 source "arch/arm/mach-s3c2410/Kconfig"
1076 source "arch/arm/mach-s3c2412/Kconfig"
1077 source "arch/arm/mach-s3c2416/Kconfig"
1078 source "arch/arm/mach-s3c2440/Kconfig"
1079 source "arch/arm/mach-s3c2443/Kconfig"
1083 source "arch/arm/mach-s3c64xx/Kconfig"
1086 source "arch/arm/mach-s5p64x0/Kconfig"
1088 source "arch/arm/mach-s5pc100/Kconfig"
1090 source "arch/arm/mach-s5pv210/Kconfig"
1092 source "arch/arm/mach-exynos/Kconfig"
1094 source "arch/arm/mach-shmobile/Kconfig"
1096 source "arch/arm/mach-tegra/Kconfig"
1098 source "arch/arm/mach-u300/Kconfig"
1100 source "arch/arm/mach-ux500/Kconfig"
1102 source "arch/arm/mach-versatile/Kconfig"
1104 source "arch/arm/mach-vexpress/Kconfig"
1105 source "arch/arm/plat-versatile/Kconfig"
1107 source "arch/arm/mach-vt8500/Kconfig"
1109 source "arch/arm/mach-w90x900/Kconfig"
1111 # Definitions to make life easier
1117 select GENERIC_CLOCKEVENTS
1118 select HAVE_SCHED_CLOCK
1123 select GENERIC_IRQ_CHIP
1124 select HAVE_SCHED_CLOCK
1129 config PLAT_VERSATILE
1132 config ARM_TIMER_SP804
1136 source arch/arm/mm/Kconfig
1139 bool "Enable iWMMXt support"
1140 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1141 default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1143 Enable support for iWMMXt context switching at run time if
1144 running on a CPU that supports it.
1146 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1149 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1153 depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
1154 (!ARCH_OMAP3 || OMAP3_EMU)
1158 config MULTI_IRQ_HANDLER
1161 Allow each machine to specify it's own IRQ handler at run time.
1164 source "arch/arm/Kconfig-nommu"
1167 config ARM_ERRATA_411920
1168 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1169 depends on CPU_V6 || CPU_V6K
1171 Invalidation of the Instruction Cache operation can
1172 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1173 It does not affect the MPCore. This option enables the ARM Ltd.
1174 recommended workaround.
1176 config ARM_ERRATA_430973
1177 bool "ARM errata: Stale prediction on replaced interworking branch"
1180 This option enables the workaround for the 430973 Cortex-A8
1181 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1182 interworking branch is replaced with another code sequence at the
1183 same virtual address, whether due to self-modifying code or virtual
1184 to physical address re-mapping, Cortex-A8 does not recover from the
1185 stale interworking branch prediction. This results in Cortex-A8
1186 executing the new code sequence in the incorrect ARM or Thumb state.
1187 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1188 and also flushes the branch target cache at every context switch.
1189 Note that setting specific bits in the ACTLR register may not be
1190 available in non-secure mode.
1192 config ARM_ERRATA_458693
1193 bool "ARM errata: Processor deadlock when a false hazard is created"
1196 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1197 erratum. For very specific sequences of memory operations, it is
1198 possible for a hazard condition intended for a cache line to instead
1199 be incorrectly associated with a different cache line. This false
1200 hazard might then cause a processor deadlock. The workaround enables
1201 the L1 caching of the NEON accesses and disables the PLD instruction
1202 in the ACTLR register. Note that setting specific bits in the ACTLR
1203 register may not be available in non-secure mode.
1205 config ARM_ERRATA_460075
1206 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1209 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1210 erratum. Any asynchronous access to the L2 cache may encounter a
1211 situation in which recent store transactions to the L2 cache are lost
1212 and overwritten with stale memory contents from external memory. The
1213 workaround disables the write-allocate mode for the L2 cache via the
1214 ACTLR register. Note that setting specific bits in the ACTLR register
1215 may not be available in non-secure mode.
1217 config ARM_ERRATA_742230
1218 bool "ARM errata: DMB operation may be faulty"
1219 depends on CPU_V7 && SMP
1221 This option enables the workaround for the 742230 Cortex-A9
1222 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1223 between two write operations may not ensure the correct visibility
1224 ordering of the two writes. This workaround sets a specific bit in
1225 the diagnostic register of the Cortex-A9 which causes the DMB
1226 instruction to behave as a DSB, ensuring the correct behaviour of
1229 config ARM_ERRATA_742231
1230 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1231 depends on CPU_V7 && SMP
1233 This option enables the workaround for the 742231 Cortex-A9
1234 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1235 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1236 accessing some data located in the same cache line, may get corrupted
1237 data due to bad handling of the address hazard when the line gets
1238 replaced from one of the CPUs at the same time as another CPU is
1239 accessing it. This workaround sets specific bits in the diagnostic
1240 register of the Cortex-A9 which reduces the linefill issuing
1241 capabilities of the processor.
1243 config PL310_ERRATA_588369
1244 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1245 depends on CACHE_L2X0
1247 The PL310 L2 cache controller implements three types of Clean &
1248 Invalidate maintenance operations: by Physical Address
1249 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1250 They are architecturally defined to behave as the execution of a
1251 clean operation followed immediately by an invalidate operation,
1252 both performing to the same memory location. This functionality
1253 is not correctly implemented in PL310 as clean lines are not
1254 invalidated as a result of these operations.
1256 config ARM_ERRATA_720789
1257 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1258 depends on CPU_V7 && SMP
1260 This option enables the workaround for the 720789 Cortex-A9 (prior to
1261 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1262 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1263 As a consequence of this erratum, some TLB entries which should be
1264 invalidated are not, resulting in an incoherency in the system page
1265 tables. The workaround changes the TLB flushing routines to invalidate
1266 entries regardless of the ASID.
1268 config PL310_ERRATA_727915
1269 bool "Background Clean & Invalidate by Way operation can cause data corruption"
1270 depends on CACHE_L2X0
1272 PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1273 operation (offset 0x7FC). This operation runs in background so that
1274 PL310 can handle normal accesses while it is in progress. Under very
1275 rare circumstances, due to this erratum, write data can be lost when
1276 PL310 treats a cacheable write transaction during a Clean &
1277 Invalidate by Way operation.
1279 config ARM_ERRATA_743622
1280 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1283 This option enables the workaround for the 743622 Cortex-A9
1284 (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1285 optimisation in the Cortex-A9 Store Buffer may lead to data
1286 corruption. This workaround sets a specific bit in the diagnostic
1287 register of the Cortex-A9 which disables the Store Buffer
1288 optimisation, preventing the defect from occurring. This has no
1289 visible impact on the overall performance or power consumption of the
1292 config ARM_ERRATA_751472
1293 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1294 depends on CPU_V7 && SMP
1296 This option enables the workaround for the 751472 Cortex-A9 (prior
1297 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1298 completion of a following broadcasted operation if the second
1299 operation is received by a CPU before the ICIALLUIS has completed,
1300 potentially leading to corrupted entries in the cache or TLB.
1302 config ARM_ERRATA_753970
1303 bool "ARM errata: cache sync operation may be faulty"
1304 depends on CACHE_PL310
1306 This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1308 Under some condition the effect of cache sync operation on
1309 the store buffer still remains when the operation completes.
1310 This means that the store buffer is always asked to drain and
1311 this prevents it from merging any further writes. The workaround
1312 is to replace the normal offset of cache sync operation (0x730)
1313 by another offset targeting an unmapped PL310 register 0x740.
1314 This has the same effect as the cache sync operation: store buffer
1315 drain and waiting for all buffers empty.
1317 config ARM_ERRATA_754322
1318 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1321 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1322 r3p*) erratum. A speculative memory access may cause a page table walk
1323 which starts prior to an ASID switch but completes afterwards. This
1324 can populate the micro-TLB with a stale entry which may be hit with
1325 the new ASID. This workaround places two dsb instructions in the mm
1326 switching code so that no page table walks can cross the ASID switch.
1328 config ARM_ERRATA_754327
1329 bool "ARM errata: no automatic Store Buffer drain"
1330 depends on CPU_V7 && SMP
1332 This option enables the workaround for the 754327 Cortex-A9 (prior to
1333 r2p0) erratum. The Store Buffer does not have any automatic draining
1334 mechanism and therefore a livelock may occur if an external agent
1335 continuously polls a memory location waiting to observe an update.
1336 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1337 written polling loops from denying visibility of updates to memory.
1339 config ARM_ERRATA_364296
1340 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1341 depends on CPU_V6 && !SMP
1343 This options enables the workaround for the 364296 ARM1136
1344 r0p2 erratum (possible cache data corruption with
1345 hit-under-miss enabled). It sets the undocumented bit 31 in
1346 the auxiliary control register and the FI bit in the control
1347 register, thus disabling hit-under-miss without putting the
1348 processor into full low interrupt latency mode. ARM11MPCore
1351 config ARM_ERRATA_764369
1352 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1353 depends on CPU_V7 && SMP
1355 This option enables the workaround for erratum 764369
1356 affecting Cortex-A9 MPCore with two or more processors (all
1357 current revisions). Under certain timing circumstances, a data
1358 cache line maintenance operation by MVA targeting an Inner
1359 Shareable memory region may fail to proceed up to either the
1360 Point of Coherency or to the Point of Unification of the
1361 system. This workaround adds a DSB instruction before the
1362 relevant cache maintenance functions and sets a specific bit
1363 in the diagnostic control register of the SCU.
1367 source "arch/arm/common/Kconfig"
1377 Find out whether you have ISA slots on your motherboard. ISA is the
1378 name of a bus system, i.e. the way the CPU talks to the other stuff
1379 inside your box. Other bus systems are PCI, EISA, MicroChannel
1380 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1381 newer boards don't support it. If you have ISA, say Y, otherwise N.
1383 # Select ISA DMA controller support
1388 # Select ISA DMA interface
1393 bool "PCI support" if MIGHT_HAVE_PCI
1395 Find out whether you have a PCI motherboard. PCI is the name of a
1396 bus system, i.e. the way the CPU talks to the other stuff inside
1397 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1398 VESA. If you have PCI, say Y, otherwise N.
1404 config PCI_NANOENGINE
1405 bool "BSE nanoEngine PCI support"
1406 depends on SA1100_NANOENGINE
1408 Enable PCI on the BSE nanoEngine board.
1413 # Select the host bridge type
1414 config PCI_HOST_VIA82C505
1416 depends on PCI && ARCH_SHARK
1419 config PCI_HOST_ITE8152
1421 depends on PCI && MACH_ARMCORE
1425 source "drivers/pci/Kconfig"
1427 source "drivers/pcmcia/Kconfig"
1431 menu "Kernel Features"
1433 source "kernel/time/Kconfig"
1436 bool "Symmetric Multi-Processing"
1437 depends on CPU_V6K || CPU_V7
1438 depends on GENERIC_CLOCKEVENTS
1439 depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1440 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1441 ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1442 ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
1444 select USE_GENERIC_SMP_HELPERS
1445 select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1447 This enables support for systems with more than one CPU. If you have
1448 a system with only one CPU, like most personal computers, say N. If
1449 you have a system with more than one CPU, say Y.
1451 If you say N here, the kernel will run on single and multiprocessor
1452 machines, but will use only one CPU of a multiprocessor machine. If
1453 you say Y here, the kernel will run on many, but not all, single
1454 processor machines. On a single processor machine, the kernel will
1455 run faster if you say N here.
1457 See also <file:Documentation/x86/i386/IO-APIC.txt>,
1458 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1459 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1461 If you don't know what to do here, say N.
1464 bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1465 depends on EXPERIMENTAL
1466 depends on SMP && !XIP_KERNEL
1469 SMP kernels contain instructions which fail on non-SMP processors.
1470 Enabling this option allows the kernel to modify itself to make
1471 these instructions safe. Disabling it allows about 1K of space
1474 If you don't know what to do here, say Y.
1476 config ARM_CPU_TOPOLOGY
1477 bool "Support cpu topology definition"
1478 depends on SMP && CPU_V7
1481 Support ARM cpu topology definition. The MPIDR register defines
1482 affinity between processors which is then used to describe the cpu
1483 topology of an ARM System.
1486 bool "Multi-core scheduler support"
1487 depends on ARM_CPU_TOPOLOGY
1489 Multi-core scheduler support improves the CPU scheduler's decision
1490 making when dealing with multi-core CPU chips at a cost of slightly
1491 increased overhead in some places. If unsure say N here.
1494 bool "SMT scheduler support"
1495 depends on ARM_CPU_TOPOLOGY
1497 Improves the CPU scheduler's decision making when dealing with
1498 MultiThreading at a cost of slightly increased overhead in some
1499 places. If unsure say N here.
1504 This option enables support for the ARM system coherency unit
1511 This options enables support for the ARM timer and watchdog unit
1514 prompt "Memory split"
1517 Select the desired split between kernel and user memory.
1519 If you are not absolutely sure what you are doing, leave this
1523 bool "3G/1G user/kernel split"
1525 bool "2G/2G user/kernel split"
1527 bool "1G/3G user/kernel split"
1532 default 0x40000000 if VMSPLIT_1G
1533 default 0x80000000 if VMSPLIT_2G
1537 int "Maximum number of CPUs (2-32)"
1543 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1544 depends on SMP && HOTPLUG && EXPERIMENTAL
1546 Say Y here to experiment with turning CPUs off and on. CPUs
1547 can be controlled through /sys/devices/system/cpu.
1550 bool "Use local timer interrupts"
1553 select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1555 Enable support for local timers on SMP platforms, rather then the
1556 legacy IPI broadcast method. Local timers allows the system
1557 accounting to be spread across the timer interval, preventing a
1558 "thundering herd" at every timer tick.
1560 source kernel/Kconfig.preempt
1564 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1565 ARCH_S5PV210 || ARCH_EXYNOS4
1566 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1567 default AT91_TIMER_HZ if ARCH_AT91
1568 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1571 config THUMB2_KERNEL
1572 bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1573 depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
1575 select ARM_ASM_UNIFIED
1578 By enabling this option, the kernel will be compiled in
1579 Thumb-2 mode. A compiler/assembler that understand the unified
1580 ARM-Thumb syntax is needed.
1584 config THUMB2_AVOID_R_ARM_THM_JUMP11
1585 bool "Work around buggy Thumb-2 short branch relocations in gas"
1586 depends on THUMB2_KERNEL && MODULES
1589 Various binutils versions can resolve Thumb-2 branches to
1590 locally-defined, preemptible global symbols as short-range "b.n"
1591 branch instructions.
1593 This is a problem, because there's no guarantee the final
1594 destination of the symbol, or any candidate locations for a
1595 trampoline, are within range of the branch. For this reason, the
1596 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1597 relocation in modules at all, and it makes little sense to add
1600 The symptom is that the kernel fails with an "unsupported
1601 relocation" error when loading some modules.
1603 Until fixed tools are available, passing
1604 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1605 code which hits this problem, at the cost of a bit of extra runtime
1606 stack usage in some cases.
1608 The problem is described in more detail at:
1609 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1611 Only Thumb-2 kernels are affected.
1613 Unless you are sure your tools don't have this problem, say Y.
1615 config ARM_ASM_UNIFIED
1619 bool "Use the ARM EABI to compile the kernel"
1621 This option allows for the kernel to be compiled using the latest
1622 ARM ABI (aka EABI). This is only useful if you are using a user
1623 space environment that is also compiled with EABI.
1625 Since there are major incompatibilities between the legacy ABI and
1626 EABI, especially with regard to structure member alignment, this
1627 option also changes the kernel syscall calling convention to
1628 disambiguate both ABIs and allow for backward compatibility support
1629 (selected with CONFIG_OABI_COMPAT).
1631 To use this you need GCC version 4.0.0 or later.
1634 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1635 depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
1638 This option preserves the old syscall interface along with the
1639 new (ARM EABI) one. It also provides a compatibility layer to
1640 intercept syscalls that have structure arguments which layout
1641 in memory differs between the legacy ABI and the new ARM EABI
1642 (only for non "thumb" binaries). This option adds a tiny
1643 overhead to all syscalls and produces a slightly larger kernel.
1644 If you know you'll be using only pure EABI user space then you
1645 can say N here. If this option is not selected and you attempt
1646 to execute a legacy ABI binary then the result will be
1647 UNPREDICTABLE (in fact it can be predicted that it won't work
1648 at all). If in doubt say Y.
1650 config ARCH_HAS_HOLES_MEMORYMODEL
1653 config ARCH_SPARSEMEM_ENABLE
1656 config ARCH_SPARSEMEM_DEFAULT
1657 def_bool ARCH_SPARSEMEM_ENABLE
1659 config ARCH_SELECT_MEMORY_MODEL
1660 def_bool ARCH_SPARSEMEM_ENABLE
1662 config HAVE_ARCH_PFN_VALID
1663 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1666 bool "High Memory Support"
1669 The address space of ARM processors is only 4 Gigabytes large
1670 and it has to accommodate user address space, kernel address
1671 space as well as some memory mapped IO. That means that, if you
1672 have a large amount of physical memory and/or IO, not all of the
1673 memory can be "permanently mapped" by the kernel. The physical
1674 memory that is not permanently mapped is called "high memory".
1676 Depending on the selected kernel/user memory split, minimum
1677 vmalloc space and actual amount of RAM, you may not need this
1678 option which should result in a slightly faster kernel.
1683 bool "Allocate 2nd-level pagetables from highmem"
1686 config HW_PERF_EVENTS
1687 bool "Enable hardware performance counter support for perf events"
1688 depends on PERF_EVENTS && CPU_HAS_PMU
1691 Enable hardware performance counter support for perf events. If
1692 disabled, perf events will use software events only.
1696 config FORCE_MAX_ZONEORDER
1697 int "Maximum zone order" if ARCH_SHMOBILE
1698 range 11 64 if ARCH_SHMOBILE
1699 default "9" if SA1111
1702 The kernel memory allocator divides physically contiguous memory
1703 blocks into "zones", where each zone is a power of two number of
1704 pages. This option selects the largest power of two that the kernel
1705 keeps in the memory allocator. If you need to allocate very large
1706 blocks of physically contiguous memory, then you may need to
1707 increase this value.
1709 This config option is actually maximum order plus one. For example,
1710 a value of 11 means that the largest free memory block is 2^10 pages.
1713 bool "Timer and CPU usage LEDs"
1714 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1715 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1716 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1717 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1718 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1719 ARCH_AT91 || ARCH_DAVINCI || \
1720 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1722 If you say Y here, the LEDs on your machine will be used
1723 to provide useful information about your current system status.
1725 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1726 be able to select which LEDs are active using the options below. If
1727 you are compiling a kernel for the EBSA-110 or the LART however, the
1728 red LED will simply flash regularly to indicate that the system is
1729 still functional. It is safe to say Y here if you have a CATS
1730 system, but the driver will do nothing.
1733 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1734 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1735 || MACH_OMAP_PERSEUS2
1737 depends on !GENERIC_CLOCKEVENTS
1738 default y if ARCH_EBSA110
1740 If you say Y here, one of the system LEDs (the green one on the
1741 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1742 will flash regularly to indicate that the system is still
1743 operational. This is mainly useful to kernel hackers who are
1744 debugging unstable kernels.
1746 The LART uses the same LED for both Timer LED and CPU usage LED
1747 functions. You may choose to use both, but the Timer LED function
1748 will overrule the CPU usage LED.
1751 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1753 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1754 || MACH_OMAP_PERSEUS2
1757 If you say Y here, the red LED will be used to give a good real
1758 time indication of CPU usage, by lighting whenever the idle task
1759 is not currently executing.
1761 The LART uses the same LED for both Timer LED and CPU usage LED
1762 functions. You may choose to use both, but the Timer LED function
1763 will overrule the CPU usage LED.
1765 config ALIGNMENT_TRAP
1767 depends on CPU_CP15_MMU
1768 default y if !ARCH_EBSA110
1769 select HAVE_PROC_CPU if PROC_FS
1771 ARM processors cannot fetch/store information which is not
1772 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1773 address divisible by 4. On 32-bit ARM processors, these non-aligned
1774 fetch/store instructions will be emulated in software if you say
1775 here, which has a severe performance impact. This is necessary for
1776 correct operation of some network protocols. With an IP-only
1777 configuration it is safe to say N, otherwise say Y.
1779 config UACCESS_WITH_MEMCPY
1780 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1781 depends on MMU && EXPERIMENTAL
1782 default y if CPU_FEROCEON
1784 Implement faster copy_to_user and clear_user methods for CPU
1785 cores where a 8-word STM instruction give significantly higher
1786 memory write throughput than a sequence of individual 32bit stores.
1788 A possible side effect is a slight increase in scheduling latency
1789 between threads sharing the same address space if they invoke
1790 such copy operations with large buffers.
1792 However, if the CPU data cache is using a write-allocate mode,
1793 this option is unlikely to provide any performance gain.
1797 prompt "Enable seccomp to safely compute untrusted bytecode"
1799 This kernel feature is useful for number crunching applications
1800 that may need to compute untrusted bytecode during their
1801 execution. By using pipes or other transports made available to
1802 the process as file descriptors supporting the read/write
1803 syscalls, it's possible to isolate those applications in
1804 their own address space using seccomp. Once seccomp is
1805 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1806 and the task is only allowed to execute a few safe syscalls
1807 defined by each seccomp mode.
1809 config CC_STACKPROTECTOR
1810 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1811 depends on EXPERIMENTAL
1813 This option turns on the -fstack-protector GCC feature. This
1814 feature puts, at the beginning of functions, a canary value on
1815 the stack just before the return address, and validates
1816 the value just before actually returning. Stack based buffer
1817 overflows (that need to overwrite this return address) now also
1818 overwrite the canary, which gets detected and the attack is then
1819 neutralized via a kernel panic.
1820 This feature requires gcc version 4.2 or above.
1822 config DEPRECATED_PARAM_STRUCT
1823 bool "Provide old way to pass kernel parameters"
1825 This was deprecated in 2001 and announced to live on for 5 years.
1826 Some old boot loaders still use this way.
1833 bool "Flattened Device Tree support"
1835 select OF_EARLY_FLATTREE
1838 Include support for flattened device tree machine descriptions.
1840 # Compressed boot loader in ROM. Yes, we really want to ask about
1841 # TEXT and BSS so we preserve their values in the config files.
1842 config ZBOOT_ROM_TEXT
1843 hex "Compressed ROM boot loader base address"
1846 The physical address at which the ROM-able zImage is to be
1847 placed in the target. Platforms which normally make use of
1848 ROM-able zImage formats normally set this to a suitable
1849 value in their defconfig file.
1851 If ZBOOT_ROM is not enabled, this has no effect.
1853 config ZBOOT_ROM_BSS
1854 hex "Compressed ROM boot loader BSS address"
1857 The base address of an area of read/write memory in the target
1858 for the ROM-able zImage which must be available while the
1859 decompressor is running. It must be large enough to hold the
1860 entire decompressed kernel plus an additional 128 KiB.
1861 Platforms which normally make use of ROM-able zImage formats
1862 normally set this to a suitable value in their defconfig file.
1864 If ZBOOT_ROM is not enabled, this has no effect.
1867 bool "Compressed boot loader in ROM/flash"
1868 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1870 Say Y here if you intend to execute your compressed kernel image
1871 (zImage) directly from ROM or flash. If unsure, say N.
1874 prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1875 depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1876 default ZBOOT_ROM_NONE
1878 Include experimental SD/MMC loading code in the ROM-able zImage.
1879 With this enabled it is possible to write the the ROM-able zImage
1880 kernel image to an MMC or SD card and boot the kernel straight
1881 from the reset vector. At reset the processor Mask ROM will load
1882 the first part of the the ROM-able zImage which in turn loads the
1883 rest the kernel image to RAM.
1885 config ZBOOT_ROM_NONE
1886 bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1888 Do not load image from SD or MMC
1890 config ZBOOT_ROM_MMCIF
1891 bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1893 Load image from MMCIF hardware block.
1895 config ZBOOT_ROM_SH_MOBILE_SDHI
1896 bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1898 Load image from SDHI hardware block
1902 config ARM_APPENDED_DTB
1903 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1904 depends on OF && !ZBOOT_ROM && EXPERIMENTAL
1906 With this option, the boot code will look for a device tree binary
1907 (DTB) appended to zImage
1908 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1910 This is meant as a backward compatibility convenience for those
1911 systems with a bootloader that can't be upgraded to accommodate
1912 the documented boot protocol using a device tree.
1914 Beware that there is very little in terms of protection against
1915 this option being confused by leftover garbage in memory that might
1916 look like a DTB header after a reboot if no actual DTB is appended
1917 to zImage. Do not leave this option active in a production kernel
1918 if you don't intend to always append a DTB. Proper passing of the
1919 location into r2 of a bootloader provided DTB is always preferable
1922 config ARM_ATAG_DTB_COMPAT
1923 bool "Supplement the appended DTB with traditional ATAG information"
1924 depends on ARM_APPENDED_DTB
1926 Some old bootloaders can't be updated to a DTB capable one, yet
1927 they provide ATAGs with memory configuration, the ramdisk address,
1928 the kernel cmdline string, etc. Such information is dynamically
1929 provided by the bootloader and can't always be stored in a static
1930 DTB. To allow a device tree enabled kernel to be used with such
1931 bootloaders, this option allows zImage to extract the information
1932 from the ATAG list and store it at run time into the appended DTB.
1935 string "Default kernel command string"
1938 On some architectures (EBSA110 and CATS), there is currently no way
1939 for the boot loader to pass arguments to the kernel. For these
1940 architectures, you should supply some command-line options at build
1941 time by entering them here. As a minimum, you should specify the
1942 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1945 prompt "Kernel command line type" if CMDLINE != ""
1946 default CMDLINE_FROM_BOOTLOADER
1948 config CMDLINE_FROM_BOOTLOADER
1949 bool "Use bootloader kernel arguments if available"
1951 Uses the command-line options passed by the boot loader. If
1952 the boot loader doesn't provide any, the default kernel command
1953 string provided in CMDLINE will be used.
1955 config CMDLINE_EXTEND
1956 bool "Extend bootloader kernel arguments"
1958 The command-line arguments provided by the boot loader will be
1959 appended to the default kernel command string.
1961 config CMDLINE_FORCE
1962 bool "Always use the default kernel command string"
1964 Always use the default kernel command string, even if the boot
1965 loader passes other arguments to the kernel.
1966 This is useful if you cannot or don't want to change the
1967 command-line options your boot loader passes to the kernel.
1971 bool "Kernel Execute-In-Place from ROM"
1972 depends on !ZBOOT_ROM
1974 Execute-In-Place allows the kernel to run from non-volatile storage
1975 directly addressable by the CPU, such as NOR flash. This saves RAM
1976 space since the text section of the kernel is not loaded from flash
1977 to RAM. Read-write sections, such as the data section and stack,
1978 are still copied to RAM. The XIP kernel is not compressed since
1979 it has to run directly from flash, so it will take more space to
1980 store it. The flash address used to link the kernel object files,
1981 and for storing it, is configuration dependent. Therefore, if you
1982 say Y here, you must know the proper physical address where to
1983 store the kernel image depending on your own flash memory usage.
1985 Also note that the make target becomes "make xipImage" rather than
1986 "make zImage" or "make Image". The final kernel binary to put in
1987 ROM memory will be arch/arm/boot/xipImage.
1991 config XIP_PHYS_ADDR
1992 hex "XIP Kernel Physical Location"
1993 depends on XIP_KERNEL
1994 default "0x00080000"
1996 This is the physical address in your flash memory the kernel will
1997 be linked for and stored to. This address is dependent on your
2001 bool "Kexec system call (EXPERIMENTAL)"
2002 depends on EXPERIMENTAL
2004 kexec is a system call that implements the ability to shutdown your
2005 current kernel, and to start another kernel. It is like a reboot
2006 but it is independent of the system firmware. And like a reboot
2007 you can start any kernel with it, not just Linux.
2009 It is an ongoing process to be certain the hardware in a machine
2010 is properly shutdown, so do not be surprised if this code does not
2011 initially work for you. It may help to enable device hotplugging
2015 bool "Export atags in procfs"
2019 Should the atags used to boot the kernel be exported in an "atags"
2020 file in procfs. Useful with kexec.
2023 bool "Build kdump crash kernel (EXPERIMENTAL)"
2024 depends on EXPERIMENTAL
2026 Generate crash dump after being started by kexec. This should
2027 be normally only set in special crash dump kernels which are
2028 loaded in the main kernel with kexec-tools into a specially
2029 reserved region and then later executed after a crash by
2030 kdump/kexec. The crash dump kernel must be compiled to a
2031 memory address not used by the main kernel
2033 For more details see Documentation/kdump/kdump.txt
2035 config AUTO_ZRELADDR
2036 bool "Auto calculation of the decompressed kernel image address"
2037 depends on !ZBOOT_ROM && !ARCH_U300
2039 ZRELADDR is the physical address where the decompressed kernel
2040 image will be placed. If AUTO_ZRELADDR is selected, the address
2041 will be determined at run-time by masking the current IP with
2042 0xf8000000. This assumes the zImage being placed in the first 128MB
2043 from start of memory.
2047 menu "CPU Power Management"
2051 source "drivers/cpufreq/Kconfig"
2054 tristate "CPUfreq driver for i.MX CPUs"
2055 depends on ARCH_MXC && CPU_FREQ
2057 This enables the CPUfreq driver for i.MX CPUs.
2059 config CPU_FREQ_SA1100
2062 config CPU_FREQ_SA1110
2065 config CPU_FREQ_INTEGRATOR
2066 tristate "CPUfreq driver for ARM Integrator CPUs"
2067 depends on ARCH_INTEGRATOR && CPU_FREQ
2070 This enables the CPUfreq driver for ARM Integrator CPUs.
2072 For details, take a look at <file:Documentation/cpu-freq>.
2078 depends on CPU_FREQ && ARCH_PXA && PXA25x
2080 select CPU_FREQ_TABLE
2081 select CPU_FREQ_DEFAULT_GOV_USERSPACE
2086 Internal configuration node for common cpufreq on Samsung SoC
2088 config CPU_FREQ_S3C24XX
2089 bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2090 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
2093 This enables the CPUfreq driver for the Samsung S3C24XX family
2096 For details, take a look at <file:Documentation/cpu-freq>.
2100 config CPU_FREQ_S3C24XX_PLL
2101 bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2102 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
2104 Compile in support for changing the PLL frequency from the
2105 S3C24XX series CPUfreq driver. The PLL takes time to settle
2106 after a frequency change, so by default it is not enabled.
2108 This also means that the PLL tables for the selected CPU(s) will
2109 be built which may increase the size of the kernel image.
2111 config CPU_FREQ_S3C24XX_DEBUG
2112 bool "Debug CPUfreq Samsung driver core"
2113 depends on CPU_FREQ_S3C24XX
2115 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
2117 config CPU_FREQ_S3C24XX_IODEBUG
2118 bool "Debug CPUfreq Samsung driver IO timing"
2119 depends on CPU_FREQ_S3C24XX
2121 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
2123 config CPU_FREQ_S3C24XX_DEBUGFS
2124 bool "Export debugfs for CPUFreq"
2125 depends on CPU_FREQ_S3C24XX && DEBUG_FS
2127 Export status information via debugfs.
2131 source "drivers/cpuidle/Kconfig"
2135 menu "Floating point emulation"
2137 comment "At least one emulation must be selected"
2140 bool "NWFPE math emulation"
2141 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2143 Say Y to include the NWFPE floating point emulator in the kernel.
2144 This is necessary to run most binaries. Linux does not currently
2145 support floating point hardware so you need to say Y here even if
2146 your machine has an FPA or floating point co-processor podule.
2148 You may say N here if you are going to load the Acorn FPEmulator
2149 early in the bootup.
2152 bool "Support extended precision"
2153 depends on FPE_NWFPE
2155 Say Y to include 80-bit support in the kernel floating-point
2156 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2157 Note that gcc does not generate 80-bit operations by default,
2158 so in most cases this option only enlarges the size of the
2159 floating point emulator without any good reason.
2161 You almost surely want to say N here.
2164 bool "FastFPE math emulation (EXPERIMENTAL)"
2165 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
2167 Say Y here to include the FAST floating point emulator in the kernel.
2168 This is an experimental much faster emulator which now also has full
2169 precision for the mantissa. It does not support any exceptions.
2170 It is very simple, and approximately 3-6 times faster than NWFPE.
2172 It should be sufficient for most programs. It may be not suitable
2173 for scientific calculations, but you have to check this for yourself.
2174 If you do not feel you need a faster FP emulation you should better
2178 bool "VFP-format floating point maths"
2179 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2181 Say Y to include VFP support code in the kernel. This is needed
2182 if your hardware includes a VFP unit.
2184 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2185 release notes and additional status information.
2187 Say N if your target does not have VFP hardware.
2195 bool "Advanced SIMD (NEON) Extension support"
2196 depends on VFPv3 && CPU_V7
2198 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2203 menu "Userspace binary formats"
2205 source "fs/Kconfig.binfmt"
2208 tristate "RISC OS personality"
2211 Say Y here to include the kernel code necessary if you want to run
2212 Acorn RISC OS/Arthur binaries under Linux. This code is still very
2213 experimental; if this sounds frightening, say N and sleep in peace.
2214 You can also say M here to compile this support as a module (which
2215 will be called arthur).
2219 menu "Power management options"
2221 source "kernel/power/Kconfig"
2223 config ARCH_SUSPEND_POSSIBLE
2224 depends on !ARCH_S5PC100
2225 depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2226 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
2229 config ARM_CPU_SUSPEND
2234 source "net/Kconfig"
2236 source "drivers/Kconfig"
2240 source "arch/arm/Kconfig.debug"
2242 source "security/Kconfig"
2244 source "crypto/Kconfig"
2246 source "lib/Kconfig"