5 select HAVE_DMA_API_DEBUG
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
33 The ARM series is a line of low-power-consumption RISC chip designs
34 licensed by ARM Ltd and targeted at embedded applications and
35 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
36 manufactured, but legacy ARM-based PC hardware remains popular in
37 Europe. There is an ARM Linux project with a web page at
38 <http://www.arm.linux.org.uk/>.
40 config ARM_HAS_SG_CHAIN
49 config SYS_SUPPORTS_APM_EMULATION
52 config HAVE_SCHED_CLOCK
58 config ARCH_USES_GETTIMEOFFSET
62 config GENERIC_CLOCKEVENTS
65 config GENERIC_CLOCKEVENTS_BROADCAST
67 depends on GENERIC_CLOCKEVENTS
76 select GENERIC_ALLOCATOR
87 The Extended Industry Standard Architecture (EISA) bus was
88 developed as an open alternative to the IBM MicroChannel bus.
90 The EISA bus provided some of the features of the IBM MicroChannel
91 bus while maintaining backward compatibility with cards made for
92 the older ISA bus. The EISA bus saw limited use between 1988 and
93 1995 when it was made obsolete by the PCI bus.
95 Say Y here if you are building a kernel for an EISA-based machine.
105 MicroChannel Architecture is found in some IBM PS/2 machines and
106 laptops. It is a bus system similar to PCI or ISA. See
107 <file:Documentation/mca.txt> (and especially the web page given
108 there) before attempting to build an MCA bus kernel.
110 config STACKTRACE_SUPPORT
114 config HAVE_LATENCYTOP_SUPPORT
119 config LOCKDEP_SUPPORT
123 config TRACE_IRQFLAGS_SUPPORT
127 config HARDIRQS_SW_RESEND
131 config GENERIC_IRQ_PROBE
135 config GENERIC_LOCKBREAK
138 depends on SMP && PREEMPT
140 config RWSEM_GENERIC_SPINLOCK
144 config RWSEM_XCHGADD_ALGORITHM
147 config ARCH_HAS_ILOG2_U32
150 config ARCH_HAS_ILOG2_U64
153 config ARCH_HAS_CPUFREQ
156 Internal node to signify that the ARCH has CPUFREQ support
157 and that the relevant menu configurations are displayed for
160 config ARCH_HAS_CPU_IDLE_WAIT
163 config GENERIC_HWEIGHT
167 config GENERIC_CALIBRATE_DELAY
171 config ARCH_MAY_HAVE_PC_FDC
177 config NEED_DMA_MAP_STATE
180 config GENERIC_ISA_DMA
191 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
192 default DRAM_BASE if REMAP_VECTORS_TO_RAM
195 The base address of exception vectors.
197 config ARM_PATCH_PHYS_VIRT
198 bool "Patch physical to virtual translations at runtime"
199 depends on !XIP_KERNEL && MMU
200 depends on !ARCH_REALVIEW || !SPARSEMEM
202 Patch phys-to-virt and virt-to-phys translation functions at
203 boot and module load time according to the position of the
204 kernel in system memory.
206 This can only be used with non-XIP MMU kernels where the base
207 of physical memory is at a 16MB boundary, or theoretically 64K
208 for the MSM machine class.
210 config ARM_PATCH_PHYS_VIRT_16BIT
212 depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
214 This option extends the physical to virtual translation patching
215 to allow physical memory down to a theoretical minimum of 64K
218 source "init/Kconfig"
220 source "kernel/Kconfig.freezer"
225 bool "MMU-based Paged Memory Management Support"
228 Select if you want MMU-based virtualised addressing space
229 support by paged memory management. If unsure, say 'Y'.
232 # The "ARM system type" choice list is ordered alphabetically by option
233 # text. Please add new entries in the option alphabetic order.
236 prompt "ARM system type"
237 default ARCH_VERSATILE
239 config ARCH_INTEGRATOR
240 bool "ARM Ltd. Integrator family"
242 select ARCH_HAS_CPUFREQ
244 select HAVE_MACH_CLKDEV
246 select GENERIC_CLOCKEVENTS
247 select PLAT_VERSATILE
248 select PLAT_VERSATILE_FPGA_IRQ
250 Support for ARM's Integrator platform.
253 bool "ARM Ltd. RealView family"
256 select HAVE_MACH_CLKDEV
258 select GENERIC_CLOCKEVENTS
259 select ARCH_WANT_OPTIONAL_GPIOLIB
260 select PLAT_VERSATILE
261 select PLAT_VERSATILE_CLCD
262 select ARM_TIMER_SP804
263 select GPIO_PL061 if GPIOLIB
265 This enables support for ARM Ltd RealView boards.
267 config ARCH_VERSATILE
268 bool "ARM Ltd. Versatile 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 PLAT_VERSATILE_FPGA_IRQ
279 select ARM_TIMER_SP804
281 This enables support for ARM Ltd Versatile board.
284 bool "ARM Ltd. Versatile Express family"
285 select ARCH_WANT_OPTIONAL_GPIOLIB
287 select ARM_TIMER_SP804
289 select HAVE_MACH_CLKDEV
290 select GENERIC_CLOCKEVENTS
292 select HAVE_PATA_PLATFORM
294 select PLAT_VERSATILE
295 select PLAT_VERSATILE_CLCD
297 This enables support for the ARM Ltd Versatile Express boards.
301 select ARCH_REQUIRE_GPIOLIB
304 select ARM_PATCH_PHYS_VIRT if MMU
306 This enables support for systems based on the Atmel AT91RM9200,
307 AT91SAM9 and AT91CAP9 processors.
310 bool "Broadcom BCMRING"
314 select ARM_TIMER_SP804
316 select GENERIC_CLOCKEVENTS
317 select ARCH_WANT_OPTIONAL_GPIOLIB
319 Support for Broadcom's BCMRing platform.
322 bool "Cirrus Logic CLPS711x/EP721x-based"
324 select ARCH_USES_GETTIMEOFFSET
326 Support for Cirrus Logic 711x/721x based boards.
329 bool "Cavium Networks CNS3XXX family"
331 select GENERIC_CLOCKEVENTS
333 select MIGHT_HAVE_PCI
334 select PCI_DOMAINS if PCI
336 Support for Cavium Networks CNS3XXX platform.
339 bool "Cortina Systems Gemini"
341 select ARCH_REQUIRE_GPIOLIB
342 select ARCH_USES_GETTIMEOFFSET
344 Support for the Cortina Systems Gemini family SoCs
347 bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
351 select GENERIC_CLOCKEVENTS
353 select GENERIC_IRQ_CHIP
357 Support for CSR SiRFSoC ARM Cortex A9 Platform
364 select ARCH_USES_GETTIMEOFFSET
366 This is an evaluation board for the StrongARM processor available
367 from Digital. It has limited hardware on-board, including an
368 Ethernet interface, two PCMCIA sockets, two serial ports and a
377 select ARCH_REQUIRE_GPIOLIB
378 select ARCH_HAS_HOLES_MEMORYMODEL
379 select ARCH_USES_GETTIMEOFFSET
381 This enables support for the Cirrus EP93xx series of CPUs.
383 config ARCH_FOOTBRIDGE
387 select GENERIC_CLOCKEVENTS
389 Support for systems based on the DC21285 companion chip
390 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
393 bool "Freescale MXC/iMX-based"
394 select GENERIC_CLOCKEVENTS
395 select ARCH_REQUIRE_GPIOLIB
398 select GENERIC_IRQ_CHIP
399 select HAVE_SCHED_CLOCK
401 Support for Freescale MXC/iMX-based family of processors
404 bool "Freescale MXS-based"
405 select GENERIC_CLOCKEVENTS
406 select ARCH_REQUIRE_GPIOLIB
410 Support for Freescale MXS-based family of processors
413 bool "Hilscher NetX based"
417 select GENERIC_CLOCKEVENTS
419 This enables support for systems based on the Hilscher NetX Soc
422 bool "Hynix HMS720x-based"
425 select ARCH_USES_GETTIMEOFFSET
427 This enables support for systems based on the Hynix HMS720x
435 select ARCH_SUPPORTS_MSI
438 Support for Intel's IOP13XX (XScale) family of processors.
446 select ARCH_REQUIRE_GPIOLIB
448 Support for Intel's 80219 and IOP32X (XScale) family of
457 select ARCH_REQUIRE_GPIOLIB
459 Support for Intel's IOP33X (XScale) family of processors.
466 select ARCH_USES_GETTIMEOFFSET
468 Support for Intel's IXP23xx (XScale) family of processors.
471 bool "IXP2400/2800-based"
475 select ARCH_USES_GETTIMEOFFSET
477 Support for Intel's IXP2400/2800 (XScale) family of processors.
485 select GENERIC_CLOCKEVENTS
486 select HAVE_SCHED_CLOCK
487 select MIGHT_HAVE_PCI
488 select DMABOUNCE if PCI
490 Support for Intel's IXP4XX (XScale) family of processors.
496 select ARCH_REQUIRE_GPIOLIB
497 select GENERIC_CLOCKEVENTS
500 Support for the Marvell Dove SoC 88AP510
503 bool "Marvell Kirkwood"
506 select ARCH_REQUIRE_GPIOLIB
507 select GENERIC_CLOCKEVENTS
510 Support for the following Marvell Kirkwood series SoCs:
511 88F6180, 88F6192 and 88F6281.
517 select ARCH_REQUIRE_GPIOLIB
520 select USB_ARCH_HAS_OHCI
523 select GENERIC_CLOCKEVENTS
525 Support for the NXP LPC32XX family of processors
528 bool "Marvell MV78xx0"
531 select ARCH_REQUIRE_GPIOLIB
532 select GENERIC_CLOCKEVENTS
535 Support for the following Marvell MV78xx0 series SoCs:
543 select ARCH_REQUIRE_GPIOLIB
544 select GENERIC_CLOCKEVENTS
547 Support for the following Marvell Orion 5x series SoCs:
548 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
549 Orion-2 (5281), Orion-1-90 (6183).
552 bool "Marvell PXA168/910/MMP2"
554 select ARCH_REQUIRE_GPIOLIB
556 select GENERIC_CLOCKEVENTS
557 select HAVE_SCHED_CLOCK
562 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
565 bool "Micrel/Kendin KS8695"
567 select ARCH_REQUIRE_GPIOLIB
568 select ARCH_USES_GETTIMEOFFSET
570 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
571 System-on-Chip devices.
574 bool "Nuvoton W90X900 CPU"
576 select ARCH_REQUIRE_GPIOLIB
579 select GENERIC_CLOCKEVENTS
581 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
582 At present, the w90x900 has been renamed nuc900, regarding
583 the ARM series product line, you can login the following
584 link address to know more.
586 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
587 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
590 bool "Nuvoton NUC93X CPU"
594 Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
595 low-power and high performance MPEG-4/JPEG multimedia controller chip.
602 select GENERIC_CLOCKEVENTS
605 select HAVE_SCHED_CLOCK
606 select ARCH_HAS_CPUFREQ
608 This enables support for NVIDIA Tegra based systems (Tegra APX,
609 Tegra 6xx and Tegra 2 series).
611 config ARCH_PICOXCELL
612 bool "Picochip picoXcell"
613 select ARCH_REQUIRE_GPIOLIB
614 select ARM_PATCH_PHYS_VIRT
618 select GENERIC_CLOCKEVENTS
620 select HAVE_SCHED_CLOCK
625 This enables support for systems based on the Picochip picoXcell
626 family of Femtocell devices. The picoxcell support requires device tree
630 bool "Philips Nexperia PNX4008 Mobile"
633 select ARCH_USES_GETTIMEOFFSET
635 This enables support for Philips PNX4008 mobile platform.
638 bool "PXA2xx/PXA3xx-based"
641 select ARCH_HAS_CPUFREQ
644 select ARCH_REQUIRE_GPIOLIB
645 select GENERIC_CLOCKEVENTS
646 select HAVE_SCHED_CLOCK
651 select MULTI_IRQ_HANDLER
653 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
658 select GENERIC_CLOCKEVENTS
659 select ARCH_REQUIRE_GPIOLIB
662 Support for Qualcomm MSM/QSD based systems. This runs on the
663 apps processor of the MSM/QSD and depends on a shared memory
664 interface to the modem processor which runs the baseband
665 stack and controls some vital subsystems
666 (clock and power control, etc).
669 bool "Renesas SH-Mobile / R-Mobile"
672 select HAVE_MACH_CLKDEV
673 select GENERIC_CLOCKEVENTS
676 select MULTI_IRQ_HANDLER
677 select PM_GENERIC_DOMAINS if PM
679 Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
686 select ARCH_MAY_HAVE_PC_FDC
687 select HAVE_PATA_PLATFORM
690 select ARCH_SPARSEMEM_ENABLE
691 select ARCH_USES_GETTIMEOFFSET
693 On the Acorn Risc-PC, Linux can support the internal IDE disk and
694 CD-ROM interface, serial and parallel port, and the floppy drive.
701 select ARCH_SPARSEMEM_ENABLE
703 select ARCH_HAS_CPUFREQ
705 select GENERIC_CLOCKEVENTS
707 select HAVE_SCHED_CLOCK
709 select ARCH_REQUIRE_GPIOLIB
711 Support for StrongARM 11x0 based boards.
714 bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
716 select ARCH_HAS_CPUFREQ
719 select ARCH_USES_GETTIMEOFFSET
720 select HAVE_S3C2410_I2C if I2C
722 Samsung S3C2410X CPU based systems, such as the Simtec Electronics
723 BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
724 the Samsung SMDK2410 development board (and derivatives).
726 Note, the S3C2416 and the S3C2450 are so close that they even share
727 the same SoC ID code. This means that there is no separate machine
728 directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
731 bool "Samsung S3C64XX"
738 select ARCH_USES_GETTIMEOFFSET
739 select ARCH_HAS_CPUFREQ
740 select ARCH_REQUIRE_GPIOLIB
741 select SAMSUNG_CLKSRC
742 select SAMSUNG_IRQ_VIC_TIMER
743 select SAMSUNG_IRQ_UART
744 select S3C_GPIO_TRACK
745 select S3C_GPIO_PULL_UPDOWN
746 select S3C_GPIO_CFG_S3C24XX
747 select S3C_GPIO_CFG_S3C64XX
749 select USB_ARCH_HAS_OHCI
750 select SAMSUNG_GPIOLIB_4BIT
751 select HAVE_S3C2410_I2C if I2C
752 select HAVE_S3C2410_WATCHDOG if WATCHDOG
754 Samsung S3C64XX series based systems
757 bool "Samsung S5P6440 S5P6450"
763 select HAVE_S3C2410_WATCHDOG if WATCHDOG
764 select GENERIC_CLOCKEVENTS
765 select HAVE_SCHED_CLOCK
766 select HAVE_S3C2410_I2C if I2C
767 select HAVE_S3C_RTC if RTC_CLASS
769 Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
773 bool "Samsung S5PC100"
778 select ARM_L1_CACHE_SHIFT_6
779 select ARCH_USES_GETTIMEOFFSET
780 select HAVE_S3C2410_I2C if I2C
781 select HAVE_S3C_RTC if RTC_CLASS
782 select HAVE_S3C2410_WATCHDOG if WATCHDOG
784 Samsung S5PC100 series based systems
787 bool "Samsung S5PV210/S5PC110"
789 select ARCH_SPARSEMEM_ENABLE
790 select ARCH_HAS_HOLES_MEMORYMODEL
795 select ARM_L1_CACHE_SHIFT_6
796 select ARCH_HAS_CPUFREQ
797 select GENERIC_CLOCKEVENTS
798 select HAVE_SCHED_CLOCK
799 select HAVE_S3C2410_I2C if I2C
800 select HAVE_S3C_RTC if RTC_CLASS
801 select HAVE_S3C2410_WATCHDOG if WATCHDOG
803 Samsung S5PV210/S5PC110 series based systems
806 bool "Samsung EXYNOS4"
808 select ARCH_SPARSEMEM_ENABLE
809 select ARCH_HAS_HOLES_MEMORYMODEL
813 select ARCH_HAS_CPUFREQ
814 select GENERIC_CLOCKEVENTS
815 select HAVE_S3C_RTC if RTC_CLASS
816 select HAVE_S3C2410_I2C if I2C
817 select HAVE_S3C2410_WATCHDOG if WATCHDOG
819 Samsung EXYNOS4 series based systems
828 select ARCH_USES_GETTIMEOFFSET
830 Support for the StrongARM based Digital DNARD machine, also known
831 as "Shark" (<http://www.shark-linux.de/shark.html>).
834 bool "Telechips TCC ARM926-based systems"
839 select GENERIC_CLOCKEVENTS
841 Support for Telechips TCC ARM926-based systems.
844 bool "ST-Ericsson U300 Series"
848 select HAVE_SCHED_CLOCK
852 select GENERIC_CLOCKEVENTS
854 select HAVE_MACH_CLKDEV
857 Support for ST-Ericsson U300 series mobile platforms.
860 bool "ST-Ericsson U8500 Series"
863 select GENERIC_CLOCKEVENTS
865 select ARCH_REQUIRE_GPIOLIB
866 select ARCH_HAS_CPUFREQ
868 Support for ST-Ericsson's Ux500 architecture
871 bool "STMicroelectronics Nomadik"
876 select GENERIC_CLOCKEVENTS
877 select ARCH_REQUIRE_GPIOLIB
879 Support for the Nomadik platform by ST-Ericsson
883 select GENERIC_CLOCKEVENTS
884 select ARCH_REQUIRE_GPIOLIB
888 select GENERIC_ALLOCATOR
889 select GENERIC_IRQ_CHIP
890 select ARCH_HAS_HOLES_MEMORYMODEL
892 Support for TI's DaVinci platform.
897 select ARCH_REQUIRE_GPIOLIB
898 select ARCH_HAS_CPUFREQ
900 select GENERIC_CLOCKEVENTS
901 select HAVE_SCHED_CLOCK
902 select ARCH_HAS_HOLES_MEMORYMODEL
904 Support for TI's OMAP platform (OMAP1/2/3/4).
909 select ARCH_REQUIRE_GPIOLIB
912 select GENERIC_CLOCKEVENTS
915 Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
918 bool "VIA/WonderMedia 85xx"
921 select ARCH_HAS_CPUFREQ
922 select GENERIC_CLOCKEVENTS
923 select ARCH_REQUIRE_GPIOLIB
926 Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
929 bool "Xilinx Zynq ARM Cortex A9 Platform"
932 select GENERIC_CLOCKEVENTS
939 Support for Xilinx Zynq ARM Cortex A9 Platform
943 # This is sorted alphabetically by mach-* pathname. However, plat-*
944 # Kconfigs may be included either alphabetically (according to the
945 # plat- suffix) or along side the corresponding mach-* source.
947 source "arch/arm/mach-at91/Kconfig"
949 source "arch/arm/mach-bcmring/Kconfig"
951 source "arch/arm/mach-clps711x/Kconfig"
953 source "arch/arm/mach-cns3xxx/Kconfig"
955 source "arch/arm/mach-davinci/Kconfig"
957 source "arch/arm/mach-dove/Kconfig"
959 source "arch/arm/mach-ep93xx/Kconfig"
961 source "arch/arm/mach-footbridge/Kconfig"
963 source "arch/arm/mach-gemini/Kconfig"
965 source "arch/arm/mach-h720x/Kconfig"
967 source "arch/arm/mach-integrator/Kconfig"
969 source "arch/arm/mach-iop32x/Kconfig"
971 source "arch/arm/mach-iop33x/Kconfig"
973 source "arch/arm/mach-iop13xx/Kconfig"
975 source "arch/arm/mach-ixp4xx/Kconfig"
977 source "arch/arm/mach-ixp2000/Kconfig"
979 source "arch/arm/mach-ixp23xx/Kconfig"
981 source "arch/arm/mach-kirkwood/Kconfig"
983 source "arch/arm/mach-ks8695/Kconfig"
985 source "arch/arm/mach-lpc32xx/Kconfig"
987 source "arch/arm/mach-msm/Kconfig"
989 source "arch/arm/mach-mv78xx0/Kconfig"
991 source "arch/arm/plat-mxc/Kconfig"
993 source "arch/arm/mach-mxs/Kconfig"
995 source "arch/arm/mach-netx/Kconfig"
997 source "arch/arm/mach-nomadik/Kconfig"
998 source "arch/arm/plat-nomadik/Kconfig"
1000 source "arch/arm/mach-nuc93x/Kconfig"
1002 source "arch/arm/plat-omap/Kconfig"
1004 source "arch/arm/mach-omap1/Kconfig"
1006 source "arch/arm/mach-omap2/Kconfig"
1008 source "arch/arm/mach-orion5x/Kconfig"
1010 source "arch/arm/mach-pxa/Kconfig"
1011 source "arch/arm/plat-pxa/Kconfig"
1013 source "arch/arm/mach-mmp/Kconfig"
1015 source "arch/arm/mach-realview/Kconfig"
1017 source "arch/arm/mach-sa1100/Kconfig"
1019 source "arch/arm/plat-samsung/Kconfig"
1020 source "arch/arm/plat-s3c24xx/Kconfig"
1021 source "arch/arm/plat-s5p/Kconfig"
1023 source "arch/arm/plat-spear/Kconfig"
1025 source "arch/arm/plat-tcc/Kconfig"
1028 source "arch/arm/mach-s3c2410/Kconfig"
1029 source "arch/arm/mach-s3c2412/Kconfig"
1030 source "arch/arm/mach-s3c2416/Kconfig"
1031 source "arch/arm/mach-s3c2440/Kconfig"
1032 source "arch/arm/mach-s3c2443/Kconfig"
1036 source "arch/arm/mach-s3c64xx/Kconfig"
1039 source "arch/arm/mach-s5p64x0/Kconfig"
1041 source "arch/arm/mach-s5pc100/Kconfig"
1043 source "arch/arm/mach-s5pv210/Kconfig"
1045 source "arch/arm/mach-exynos4/Kconfig"
1047 source "arch/arm/mach-shmobile/Kconfig"
1049 source "arch/arm/mach-tegra/Kconfig"
1051 source "arch/arm/mach-u300/Kconfig"
1053 source "arch/arm/mach-ux500/Kconfig"
1055 source "arch/arm/mach-versatile/Kconfig"
1057 source "arch/arm/mach-vexpress/Kconfig"
1058 source "arch/arm/plat-versatile/Kconfig"
1060 source "arch/arm/mach-vt8500/Kconfig"
1062 source "arch/arm/mach-w90x900/Kconfig"
1064 # Definitions to make life easier
1070 select GENERIC_CLOCKEVENTS
1071 select HAVE_SCHED_CLOCK
1076 select GENERIC_IRQ_CHIP
1077 select HAVE_SCHED_CLOCK
1082 config PLAT_VERSATILE
1085 config ARM_TIMER_SP804
1089 source arch/arm/mm/Kconfig
1092 bool "Enable iWMMXt support"
1093 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1094 default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
1096 Enable support for iWMMXt context switching at run time if
1097 running on a CPU that supports it.
1099 # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
1102 depends on CPU_XSCALE && !XSCALE_PMU_TIMER
1106 depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
1107 (!ARCH_OMAP3 || OMAP3_EMU)
1111 config MULTI_IRQ_HANDLER
1114 Allow each machine to specify it's own IRQ handler at run time.
1117 source "arch/arm/Kconfig-nommu"
1120 config ARM_ERRATA_411920
1121 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1122 depends on CPU_V6 || CPU_V6K
1124 Invalidation of the Instruction Cache operation can
1125 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1126 It does not affect the MPCore. This option enables the ARM Ltd.
1127 recommended workaround.
1129 config ARM_ERRATA_430973
1130 bool "ARM errata: Stale prediction on replaced interworking branch"
1133 This option enables the workaround for the 430973 Cortex-A8
1134 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1135 interworking branch is replaced with another code sequence at the
1136 same virtual address, whether due to self-modifying code or virtual
1137 to physical address re-mapping, Cortex-A8 does not recover from the
1138 stale interworking branch prediction. This results in Cortex-A8
1139 executing the new code sequence in the incorrect ARM or Thumb state.
1140 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1141 and also flushes the branch target cache at every context switch.
1142 Note that setting specific bits in the ACTLR register may not be
1143 available in non-secure mode.
1145 config ARM_ERRATA_458693
1146 bool "ARM errata: Processor deadlock when a false hazard is created"
1149 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1150 erratum. For very specific sequences of memory operations, it is
1151 possible for a hazard condition intended for a cache line to instead
1152 be incorrectly associated with a different cache line. This false
1153 hazard might then cause a processor deadlock. The workaround enables
1154 the L1 caching of the NEON accesses and disables the PLD instruction
1155 in the ACTLR register. Note that setting specific bits in the ACTLR
1156 register may not be available in non-secure mode.
1158 config ARM_ERRATA_460075
1159 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1162 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1163 erratum. Any asynchronous access to the L2 cache may encounter a
1164 situation in which recent store transactions to the L2 cache are lost
1165 and overwritten with stale memory contents from external memory. The
1166 workaround disables the write-allocate mode for the L2 cache via the
1167 ACTLR register. Note that setting specific bits in the ACTLR register
1168 may not be available in non-secure mode.
1170 config ARM_ERRATA_742230
1171 bool "ARM errata: DMB operation may be faulty"
1172 depends on CPU_V7 && SMP
1174 This option enables the workaround for the 742230 Cortex-A9
1175 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1176 between two write operations may not ensure the correct visibility
1177 ordering of the two writes. This workaround sets a specific bit in
1178 the diagnostic register of the Cortex-A9 which causes the DMB
1179 instruction to behave as a DSB, ensuring the correct behaviour of
1182 config ARM_ERRATA_742231
1183 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1184 depends on CPU_V7 && SMP
1186 This option enables the workaround for the 742231 Cortex-A9
1187 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1188 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1189 accessing some data located in the same cache line, may get corrupted
1190 data due to bad handling of the address hazard when the line gets
1191 replaced from one of the CPUs at the same time as another CPU is
1192 accessing it. This workaround sets specific bits in the diagnostic
1193 register of the Cortex-A9 which reduces the linefill issuing
1194 capabilities of the processor.
1196 config PL310_ERRATA_588369
1197 bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
1198 depends on CACHE_L2X0
1200 The PL310 L2 cache controller implements three types of Clean &
1201 Invalidate maintenance operations: by Physical Address
1202 (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1203 They are architecturally defined to behave as the execution of a
1204 clean operation followed immediately by an invalidate operation,
1205 both performing to the same memory location. This functionality
1206 is not correctly implemented in PL310 as clean lines are not
1207 invalidated as a result of these operations.
1209 config ARM_ERRATA_720789
1210 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1211 depends on CPU_V7 && SMP
1213 This option enables the workaround for the 720789 Cortex-A9 (prior to
1214 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1215 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1216 As a consequence of this erratum, some TLB entries which should be
1217 invalidated are not, resulting in an incoherency in the system page
1218 tables. The workaround changes the TLB flushing routines to invalidate
1219 entries regardless of the ASID.
1221 config PL310_ERRATA_727915
1222 bool "Background Clean & Invalidate by Way operation can cause data corruption"
1223 depends on CACHE_L2X0
1225 PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1226 operation (offset 0x7FC). This operation runs in background so that
1227 PL310 can handle normal accesses while it is in progress. Under very
1228 rare circumstances, due to this erratum, write data can be lost when
1229 PL310 treats a cacheable write transaction during a Clean &
1230 Invalidate by Way operation.
1232 config ARM_ERRATA_743622
1233 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1236 This option enables the workaround for the 743622 Cortex-A9
1237 (r2p0..r2p2) erratum. Under very rare conditions, a faulty
1238 optimisation in the Cortex-A9 Store Buffer may lead to data
1239 corruption. This workaround sets a specific bit in the diagnostic
1240 register of the Cortex-A9 which disables the Store Buffer
1241 optimisation, preventing the defect from occurring. This has no
1242 visible impact on the overall performance or power consumption of the
1245 config ARM_ERRATA_751472
1246 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1247 depends on CPU_V7 && SMP
1249 This option enables the workaround for the 751472 Cortex-A9 (prior
1250 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1251 completion of a following broadcasted operation if the second
1252 operation is received by a CPU before the ICIALLUIS has completed,
1253 potentially leading to corrupted entries in the cache or TLB.
1255 config ARM_ERRATA_753970
1256 bool "ARM errata: cache sync operation may be faulty"
1257 depends on CACHE_PL310
1259 This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1261 Under some condition the effect of cache sync operation on
1262 the store buffer still remains when the operation completes.
1263 This means that the store buffer is always asked to drain and
1264 this prevents it from merging any further writes. The workaround
1265 is to replace the normal offset of cache sync operation (0x730)
1266 by another offset targeting an unmapped PL310 register 0x740.
1267 This has the same effect as the cache sync operation: store buffer
1268 drain and waiting for all buffers empty.
1270 config ARM_ERRATA_754322
1271 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1274 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1275 r3p*) erratum. A speculative memory access may cause a page table walk
1276 which starts prior to an ASID switch but completes afterwards. This
1277 can populate the micro-TLB with a stale entry which may be hit with
1278 the new ASID. This workaround places two dsb instructions in the mm
1279 switching code so that no page table walks can cross the ASID switch.
1281 config ARM_ERRATA_754327
1282 bool "ARM errata: no automatic Store Buffer drain"
1283 depends on CPU_V7 && SMP
1285 This option enables the workaround for the 754327 Cortex-A9 (prior to
1286 r2p0) erratum. The Store Buffer does not have any automatic draining
1287 mechanism and therefore a livelock may occur if an external agent
1288 continuously polls a memory location waiting to observe an update.
1289 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1290 written polling loops from denying visibility of updates to memory.
1294 source "arch/arm/common/Kconfig"
1304 Find out whether you have ISA slots on your motherboard. ISA is the
1305 name of a bus system, i.e. the way the CPU talks to the other stuff
1306 inside your box. Other bus systems are PCI, EISA, MicroChannel
1307 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1308 newer boards don't support it. If you have ISA, say Y, otherwise N.
1310 # Select ISA DMA controller support
1315 # Select ISA DMA interface
1320 bool "PCI support" if MIGHT_HAVE_PCI
1322 Find out whether you have a PCI motherboard. PCI is the name of a
1323 bus system, i.e. the way the CPU talks to the other stuff inside
1324 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1325 VESA. If you have PCI, say Y, otherwise N.
1331 config PCI_NANOENGINE
1332 bool "BSE nanoEngine PCI support"
1333 depends on SA1100_NANOENGINE
1335 Enable PCI on the BSE nanoEngine board.
1340 # Select the host bridge type
1341 config PCI_HOST_VIA82C505
1343 depends on PCI && ARCH_SHARK
1346 config PCI_HOST_ITE8152
1348 depends on PCI && MACH_ARMCORE
1352 source "drivers/pci/Kconfig"
1354 source "drivers/pcmcia/Kconfig"
1358 menu "Kernel Features"
1360 source "kernel/time/Kconfig"
1363 bool "Symmetric Multi-Processing"
1364 depends on CPU_V6K || CPU_V7
1365 depends on GENERIC_CLOCKEVENTS
1366 depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
1367 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
1368 ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
1369 ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
1370 select USE_GENERIC_SMP_HELPERS
1371 select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
1373 This enables support for systems with more than one CPU. If you have
1374 a system with only one CPU, like most personal computers, say N. If
1375 you have a system with more than one CPU, say Y.
1377 If you say N here, the kernel will run on single and multiprocessor
1378 machines, but will use only one CPU of a multiprocessor machine. If
1379 you say Y here, the kernel will run on many, but not all, single
1380 processor machines. On a single processor machine, the kernel will
1381 run faster if you say N here.
1383 See also <file:Documentation/i386/IO-APIC.txt>,
1384 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1385 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1387 If you don't know what to do here, say N.
1390 bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1391 depends on EXPERIMENTAL
1392 depends on SMP && !XIP_KERNEL
1395 SMP kernels contain instructions which fail on non-SMP processors.
1396 Enabling this option allows the kernel to modify itself to make
1397 these instructions safe. Disabling it allows about 1K of space
1400 If you don't know what to do here, say Y.
1405 This option enables support for the ARM system coherency unit
1412 This options enables support for the ARM timer and watchdog unit
1415 prompt "Memory split"
1418 Select the desired split between kernel and user memory.
1420 If you are not absolutely sure what you are doing, leave this
1424 bool "3G/1G user/kernel split"
1426 bool "2G/2G user/kernel split"
1428 bool "1G/3G user/kernel split"
1433 default 0x40000000 if VMSPLIT_1G
1434 default 0x80000000 if VMSPLIT_2G
1438 int "Maximum number of CPUs (2-32)"
1444 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
1445 depends on SMP && HOTPLUG && EXPERIMENTAL
1447 Say Y here to experiment with turning CPUs off and on. CPUs
1448 can be controlled through /sys/devices/system/cpu.
1451 bool "Use local timer interrupts"
1454 select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
1456 Enable support for local timers on SMP platforms, rather then the
1457 legacy IPI broadcast method. Local timers allows the system
1458 accounting to be spread across the timer interval, preventing a
1459 "thundering herd" at every timer tick.
1461 source kernel/Kconfig.preempt
1465 default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
1466 ARCH_S5PV210 || ARCH_EXYNOS4
1467 default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
1468 default AT91_TIMER_HZ if ARCH_AT91
1469 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1472 config THUMB2_KERNEL
1473 bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
1474 depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
1476 select ARM_ASM_UNIFIED
1478 By enabling this option, the kernel will be compiled in
1479 Thumb-2 mode. A compiler/assembler that understand the unified
1480 ARM-Thumb syntax is needed.
1484 config THUMB2_AVOID_R_ARM_THM_JUMP11
1485 bool "Work around buggy Thumb-2 short branch relocations in gas"
1486 depends on THUMB2_KERNEL && MODULES
1489 Various binutils versions can resolve Thumb-2 branches to
1490 locally-defined, preemptible global symbols as short-range "b.n"
1491 branch instructions.
1493 This is a problem, because there's no guarantee the final
1494 destination of the symbol, or any candidate locations for a
1495 trampoline, are within range of the branch. For this reason, the
1496 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1497 relocation in modules at all, and it makes little sense to add
1500 The symptom is that the kernel fails with an "unsupported
1501 relocation" error when loading some modules.
1503 Until fixed tools are available, passing
1504 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1505 code which hits this problem, at the cost of a bit of extra runtime
1506 stack usage in some cases.
1508 The problem is described in more detail at:
1509 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1511 Only Thumb-2 kernels are affected.
1513 Unless you are sure your tools don't have this problem, say Y.
1515 config ARM_ASM_UNIFIED
1519 bool "Use the ARM EABI to compile the kernel"
1521 This option allows for the kernel to be compiled using the latest
1522 ARM ABI (aka EABI). This is only useful if you are using a user
1523 space environment that is also compiled with EABI.
1525 Since there are major incompatibilities between the legacy ABI and
1526 EABI, especially with regard to structure member alignment, this
1527 option also changes the kernel syscall calling convention to
1528 disambiguate both ABIs and allow for backward compatibility support
1529 (selected with CONFIG_OABI_COMPAT).
1531 To use this you need GCC version 4.0.0 or later.
1534 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1535 depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
1538 This option preserves the old syscall interface along with the
1539 new (ARM EABI) one. It also provides a compatibility layer to
1540 intercept syscalls that have structure arguments which layout
1541 in memory differs between the legacy ABI and the new ARM EABI
1542 (only for non "thumb" binaries). This option adds a tiny
1543 overhead to all syscalls and produces a slightly larger kernel.
1544 If you know you'll be using only pure EABI user space then you
1545 can say N here. If this option is not selected and you attempt
1546 to execute a legacy ABI binary then the result will be
1547 UNPREDICTABLE (in fact it can be predicted that it won't work
1548 at all). If in doubt say Y.
1550 config ARCH_HAS_HOLES_MEMORYMODEL
1553 config ARCH_SPARSEMEM_ENABLE
1556 config ARCH_SPARSEMEM_DEFAULT
1557 def_bool ARCH_SPARSEMEM_ENABLE
1559 config ARCH_SELECT_MEMORY_MODEL
1560 def_bool ARCH_SPARSEMEM_ENABLE
1562 config HAVE_ARCH_PFN_VALID
1563 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1566 bool "High Memory Support"
1569 The address space of ARM processors is only 4 Gigabytes large
1570 and it has to accommodate user address space, kernel address
1571 space as well as some memory mapped IO. That means that, if you
1572 have a large amount of physical memory and/or IO, not all of the
1573 memory can be "permanently mapped" by the kernel. The physical
1574 memory that is not permanently mapped is called "high memory".
1576 Depending on the selected kernel/user memory split, minimum
1577 vmalloc space and actual amount of RAM, you may not need this
1578 option which should result in a slightly faster kernel.
1583 bool "Allocate 2nd-level pagetables from highmem"
1586 config HW_PERF_EVENTS
1587 bool "Enable hardware performance counter support for perf events"
1588 depends on PERF_EVENTS && CPU_HAS_PMU
1591 Enable hardware performance counter support for perf events. If
1592 disabled, perf events will use software events only.
1596 config FORCE_MAX_ZONEORDER
1597 int "Maximum zone order" if ARCH_SHMOBILE
1598 range 11 64 if ARCH_SHMOBILE
1599 default "9" if SA1111
1602 The kernel memory allocator divides physically contiguous memory
1603 blocks into "zones", where each zone is a power of two number of
1604 pages. This option selects the largest power of two that the kernel
1605 keeps in the memory allocator. If you need to allocate very large
1606 blocks of physically contiguous memory, then you may need to
1607 increase this value.
1609 This config option is actually maximum order plus one. For example,
1610 a value of 11 means that the largest free memory block is 2^10 pages.
1613 bool "Timer and CPU usage LEDs"
1614 depends on ARCH_CDB89712 || ARCH_EBSA110 || \
1615 ARCH_EBSA285 || ARCH_INTEGRATOR || \
1616 ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
1617 ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
1618 ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
1619 ARCH_AT91 || ARCH_DAVINCI || \
1620 ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
1622 If you say Y here, the LEDs on your machine will be used
1623 to provide useful information about your current system status.
1625 If you are compiling a kernel for a NetWinder or EBSA-285, you will
1626 be able to select which LEDs are active using the options below. If
1627 you are compiling a kernel for the EBSA-110 or the LART however, the
1628 red LED will simply flash regularly to indicate that the system is
1629 still functional. It is safe to say Y here if you have a CATS
1630 system, but the driver will do nothing.
1633 bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
1634 OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1635 || MACH_OMAP_PERSEUS2
1637 depends on !GENERIC_CLOCKEVENTS
1638 default y if ARCH_EBSA110
1640 If you say Y here, one of the system LEDs (the green one on the
1641 NetWinder, the amber one on the EBSA285, or the red one on the LART)
1642 will flash regularly to indicate that the system is still
1643 operational. This is mainly useful to kernel hackers who are
1644 debugging unstable kernels.
1646 The LART uses the same LED for both Timer LED and CPU usage LED
1647 functions. You may choose to use both, but the Timer LED function
1648 will overrule the CPU usage LED.
1651 bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
1653 || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
1654 || MACH_OMAP_PERSEUS2
1657 If you say Y here, the red LED will be used to give a good real
1658 time indication of CPU usage, by lighting whenever the idle task
1659 is not currently executing.
1661 The LART uses the same LED for both Timer LED and CPU usage LED
1662 functions. You may choose to use both, but the Timer LED function
1663 will overrule the CPU usage LED.
1665 config ALIGNMENT_TRAP
1667 depends on CPU_CP15_MMU
1668 default y if !ARCH_EBSA110
1669 select HAVE_PROC_CPU if PROC_FS
1671 ARM processors cannot fetch/store information which is not
1672 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1673 address divisible by 4. On 32-bit ARM processors, these non-aligned
1674 fetch/store instructions will be emulated in software if you say
1675 here, which has a severe performance impact. This is necessary for
1676 correct operation of some network protocols. With an IP-only
1677 configuration it is safe to say N, otherwise say Y.
1679 config UACCESS_WITH_MEMCPY
1680 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
1681 depends on MMU && EXPERIMENTAL
1682 default y if CPU_FEROCEON
1684 Implement faster copy_to_user and clear_user methods for CPU
1685 cores where a 8-word STM instruction give significantly higher
1686 memory write throughput than a sequence of individual 32bit stores.
1688 A possible side effect is a slight increase in scheduling latency
1689 between threads sharing the same address space if they invoke
1690 such copy operations with large buffers.
1692 However, if the CPU data cache is using a write-allocate mode,
1693 this option is unlikely to provide any performance gain.
1697 prompt "Enable seccomp to safely compute untrusted bytecode"
1699 This kernel feature is useful for number crunching applications
1700 that may need to compute untrusted bytecode during their
1701 execution. By using pipes or other transports made available to
1702 the process as file descriptors supporting the read/write
1703 syscalls, it's possible to isolate those applications in
1704 their own address space using seccomp. Once seccomp is
1705 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1706 and the task is only allowed to execute a few safe syscalls
1707 defined by each seccomp mode.
1709 config CC_STACKPROTECTOR
1710 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1711 depends on EXPERIMENTAL
1713 This option turns on the -fstack-protector GCC feature. This
1714 feature puts, at the beginning of functions, a canary value on
1715 the stack just before the return address, and validates
1716 the value just before actually returning. Stack based buffer
1717 overflows (that need to overwrite this return address) now also
1718 overwrite the canary, which gets detected and the attack is then
1719 neutralized via a kernel panic.
1720 This feature requires gcc version 4.2 or above.
1722 config DEPRECATED_PARAM_STRUCT
1723 bool "Provide old way to pass kernel parameters"
1725 This was deprecated in 2001 and announced to live on for 5 years.
1726 Some old boot loaders still use this way.
1733 bool "Flattened Device Tree support"
1735 select OF_EARLY_FLATTREE
1738 Include support for flattened device tree machine descriptions.
1740 # Compressed boot loader in ROM. Yes, we really want to ask about
1741 # TEXT and BSS so we preserve their values in the config files.
1742 config ZBOOT_ROM_TEXT
1743 hex "Compressed ROM boot loader base address"
1746 The physical address at which the ROM-able zImage is to be
1747 placed in the target. Platforms which normally make use of
1748 ROM-able zImage formats normally set this to a suitable
1749 value in their defconfig file.
1751 If ZBOOT_ROM is not enabled, this has no effect.
1753 config ZBOOT_ROM_BSS
1754 hex "Compressed ROM boot loader BSS address"
1757 The base address of an area of read/write memory in the target
1758 for the ROM-able zImage which must be available while the
1759 decompressor is running. It must be large enough to hold the
1760 entire decompressed kernel plus an additional 128 KiB.
1761 Platforms which normally make use of ROM-able zImage formats
1762 normally set this to a suitable value in their defconfig file.
1764 If ZBOOT_ROM is not enabled, this has no effect.
1767 bool "Compressed boot loader in ROM/flash"
1768 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1770 Say Y here if you intend to execute your compressed kernel image
1771 (zImage) directly from ROM or flash. If unsure, say N.
1774 prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1775 depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
1776 default ZBOOT_ROM_NONE
1778 Include experimental SD/MMC loading code in the ROM-able zImage.
1779 With this enabled it is possible to write the the ROM-able zImage
1780 kernel image to an MMC or SD card and boot the kernel straight
1781 from the reset vector. At reset the processor Mask ROM will load
1782 the first part of the the ROM-able zImage which in turn loads the
1783 rest the kernel image to RAM.
1785 config ZBOOT_ROM_NONE
1786 bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1788 Do not load image from SD or MMC
1790 config ZBOOT_ROM_MMCIF
1791 bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1793 Load image from MMCIF hardware block.
1795 config ZBOOT_ROM_SH_MOBILE_SDHI
1796 bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1798 Load image from SDHI hardware block
1803 string "Default kernel command string"
1806 On some architectures (EBSA110 and CATS), there is currently no way
1807 for the boot loader to pass arguments to the kernel. For these
1808 architectures, you should supply some command-line options at build
1809 time by entering them here. As a minimum, you should specify the
1810 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1813 prompt "Kernel command line type" if CMDLINE != ""
1814 default CMDLINE_FROM_BOOTLOADER
1816 config CMDLINE_FROM_BOOTLOADER
1817 bool "Use bootloader kernel arguments if available"
1819 Uses the command-line options passed by the boot loader. If
1820 the boot loader doesn't provide any, the default kernel command
1821 string provided in CMDLINE will be used.
1823 config CMDLINE_EXTEND
1824 bool "Extend bootloader kernel arguments"
1826 The command-line arguments provided by the boot loader will be
1827 appended to the default kernel command string.
1829 config CMDLINE_FORCE
1830 bool "Always use the default kernel command string"
1832 Always use the default kernel command string, even if the boot
1833 loader passes other arguments to the kernel.
1834 This is useful if you cannot or don't want to change the
1835 command-line options your boot loader passes to the kernel.
1839 bool "Kernel Execute-In-Place from ROM"
1840 depends on !ZBOOT_ROM
1842 Execute-In-Place allows the kernel to run from non-volatile storage
1843 directly addressable by the CPU, such as NOR flash. This saves RAM
1844 space since the text section of the kernel is not loaded from flash
1845 to RAM. Read-write sections, such as the data section and stack,
1846 are still copied to RAM. The XIP kernel is not compressed since
1847 it has to run directly from flash, so it will take more space to
1848 store it. The flash address used to link the kernel object files,
1849 and for storing it, is configuration dependent. Therefore, if you
1850 say Y here, you must know the proper physical address where to
1851 store the kernel image depending on your own flash memory usage.
1853 Also note that the make target becomes "make xipImage" rather than
1854 "make zImage" or "make Image". The final kernel binary to put in
1855 ROM memory will be arch/arm/boot/xipImage.
1859 config XIP_PHYS_ADDR
1860 hex "XIP Kernel Physical Location"
1861 depends on XIP_KERNEL
1862 default "0x00080000"
1864 This is the physical address in your flash memory the kernel will
1865 be linked for and stored to. This address is dependent on your
1869 bool "Kexec system call (EXPERIMENTAL)"
1870 depends on EXPERIMENTAL
1872 kexec is a system call that implements the ability to shutdown your
1873 current kernel, and to start another kernel. It is like a reboot
1874 but it is independent of the system firmware. And like a reboot
1875 you can start any kernel with it, not just Linux.
1877 It is an ongoing process to be certain the hardware in a machine
1878 is properly shutdown, so do not be surprised if this code does not
1879 initially work for you. It may help to enable device hotplugging
1883 bool "Export atags in procfs"
1887 Should the atags used to boot the kernel be exported in an "atags"
1888 file in procfs. Useful with kexec.
1891 bool "Build kdump crash kernel (EXPERIMENTAL)"
1892 depends on EXPERIMENTAL
1894 Generate crash dump after being started by kexec. This should
1895 be normally only set in special crash dump kernels which are
1896 loaded in the main kernel with kexec-tools into a specially
1897 reserved region and then later executed after a crash by
1898 kdump/kexec. The crash dump kernel must be compiled to a
1899 memory address not used by the main kernel
1901 For more details see Documentation/kdump/kdump.txt
1903 config AUTO_ZRELADDR
1904 bool "Auto calculation of the decompressed kernel image address"
1905 depends on !ZBOOT_ROM && !ARCH_U300
1907 ZRELADDR is the physical address where the decompressed kernel
1908 image will be placed. If AUTO_ZRELADDR is selected, the address
1909 will be determined at run-time by masking the current IP with
1910 0xf8000000. This assumes the zImage being placed in the first 128MB
1911 from start of memory.
1915 menu "CPU Power Management"
1919 source "drivers/cpufreq/Kconfig"
1922 tristate "CPUfreq driver for i.MX CPUs"
1923 depends on ARCH_MXC && CPU_FREQ
1925 This enables the CPUfreq driver for i.MX CPUs.
1927 config CPU_FREQ_SA1100
1930 config CPU_FREQ_SA1110
1933 config CPU_FREQ_INTEGRATOR
1934 tristate "CPUfreq driver for ARM Integrator CPUs"
1935 depends on ARCH_INTEGRATOR && CPU_FREQ
1938 This enables the CPUfreq driver for ARM Integrator CPUs.
1940 For details, take a look at <file:Documentation/cpu-freq>.
1946 depends on CPU_FREQ && ARCH_PXA && PXA25x
1948 select CPU_FREQ_DEFAULT_GOV_USERSPACE
1953 Internal configuration node for common cpufreq on Samsung SoC
1955 config CPU_FREQ_S3C24XX
1956 bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
1957 depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
1960 This enables the CPUfreq driver for the Samsung S3C24XX family
1963 For details, take a look at <file:Documentation/cpu-freq>.
1967 config CPU_FREQ_S3C24XX_PLL
1968 bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
1969 depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
1971 Compile in support for changing the PLL frequency from the
1972 S3C24XX series CPUfreq driver. The PLL takes time to settle
1973 after a frequency change, so by default it is not enabled.
1975 This also means that the PLL tables for the selected CPU(s) will
1976 be built which may increase the size of the kernel image.
1978 config CPU_FREQ_S3C24XX_DEBUG
1979 bool "Debug CPUfreq Samsung driver core"
1980 depends on CPU_FREQ_S3C24XX
1982 Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
1984 config CPU_FREQ_S3C24XX_IODEBUG
1985 bool "Debug CPUfreq Samsung driver IO timing"
1986 depends on CPU_FREQ_S3C24XX
1988 Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
1990 config CPU_FREQ_S3C24XX_DEBUGFS
1991 bool "Export debugfs for CPUFreq"
1992 depends on CPU_FREQ_S3C24XX && DEBUG_FS
1994 Export status information via debugfs.
1998 source "drivers/cpuidle/Kconfig"
2002 menu "Floating point emulation"
2004 comment "At least one emulation must be selected"
2007 bool "NWFPE math emulation"
2008 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2010 Say Y to include the NWFPE floating point emulator in the kernel.
2011 This is necessary to run most binaries. Linux does not currently
2012 support floating point hardware so you need to say Y here even if
2013 your machine has an FPA or floating point co-processor podule.
2015 You may say N here if you are going to load the Acorn FPEmulator
2016 early in the bootup.
2019 bool "Support extended precision"
2020 depends on FPE_NWFPE
2022 Say Y to include 80-bit support in the kernel floating-point
2023 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2024 Note that gcc does not generate 80-bit operations by default,
2025 so in most cases this option only enlarges the size of the
2026 floating point emulator without any good reason.
2028 You almost surely want to say N here.
2031 bool "FastFPE math emulation (EXPERIMENTAL)"
2032 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
2034 Say Y here to include the FAST floating point emulator in the kernel.
2035 This is an experimental much faster emulator which now also has full
2036 precision for the mantissa. It does not support any exceptions.
2037 It is very simple, and approximately 3-6 times faster than NWFPE.
2039 It should be sufficient for most programs. It may be not suitable
2040 for scientific calculations, but you have to check this for yourself.
2041 If you do not feel you need a faster FP emulation you should better
2045 bool "VFP-format floating point maths"
2046 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2048 Say Y to include VFP support code in the kernel. This is needed
2049 if your hardware includes a VFP unit.
2051 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2052 release notes and additional status information.
2054 Say N if your target does not have VFP hardware.
2062 bool "Advanced SIMD (NEON) Extension support"
2063 depends on VFPv3 && CPU_V7
2065 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2070 menu "Userspace binary formats"
2072 source "fs/Kconfig.binfmt"
2075 tristate "RISC OS personality"
2078 Say Y here to include the kernel code necessary if you want to run
2079 Acorn RISC OS/Arthur binaries under Linux. This code is still very
2080 experimental; if this sounds frightening, say N and sleep in peace.
2081 You can also say M here to compile this support as a module (which
2082 will be called arthur).
2086 menu "Power management options"
2088 source "kernel/power/Kconfig"
2090 config ARCH_SUSPEND_POSSIBLE
2091 depends on !ARCH_S5P64X0 && !ARCH_S5PC100
2092 depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2093 CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
2098 source "net/Kconfig"
2100 source "drivers/Kconfig"
2104 source "arch/arm/Kconfig.debug"
2106 source "security/Kconfig"
2108 source "crypto/Kconfig"
2110 source "lib/Kconfig"