11da177e4SLinus Torvaldsconfig ARM 21da177e4SLinus Torvalds bool 31da177e4SLinus Torvalds default y 4b1b3f49cSRussell King select ARCH_BINFMT_ELF_RANDOMIZE_PIE 57463449bSCatalin Marinas select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 63d06770eSMark Rutland select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 7171b3f0dSRussell King select ARCH_HAVE_CUSTOM_GPIO_H 8d7018848SMark Salter select ARCH_MIGHT_HAVE_PC_PARPORT 94badad35SPeter Zijlstra select ARCH_SUPPORTS_ATOMIC_RMW 10017f161aSKim Phillips select ARCH_USE_BUILTIN_BSWAP 110cbad9c9SWill Deacon select ARCH_USE_CMPXCHG_LOCKREF 12b1b3f49cSRussell King select ARCH_WANT_IPC_PARSE_VERSION 13ee951c63SStephen Boyd select BUILDTIME_EXTABLE_SORT if MMU 14171b3f0dSRussell King select CLONE_BACKWARDS 15b1b3f49cSRussell King select CPU_PM if (SUSPEND || CPU_IDLE) 16dce5c9e3SWill Deacon select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS 174477ca45SUwe Kleine-König select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI) 18b1b3f49cSRussell King select GENERIC_CLOCKEVENTS_BROADCAST if SMP 19171b3f0dSRussell King select GENERIC_IDLE_POLL_SETUP 20b1b3f49cSRussell King select GENERIC_IRQ_PROBE 21b1b3f49cSRussell King select GENERIC_IRQ_SHOW 22b1b3f49cSRussell King select GENERIC_PCI_IOMAP 2338ff87f7SStephen Boyd select GENERIC_SCHED_CLOCK 24b1b3f49cSRussell King select GENERIC_SMP_IDLE_THREAD 25b1b3f49cSRussell King select GENERIC_STRNCPY_FROM_USER 26b1b3f49cSRussell King select GENERIC_STRNLEN_USER 27b1b3f49cSRussell King select HARDIRQS_SW_RESEND 287a017721SAKASHI Takahiro select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) 2909f05d85SRabin Vincent select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL 305cbad0ebSJason Wessel select HAVE_ARCH_KGDB 3191702175SKees Cook select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) 320693bf68SWade Farnsworth select HAVE_ARCH_TRACEHOOK 33b1b3f49cSRussell King select HAVE_BPF_JIT 3451aaf81fSRussell King select HAVE_CC_STACKPROTECTOR 35171b3f0dSRussell King select HAVE_CONTEXT_TRACKING 36b1b3f49cSRussell King select HAVE_C_RECORDMCOUNT 37b1b3f49cSRussell King select HAVE_DEBUG_KMEMLEAK 38b1b3f49cSRussell King select HAVE_DMA_API_DEBUG 39b1b3f49cSRussell King select HAVE_DMA_ATTRS 40b1b3f49cSRussell King select HAVE_DMA_CONTIGUOUS if MMU 41b1b3f49cSRussell King select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) 42dce5c9e3SWill Deacon select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU 43b1b3f49cSRussell King select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) 44b1b3f49cSRussell King select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL) 45b1b3f49cSRussell King select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) 46b1b3f49cSRussell King select HAVE_GENERIC_DMA_COHERENT 47b1b3f49cSRussell King select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7)) 48b1b3f49cSRussell King select HAVE_IDE if PCI || ISA || PCMCIA 4987c46b6cSRussell King select HAVE_IRQ_TIME_ACCOUNTING 50b1b3f49cSRussell King select HAVE_KERNEL_GZIP 51f9b493acSKyungsik Lee select HAVE_KERNEL_LZ4 52b1b3f49cSRussell King select HAVE_KERNEL_LZMA 53b1b3f49cSRussell King select HAVE_KERNEL_LZO 54b1b3f49cSRussell King select HAVE_KERNEL_XZ 55856bc356SJon Medhurst select HAVE_KPROBES if !XIP_KERNEL 569edddaa2SAnanth N Mavinakayanahalli select HAVE_KRETPROBES if (HAVE_KPROBES) 57b1b3f49cSRussell King select HAVE_MEMBLOCK 58171b3f0dSRussell King select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND 59b1b3f49cSRussell King select HAVE_OPROFILE if (HAVE_PERF_EVENTS) 607ada189fSJamie Iles select HAVE_PERF_EVENTS 6149863894SWill Deacon select HAVE_PERF_REGS 6249863894SWill Deacon select HAVE_PERF_USER_STACK_DUMP 63e513f8bfSWill Deacon select HAVE_REGS_AND_STACK_ACCESS_API 64b1b3f49cSRussell King select HAVE_SYSCALL_TRACEPOINTS 65af1839ebSCatalin Marinas select HAVE_UID16 6631c1fc81SKevin Hilman select HAVE_VIRT_CPU_ACCOUNTING_GEN 67da0ec6f7SThomas Gleixner select IRQ_FORCED_THREADING 68171b3f0dSRussell King select MODULES_USE_ELF_REL 6984f452b1SSantosh Shilimkar select NO_BOOTMEM 70171b3f0dSRussell King select OLD_SIGACTION 71171b3f0dSRussell King select OLD_SIGSUSPEND3 72b1b3f49cSRussell King select PERF_USE_VMALLOC 73b1b3f49cSRussell King select RTC_LIB 74b1b3f49cSRussell King select SYS_SUPPORTS_APM_EMULATION 75171b3f0dSRussell King # Above selects are sorted alphabetically; please add new ones 76171b3f0dSRussell King # according to that. Thanks. 771da177e4SLinus Torvalds help 781da177e4SLinus Torvalds The ARM series is a line of low-power-consumption RISC chip designs 79f6c8965aSMartin Michlmayr licensed by ARM Ltd and targeted at embedded applications and 801da177e4SLinus Torvalds handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 811da177e4SLinus Torvalds manufactured, but legacy ARM-based PC hardware remains popular in 821da177e4SLinus Torvalds Europe. There is an ARM Linux project with a web page at 831da177e4SLinus Torvalds <http://www.arm.linux.org.uk/>. 841da177e4SLinus Torvalds 8574facffeSRussell Kingconfig ARM_HAS_SG_CHAIN 86308c09f1SLaura Abbott select ARCH_HAS_SG_CHAIN 8774facffeSRussell King bool 8874facffeSRussell King 894ce63fcdSMarek Szyprowskiconfig NEED_SG_DMA_LENGTH 904ce63fcdSMarek Szyprowski bool 914ce63fcdSMarek Szyprowski 924ce63fcdSMarek Szyprowskiconfig ARM_DMA_USE_IOMMU 934ce63fcdSMarek Szyprowski bool 94b1b3f49cSRussell King select ARM_HAS_SG_CHAIN 95b1b3f49cSRussell King select NEED_SG_DMA_LENGTH 964ce63fcdSMarek Szyprowski 9760460abfSSeung-Woo Kimif ARM_DMA_USE_IOMMU 9860460abfSSeung-Woo Kim 9960460abfSSeung-Woo Kimconfig ARM_DMA_IOMMU_ALIGNMENT 10060460abfSSeung-Woo Kim int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers" 10160460abfSSeung-Woo Kim range 4 9 10260460abfSSeung-Woo Kim default 8 10360460abfSSeung-Woo Kim help 10460460abfSSeung-Woo Kim DMA mapping framework by default aligns all buffers to the smallest 10560460abfSSeung-Woo Kim PAGE_SIZE order which is greater than or equal to the requested buffer 10660460abfSSeung-Woo Kim size. This works well for buffers up to a few hundreds kilobytes, but 10760460abfSSeung-Woo Kim for larger buffers it just a waste of address space. Drivers which has 10860460abfSSeung-Woo Kim relatively small addressing window (like 64Mib) might run out of 10960460abfSSeung-Woo Kim virtual space with just a few allocations. 11060460abfSSeung-Woo Kim 11160460abfSSeung-Woo Kim With this parameter you can specify the maximum PAGE_SIZE order for 11260460abfSSeung-Woo Kim DMA IOMMU buffers. Larger buffers will be aligned only to this 11360460abfSSeung-Woo Kim specified order. The order is expressed as a power of two multiplied 11460460abfSSeung-Woo Kim by the PAGE_SIZE. 11560460abfSSeung-Woo Kim 11660460abfSSeung-Woo Kimendif 11760460abfSSeung-Woo Kim 1180b05da72SHans Ulli Krollconfig MIGHT_HAVE_PCI 1190b05da72SHans Ulli Kroll bool 1200b05da72SHans Ulli Kroll 12175e7153aSRalf Baechleconfig SYS_SUPPORTS_APM_EMULATION 12275e7153aSRalf Baechle bool 12375e7153aSRalf Baechle 124bc581770SLinus Walleijconfig HAVE_TCM 125bc581770SLinus Walleij bool 126bc581770SLinus Walleij select GENERIC_ALLOCATOR 127bc581770SLinus Walleij 128e119bfffSRussell Kingconfig HAVE_PROC_CPU 129e119bfffSRussell King bool 130e119bfffSRussell King 131ce816fa8SUwe Kleine-Königconfig NO_IOPORT_MAP 1325ea81769SAl Viro bool 1335ea81769SAl Viro 1341da177e4SLinus Torvaldsconfig EISA 1351da177e4SLinus Torvalds bool 1361da177e4SLinus Torvalds ---help--- 1371da177e4SLinus Torvalds The Extended Industry Standard Architecture (EISA) bus was 1381da177e4SLinus Torvalds developed as an open alternative to the IBM MicroChannel bus. 1391da177e4SLinus Torvalds 1401da177e4SLinus Torvalds The EISA bus provided some of the features of the IBM MicroChannel 1411da177e4SLinus Torvalds bus while maintaining backward compatibility with cards made for 1421da177e4SLinus Torvalds the older ISA bus. The EISA bus saw limited use between 1988 and 1431da177e4SLinus Torvalds 1995 when it was made obsolete by the PCI bus. 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds Say Y here if you are building a kernel for an EISA-based machine. 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds Otherwise, say N. 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvaldsconfig SBUS 1501da177e4SLinus Torvalds bool 1511da177e4SLinus Torvalds 152f16fb1ecSRussell Kingconfig STACKTRACE_SUPPORT 153f16fb1ecSRussell King bool 154f16fb1ecSRussell King default y 155f16fb1ecSRussell King 156f76e9154SNicolas Pitreconfig HAVE_LATENCYTOP_SUPPORT 157f76e9154SNicolas Pitre bool 158f76e9154SNicolas Pitre depends on !SMP 159f76e9154SNicolas Pitre default y 160f76e9154SNicolas Pitre 161f16fb1ecSRussell Kingconfig LOCKDEP_SUPPORT 162f16fb1ecSRussell King bool 163f16fb1ecSRussell King default y 164f16fb1ecSRussell King 1657ad1bcb2SRussell Kingconfig TRACE_IRQFLAGS_SUPPORT 1667ad1bcb2SRussell King bool 1677ad1bcb2SRussell King default y 1687ad1bcb2SRussell King 1691da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM 1701da177e4SLinus Torvalds bool 1718a87411bSWill Deacon default y 1721da177e4SLinus Torvalds 173f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U32 174f0d1b0b3SDavid Howells bool 175f0d1b0b3SDavid Howells 176f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U64 177f0d1b0b3SDavid Howells bool 178f0d1b0b3SDavid Howells 1794a1b5733SEduardo Valentinconfig ARCH_HAS_BANDGAP 1804a1b5733SEduardo Valentin bool 1814a1b5733SEduardo Valentin 182b89c3b16SAkinobu Mitaconfig GENERIC_HWEIGHT 183b89c3b16SAkinobu Mita bool 184b89c3b16SAkinobu Mita default y 185b89c3b16SAkinobu Mita 1861da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY 1871da177e4SLinus Torvalds bool 1881da177e4SLinus Torvalds default y 1891da177e4SLinus Torvalds 190a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC 191a08b6b79Sviro@ZenIV.linux.org.uk bool 192a08b6b79Sviro@ZenIV.linux.org.uk 1935ac6da66SChristoph Lameterconfig ZONE_DMA 1945ac6da66SChristoph Lameter bool 1955ac6da66SChristoph Lameter 196ccd7ab7fSFUJITA Tomonoriconfig NEED_DMA_MAP_STATE 197ccd7ab7fSFUJITA Tomonori def_bool y 198ccd7ab7fSFUJITA Tomonori 199c7edc9e3SDavid A. Longconfig ARCH_SUPPORTS_UPROBES 200c7edc9e3SDavid A. Long def_bool y 201c7edc9e3SDavid A. Long 20258af4a24SRob Herringconfig ARCH_HAS_DMA_SET_COHERENT_MASK 20358af4a24SRob Herring bool 20458af4a24SRob Herring 2051da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA 2061da177e4SLinus Torvalds bool 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvaldsconfig FIQ 2091da177e4SLinus Torvalds bool 2101da177e4SLinus Torvalds 21113a5045dSRob Herringconfig NEED_RET_TO_USER 21213a5045dSRob Herring bool 21313a5045dSRob Herring 214034d2f5aSAl Viroconfig ARCH_MTD_XIP 215034d2f5aSAl Viro bool 216034d2f5aSAl Viro 217c760fc19SHyok S. Choiconfig VECTORS_BASE 218c760fc19SHyok S. Choi hex 2196afd6faeSHyok S. Choi default 0xffff0000 if MMU || CPU_HIGH_VECTOR 220c760fc19SHyok S. Choi default DRAM_BASE if REMAP_VECTORS_TO_RAM 221c760fc19SHyok S. Choi default 0x00000000 222c760fc19SHyok S. Choi help 22319accfd3SRussell King The base address of exception vectors. This must be two pages 22419accfd3SRussell King in size. 225c760fc19SHyok S. Choi 226dc21af99SRussell Kingconfig ARM_PATCH_PHYS_VIRT 227c1becedcSRussell King bool "Patch physical to virtual translations at runtime" if EMBEDDED 228c1becedcSRussell King default y 229b511d75dSNicolas Pitre depends on !XIP_KERNEL && MMU 230dc21af99SRussell King depends on !ARCH_REALVIEW || !SPARSEMEM 231dc21af99SRussell King help 232111e9a5cSRussell King Patch phys-to-virt and virt-to-phys translation functions at 233111e9a5cSRussell King boot and module load time according to the position of the 234111e9a5cSRussell King kernel in system memory. 235dc21af99SRussell King 236111e9a5cSRussell King This can only be used with non-XIP MMU kernels where the base 237daece596SNicolas Pitre of physical memory is at a 16MB boundary. 238dc21af99SRussell King 239c1becedcSRussell King Only disable this option if you know that you do not require 240c1becedcSRussell King this feature (eg, building a kernel for a single machine) and 241c1becedcSRussell King you need to shrink the kernel to the minimal size. 242c1becedcSRussell King 24301464226SRob Herringconfig NEED_MACH_GPIO_H 24401464226SRob Herring bool 24501464226SRob Herring help 24601464226SRob Herring Select this when mach/gpio.h is required to provide special 24701464226SRob Herring definitions for this platform. The need for mach/gpio.h should 24801464226SRob Herring be avoided when possible. 24901464226SRob Herring 250c334bc15SRob Herringconfig NEED_MACH_IO_H 251c334bc15SRob Herring bool 252c334bc15SRob Herring help 253c334bc15SRob Herring Select this when mach/io.h is required to provide special 254c334bc15SRob Herring definitions for this platform. The need for mach/io.h should 255c334bc15SRob Herring be avoided when possible. 256c334bc15SRob Herring 2570cdc8b92SNicolas Pitreconfig NEED_MACH_MEMORY_H 2581b9f95f8SNicolas Pitre bool 259111e9a5cSRussell King help 2600cdc8b92SNicolas Pitre Select this when mach/memory.h is required to provide special 2610cdc8b92SNicolas Pitre definitions for this platform. The need for mach/memory.h should 2620cdc8b92SNicolas Pitre be avoided when possible. 2631b9f95f8SNicolas Pitre 2641b9f95f8SNicolas Pitreconfig PHYS_OFFSET 265974c0724SNicolas Pitre hex "Physical address of main memory" if MMU 266c6f54a9bSUwe Kleine-König depends on !ARM_PATCH_PHYS_VIRT 267974c0724SNicolas Pitre default DRAM_BASE if !MMU 268c6f54a9bSUwe Kleine-König default 0x00000000 if ARCH_EBSA110 || \ 269c6f54a9bSUwe Kleine-König EP93XX_SDCE3_SYNC_PHYS_OFFSET || \ 270c6f54a9bSUwe Kleine-König ARCH_FOOTBRIDGE || \ 271c6f54a9bSUwe Kleine-König ARCH_INTEGRATOR || \ 272c6f54a9bSUwe Kleine-König ARCH_IOP13XX || \ 273c6f54a9bSUwe Kleine-König ARCH_KS8695 || \ 274c6f54a9bSUwe Kleine-König (ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET) 275c6f54a9bSUwe Kleine-König default 0x10000000 if ARCH_OMAP1 || ARCH_RPC 276c6f54a9bSUwe Kleine-König default 0x20000000 if ARCH_S5PV210 277c6f54a9bSUwe Kleine-König default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET 278c6f54a9bSUwe Kleine-König default 0xc0000000 if EP93XX_SDCE0_PHYS_OFFSET || ARCH_SA1100 279c6f54a9bSUwe Kleine-König default 0xd0000000 if EP93XX_SDCE1_PHYS_OFFSET 280c6f54a9bSUwe Kleine-König default 0xe0000000 if EP93XX_SDCE2_PHYS_OFFSET 281c6f54a9bSUwe Kleine-König default 0xf0000000 if EP93XX_SDCE3_ASYNC_PHYS_OFFSET 2821b9f95f8SNicolas Pitre help 2831b9f95f8SNicolas Pitre Please provide the physical address corresponding to the 2841b9f95f8SNicolas Pitre location of main memory in your system. 285cada3c08SRussell King 28687e040b6SSimon Glassconfig GENERIC_BUG 28787e040b6SSimon Glass def_bool y 28887e040b6SSimon Glass depends on BUG 28987e040b6SSimon Glass 2901da177e4SLinus Torvaldssource "init/Kconfig" 2911da177e4SLinus Torvalds 292dc52ddc0SMatt Helsleysource "kernel/Kconfig.freezer" 293dc52ddc0SMatt Helsley 2941da177e4SLinus Torvaldsmenu "System Type" 2951da177e4SLinus Torvalds 2963c427975SHyok S. Choiconfig MMU 2973c427975SHyok S. Choi bool "MMU-based Paged Memory Management Support" 2983c427975SHyok S. Choi default y 2993c427975SHyok S. Choi help 3003c427975SHyok S. Choi Select if you want MMU-based virtualised addressing space 3013c427975SHyok S. Choi support by paged memory management. If unsure, say 'Y'. 3023c427975SHyok S. Choi 303ccf50e23SRussell King# 304ccf50e23SRussell King# The "ARM system type" choice list is ordered alphabetically by option 305ccf50e23SRussell King# text. Please add new entries in the option alphabetic order. 306ccf50e23SRussell King# 3071da177e4SLinus Torvaldschoice 3081da177e4SLinus Torvalds prompt "ARM system type" 3091420b22bSArnd Bergmann default ARCH_VERSATILE if !MMU 3101420b22bSArnd Bergmann default ARCH_MULTIPLATFORM if MMU 3111da177e4SLinus Torvalds 312387798b3SRob Herringconfig ARCH_MULTIPLATFORM 313387798b3SRob Herring bool "Allow multiple platforms to be selected" 314b1b3f49cSRussell King depends on MMU 315ddb902ccSRob Herring select ARCH_WANT_OPTIONAL_GPIOLIB 31642dc836dSOlof Johansson select ARM_HAS_SG_CHAIN 317387798b3SRob Herring select ARM_PATCH_PHYS_VIRT 318387798b3SRob Herring select AUTO_ZRELADDR 3196d0add40SRob Herring select CLKSRC_OF 32066314223SDinh Nguyen select COMMON_CLK 321ddb902ccSRob Herring select GENERIC_CLOCKEVENTS 32208d38bebSWill Deacon select MIGHT_HAVE_PCI 323387798b3SRob Herring select MULTI_IRQ_HANDLER 32466314223SDinh Nguyen select SPARSE_IRQ 32566314223SDinh Nguyen select USE_OF 32666314223SDinh Nguyen 3274af6fee1SDeepak Saxenaconfig ARCH_INTEGRATOR 3284af6fee1SDeepak Saxena bool "ARM Ltd. Integrator family" 329b1b3f49cSRussell King select ARM_AMBA 33091942d17SUwe Kleine-König select ARM_PATCH_PHYS_VIRT if MMU 331fe989145Spanchaxari select AUTO_ZRELADDR 332a613163dSLinus Walleij select COMMON_CLK 333f9a6aa43SLinus Walleij select COMMON_CLK_VERSATILE 334b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 3359904f793SLinus Walleij select HAVE_TCM 336c5a0adb5SRussell King select ICST 337b1b3f49cSRussell King select MULTI_IRQ_HANDLER 338b1b3f49cSRussell King select NEED_MACH_MEMORY_H 339f4b8b319SRussell King select PLAT_VERSATILE 340695436e3SLinus Walleij select SPARSE_IRQ 341d7057e1dSLinus Walleij select USE_OF 3422389d501SLinus Walleij select VERSATILE_FPGA_IRQ 3434af6fee1SDeepak Saxena help 3444af6fee1SDeepak Saxena Support for ARM's Integrator platform. 3454af6fee1SDeepak Saxena 3464af6fee1SDeepak Saxenaconfig ARCH_REALVIEW 3474af6fee1SDeepak Saxena bool "ARM Ltd. RealView family" 348b1b3f49cSRussell King select ARCH_WANT_OPTIONAL_GPIOLIB 3494af6fee1SDeepak Saxena select ARM_AMBA 350b1b3f49cSRussell King select ARM_TIMER_SP804 351f9a6aa43SLinus Walleij select COMMON_CLK 352f9a6aa43SLinus Walleij select COMMON_CLK_VERSATILE 353ae30ceacSCatalin Marinas select GENERIC_CLOCKEVENTS 354b1b3f49cSRussell King select GPIO_PL061 if GPIOLIB 355b1b3f49cSRussell King select ICST 356b1b3f49cSRussell King select NEED_MACH_MEMORY_H 357f4b8b319SRussell King select PLAT_VERSATILE 3583cb5ee49SRussell King select PLAT_VERSATILE_CLCD 3594af6fee1SDeepak Saxena help 3604af6fee1SDeepak Saxena This enables support for ARM Ltd RealView boards. 3614af6fee1SDeepak Saxena 3624af6fee1SDeepak Saxenaconfig ARCH_VERSATILE 3634af6fee1SDeepak Saxena bool "ARM Ltd. Versatile family" 364b1b3f49cSRussell King select ARCH_WANT_OPTIONAL_GPIOLIB 3654af6fee1SDeepak Saxena select ARM_AMBA 366b1b3f49cSRussell King select ARM_TIMER_SP804 3674af6fee1SDeepak Saxena select ARM_VIC 3686d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 369b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 370aa3831cfSKyungmin Park select HAVE_MACH_CLKDEV 371c5a0adb5SRussell King select ICST 372f4b8b319SRussell King select PLAT_VERSATILE 3733414ba8cSRussell King select PLAT_VERSATILE_CLCD 374b1b3f49cSRussell King select PLAT_VERSATILE_CLOCK 3752389d501SLinus Walleij select VERSATILE_FPGA_IRQ 3764af6fee1SDeepak Saxena help 3774af6fee1SDeepak Saxena This enables support for ARM Ltd Versatile board. 3784af6fee1SDeepak Saxena 3798fc5ffa0SAndrew Victorconfig ARCH_AT91 3808fc5ffa0SAndrew Victor bool "Atmel AT91" 381f373e8c0SRyan Mallon select ARCH_REQUIRE_GPIOLIB 382bd602995SJean-Christophe PLAGNIOL-VILLARD select CLKDEV_LOOKUP 383e261501dSNicolas Ferre select IRQ_DOMAIN 3841ac02d79SRob Herring select NEED_MACH_IO_H if PCCARD 3856732ae5cSJean-Christophe PLAGNIOL-VILLARD select PINCTRL 3866732ae5cSJean-Christophe PLAGNIOL-VILLARD select PINCTRL_AT91 if USE_OF 3874af6fee1SDeepak Saxena help 388929e994fSNicolas Ferre This enables support for systems based on Atmel 389929e994fSNicolas Ferre AT91RM9200 and AT91SAM9* processors. 3904af6fee1SDeepak Saxena 39193e22567SRussell Kingconfig ARCH_CLPS711X 39293e22567SRussell King bool "Cirrus Logic CLPS711x/EP721x/EP731x-based" 393a3b8d4a5SAlexander Shiyan select ARCH_REQUIRE_GPIOLIB 394ea7d1bc9SAlexander Shiyan select AUTO_ZRELADDR 395c99f72adSAlexander Shiyan select CLKSRC_MMIO 39693e22567SRussell King select COMMON_CLK 39793e22567SRussell King select CPU_ARM720T 3984a8355c4SAlexander Shiyan select GENERIC_CLOCKEVENTS 3996597619fSAlexander Shiyan select MFD_SYSCON 40093e22567SRussell King help 40193e22567SRussell King Support for Cirrus Logic 711x/721x/731x based boards. 40293e22567SRussell King 403788c9700SRussell Kingconfig ARCH_GEMINI 404788c9700SRussell King bool "Cortina Systems Gemini" 405788c9700SRussell King select ARCH_REQUIRE_GPIOLIB 406f3372c01SLinus Walleij select CLKSRC_MMIO 407b1b3f49cSRussell King select CPU_FA526 408f3372c01SLinus Walleij select GENERIC_CLOCKEVENTS 409788c9700SRussell King help 410788c9700SRussell King Support for the Cortina Systems Gemini family SoCs 411788c9700SRussell King 4121da177e4SLinus Torvaldsconfig ARCH_EBSA110 4131da177e4SLinus Torvalds bool "EBSA-110" 414b1b3f49cSRussell King select ARCH_USES_GETTIMEOFFSET 415c750815eSRussell King select CPU_SA110 416f7e68bbfSRussell King select ISA 417c334bc15SRob Herring select NEED_MACH_IO_H 4180cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 419ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 4201da177e4SLinus Torvalds help 4211da177e4SLinus Torvalds This is an evaluation board for the StrongARM processor available 422f6c8965aSMartin Michlmayr from Digital. It has limited hardware on-board, including an 4231da177e4SLinus Torvalds Ethernet interface, two PCMCIA sockets, two serial ports and a 4241da177e4SLinus Torvalds parallel port. 4251da177e4SLinus Torvalds 4266d85e2b0SUwe Kleine-Königconfig ARCH_EFM32 4276d85e2b0SUwe Kleine-König bool "Energy Micro efm32" 4286d85e2b0SUwe Kleine-König depends on !MMU 4296d85e2b0SUwe Kleine-König select ARCH_REQUIRE_GPIOLIB 4306d85e2b0SUwe Kleine-König select ARM_NVIC 43151aaf81fSRussell King select AUTO_ZRELADDR 4326d85e2b0SUwe Kleine-König select CLKSRC_OF 4336d85e2b0SUwe Kleine-König select COMMON_CLK 4346d85e2b0SUwe Kleine-König select CPU_V7M 4356d85e2b0SUwe Kleine-König select GENERIC_CLOCKEVENTS 4366d85e2b0SUwe Kleine-König select NO_DMA 437ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 4386d85e2b0SUwe Kleine-König select SPARSE_IRQ 4396d85e2b0SUwe Kleine-König select USE_OF 4406d85e2b0SUwe Kleine-König help 4416d85e2b0SUwe Kleine-König Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko 4426d85e2b0SUwe Kleine-König processors. 4436d85e2b0SUwe Kleine-König 444e7736d47SLennert Buytenhekconfig ARCH_EP93XX 445e7736d47SLennert Buytenhek bool "EP93xx-based" 446b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 447b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 448b1b3f49cSRussell King select ARCH_USES_GETTIMEOFFSET 449e7736d47SLennert Buytenhek select ARM_AMBA 450e7736d47SLennert Buytenhek select ARM_VIC 4516d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 452b1b3f49cSRussell King select CPU_ARM920T 453e7736d47SLennert Buytenhek help 454e7736d47SLennert Buytenhek This enables support for the Cirrus EP93xx series of CPUs. 455e7736d47SLennert Buytenhek 4561da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE 4571da177e4SLinus Torvalds bool "FootBridge" 458c750815eSRussell King select CPU_SA110 4591da177e4SLinus Torvalds select FOOTBRIDGE 4604e8d7637SRussell King select GENERIC_CLOCKEVENTS 461d0ee9f40SArnd Bergmann select HAVE_IDE 4628ef6e620SRob Herring select NEED_MACH_IO_H if !MMU 4630cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 464f999b8bdSMartin Michlmayr help 465f999b8bdSMartin Michlmayr Support for systems based on the DC21285 companion chip 466f999b8bdSMartin Michlmayr ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 4671da177e4SLinus Torvalds 4684af6fee1SDeepak Saxenaconfig ARCH_NETX 4694af6fee1SDeepak Saxena bool "Hilscher NetX based" 470b1b3f49cSRussell King select ARM_VIC 471234b6cedSRussell King select CLKSRC_MMIO 472c750815eSRussell King select CPU_ARM926T 4732fcfe6b8SUwe Kleine-König select GENERIC_CLOCKEVENTS 474f999b8bdSMartin Michlmayr help 4754af6fee1SDeepak Saxena This enables support for systems based on the Hilscher NetX Soc 4764af6fee1SDeepak Saxena 4773b938be6SRussell Kingconfig ARCH_IOP13XX 4783b938be6SRussell King bool "IOP13xx-based" 4793b938be6SRussell King depends on MMU 480b1b3f49cSRussell King select CPU_XSC3 4810cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 48213a5045dSRob Herring select NEED_RET_TO_USER 483b1b3f49cSRussell King select PCI 484b1b3f49cSRussell King select PLAT_IOP 485b1b3f49cSRussell King select VMSPLIT_1G 48637ebbcffSThomas Gleixner select SPARSE_IRQ 4873b938be6SRussell King help 4883b938be6SRussell King Support for Intel's IOP13XX (XScale) family of processors. 4893b938be6SRussell King 4903f7e5815SLennert Buytenhekconfig ARCH_IOP32X 4913f7e5815SLennert Buytenhek bool "IOP32x-based" 492a4f7e763SRussell King depends on MMU 493b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 494c750815eSRussell King select CPU_XSCALE 495e9004f50SLinus Walleij select GPIO_IOP 49613a5045dSRob Herring select NEED_RET_TO_USER 497f7e68bbfSRussell King select PCI 498b1b3f49cSRussell King select PLAT_IOP 499f999b8bdSMartin Michlmayr help 5003f7e5815SLennert Buytenhek Support for Intel's 80219 and IOP32X (XScale) family of 5013f7e5815SLennert Buytenhek processors. 5023f7e5815SLennert Buytenhek 5033f7e5815SLennert Buytenhekconfig ARCH_IOP33X 5043f7e5815SLennert Buytenhek bool "IOP33x-based" 5053f7e5815SLennert Buytenhek depends on MMU 506b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 507c750815eSRussell King select CPU_XSCALE 508e9004f50SLinus Walleij select GPIO_IOP 50913a5045dSRob Herring select NEED_RET_TO_USER 5103f7e5815SLennert Buytenhek select PCI 511b1b3f49cSRussell King select PLAT_IOP 5123f7e5815SLennert Buytenhek help 5133f7e5815SLennert Buytenhek Support for Intel's IOP33X (XScale) family of processors. 5141da177e4SLinus Torvalds 5153b938be6SRussell Kingconfig ARCH_IXP4XX 5163b938be6SRussell King bool "IXP4xx-based" 517a4f7e763SRussell King depends on MMU 51858af4a24SRob Herring select ARCH_HAS_DMA_SET_COHERENT_MASK 519b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 52051aaf81fSRussell King select ARCH_SUPPORTS_BIG_ENDIAN 521234b6cedSRussell King select CLKSRC_MMIO 522c750815eSRussell King select CPU_XSCALE 523b1b3f49cSRussell King select DMABOUNCE if PCI 5243b938be6SRussell King select GENERIC_CLOCKEVENTS 5250b05da72SHans Ulli Kroll select MIGHT_HAVE_PCI 526c334bc15SRob Herring select NEED_MACH_IO_H 5279296d94dSFlorian Fainelli select USB_EHCI_BIG_ENDIAN_DESC 528171b3f0dSRussell King select USB_EHCI_BIG_ENDIAN_MMIO 529c4713074SLennert Buytenhek help 5303b938be6SRussell King Support for Intel's IXP4XX (XScale) family of processors. 531c4713074SLennert Buytenhek 532edabd38eSSaeed Bisharaconfig ARCH_DOVE 533edabd38eSSaeed Bishara bool "Marvell Dove" 534edabd38eSSaeed Bishara select ARCH_REQUIRE_GPIOLIB 535756b2531SSebastian Hesselbarth select CPU_PJ4 536edabd38eSSaeed Bishara select GENERIC_CLOCKEVENTS 5370f81bd43SRussell King select MIGHT_HAVE_PCI 538171b3f0dSRussell King select MVEBU_MBUS 5399139acd1SSebastian Hesselbarth select PINCTRL 5409139acd1SSebastian Hesselbarth select PINCTRL_DOVE 541abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 542edabd38eSSaeed Bishara help 543edabd38eSSaeed Bishara Support for the Marvell Dove SoC 88AP510 544edabd38eSSaeed Bishara 545651c74c7SSaeed Bisharaconfig ARCH_KIRKWOOD 546651c74c7SSaeed Bishara bool "Marvell Kirkwood" 547a8865655SErik Benada select ARCH_REQUIRE_GPIOLIB 548b1b3f49cSRussell King select CPU_FEROCEON 549651c74c7SSaeed Bishara select GENERIC_CLOCKEVENTS 550171b3f0dSRussell King select MVEBU_MBUS 551b1b3f49cSRussell King select PCI 5521dc831bfSJason Gunthorpe select PCI_QUIRKS 553f9e75922SAndrew Lunn select PINCTRL 554f9e75922SAndrew Lunn select PINCTRL_KIRKWOOD 555abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 556651c74c7SSaeed Bishara help 557651c74c7SSaeed Bishara Support for the following Marvell Kirkwood series SoCs: 558651c74c7SSaeed Bishara 88F6180, 88F6192 and 88F6281. 559651c74c7SSaeed Bishara 560788c9700SRussell Kingconfig ARCH_MV78XX0 561788c9700SRussell King bool "Marvell MV78xx0" 562a8865655SErik Benada select ARCH_REQUIRE_GPIOLIB 563b1b3f49cSRussell King select CPU_FEROCEON 564788c9700SRussell King select GENERIC_CLOCKEVENTS 565171b3f0dSRussell King select MVEBU_MBUS 566b1b3f49cSRussell King select PCI 567abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 568788c9700SRussell King help 569788c9700SRussell King Support for the following Marvell MV78xx0 series SoCs: 570788c9700SRussell King MV781x0, MV782x0. 571788c9700SRussell King 572788c9700SRussell Kingconfig ARCH_ORION5X 573788c9700SRussell King bool "Marvell Orion" 574788c9700SRussell King depends on MMU 575a8865655SErik Benada select ARCH_REQUIRE_GPIOLIB 576b1b3f49cSRussell King select CPU_FEROCEON 577788c9700SRussell King select GENERIC_CLOCKEVENTS 578171b3f0dSRussell King select MVEBU_MBUS 579b1b3f49cSRussell King select PCI 580abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 581788c9700SRussell King help 582788c9700SRussell King Support for the following Marvell Orion 5x series SoCs: 583788c9700SRussell King Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 584788c9700SRussell King Orion-2 (5281), Orion-1-90 (6183). 585788c9700SRussell King 586788c9700SRussell Kingconfig ARCH_MMP 5872f7e8faeSHaojian Zhuang bool "Marvell PXA168/910/MMP2" 588788c9700SRussell King depends on MMU 589788c9700SRussell King select ARCH_REQUIRE_GPIOLIB 5906d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 591b1b3f49cSRussell King select GENERIC_ALLOCATOR 592788c9700SRussell King select GENERIC_CLOCKEVENTS 593157d2644SHaojian Zhuang select GPIO_PXA 594c24b3114SHaojian Zhuang select IRQ_DOMAIN 5950f374561SHaojian Zhuang select MULTI_IRQ_HANDLER 5967c8f86a4SAxel Lin select PINCTRL 597788c9700SRussell King select PLAT_PXA 5980bd86961SHaojian Zhuang select SPARSE_IRQ 599788c9700SRussell King help 6002f7e8faeSHaojian Zhuang Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line. 601788c9700SRussell King 602c53c9cf6SAndrew Victorconfig ARCH_KS8695 603c53c9cf6SAndrew Victor bool "Micrel/Kendin KS8695" 60472880ad8SDaniel Silverstone select ARCH_REQUIRE_GPIOLIB 605c7e783d6SLinus Walleij select CLKSRC_MMIO 606b1b3f49cSRussell King select CPU_ARM922T 607c7e783d6SLinus Walleij select GENERIC_CLOCKEVENTS 608b1b3f49cSRussell King select NEED_MACH_MEMORY_H 609c53c9cf6SAndrew Victor help 610c53c9cf6SAndrew Victor Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 611c53c9cf6SAndrew Victor System-on-Chip devices. 612c53c9cf6SAndrew Victor 613788c9700SRussell Kingconfig ARCH_W90X900 614788c9700SRussell King bool "Nuvoton W90X900 CPU" 615c52d3d68Swanzongshun select ARCH_REQUIRE_GPIOLIB 6166d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 6176fa5d5f7SRussell King select CLKSRC_MMIO 618b1b3f49cSRussell King select CPU_ARM926T 61958b5369eSwanzongshun select GENERIC_CLOCKEVENTS 620777f9bebSLennert Buytenhek help 621a8bc4eadSwanzongshun Support for Nuvoton (Winbond logic dept.) ARM9 processor, 622a8bc4eadSwanzongshun At present, the w90x900 has been renamed nuc900, regarding 623a8bc4eadSwanzongshun the ARM series product line, you can login the following 624a8bc4eadSwanzongshun link address to know more. 625a8bc4eadSwanzongshun 626a8bc4eadSwanzongshun <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/ 627a8bc4eadSwanzongshun ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller> 628585cf175STzachi Perelstein 62993e22567SRussell Kingconfig ARCH_LPC32XX 63093e22567SRussell King bool "NXP LPC32XX" 63193e22567SRussell King select ARCH_REQUIRE_GPIOLIB 63293e22567SRussell King select ARM_AMBA 6334073723aSRussell King select CLKDEV_LOOKUP 634234b6cedSRussell King select CLKSRC_MMIO 63593e22567SRussell King select CPU_ARM926T 63693e22567SRussell King select GENERIC_CLOCKEVENTS 63793e22567SRussell King select HAVE_IDE 63893e22567SRussell King select USE_OF 63993e22567SRussell King help 64093e22567SRussell King Support for the NXP LPC32XX family of processors 64193e22567SRussell King 6421da177e4SLinus Torvaldsconfig ARCH_PXA 6432c8086a5Seric miao bool "PXA2xx/PXA3xx-based" 644a4f7e763SRussell King depends on MMU 645b1b3f49cSRussell King select ARCH_MTD_XIP 646b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 647b1b3f49cSRussell King select ARM_CPU_SUSPEND if PM 648b1b3f49cSRussell King select AUTO_ZRELADDR 6496d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 650234b6cedSRussell King select CLKSRC_MMIO 6516f6caeaaSRobert Jarzmik select CLKSRC_OF 652981d0f39SEric Miao select GENERIC_CLOCKEVENTS 653157d2644SHaojian Zhuang select GPIO_PXA 654b1b3f49cSRussell King select HAVE_IDE 655b1b3f49cSRussell King select MULTI_IRQ_HANDLER 656bd5ce433SEric Miao select PLAT_PXA 6576ac6b817SHaojian Zhuang select SPARSE_IRQ 658f999b8bdSMartin Michlmayr help 6592c8086a5Seric miao Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 6601da177e4SLinus Torvalds 6618fc1b0f8SKumar Galaconfig ARCH_MSM 6628fc1b0f8SKumar Gala bool "Qualcomm MSM (non-multiplatform)" 663923a081cSPavel Machek select ARCH_REQUIRE_GPIOLIB 6648cc7f533SStephen Boyd select COMMON_CLK 665b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 66649cbe786SEric Miao help 6674b53eb4fSDaniel Walker Support for Qualcomm MSM/QSD based systems. This runs on the 6684b53eb4fSDaniel Walker apps processor of the MSM/QSD and depends on a shared memory 6694b53eb4fSDaniel Walker interface to the modem processor which runs the baseband 6704b53eb4fSDaniel Walker stack and controls some vital subsystems 6714b53eb4fSDaniel Walker (clock and power control, etc). 67249cbe786SEric Miao 673bf98c1eaSLaurent Pinchartconfig ARCH_SHMOBILE_LEGACY 6740d9fd616SLaurent Pinchart bool "Renesas ARM SoCs (non-multiplatform)" 675bf98c1eaSLaurent Pinchart select ARCH_SHMOBILE 67691942d17SUwe Kleine-König select ARM_PATCH_PHYS_VIRT if MMU 6775e93c6b4SPaul Mundt select CLKDEV_LOOKUP 678b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 6794c3ffffdSStephen Boyd select HAVE_ARM_SCU if SMP 680a894fcc2SStephen Boyd select HAVE_ARM_TWD if SMP 681aa3831cfSKyungmin Park select HAVE_MACH_CLKDEV 6823b55658aSDave Martin select HAVE_SMP 683ce5ea9f3SDave Martin select MIGHT_HAVE_CACHE_L2X0 68460f1435cSMagnus Damm select MULTI_IRQ_HANDLER 685ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 6862cd3c927SLaurent Pinchart select PINCTRL 687b1b3f49cSRussell King select PM_GENERIC_DOMAINS if PM 688b1b3f49cSRussell King select SPARSE_IRQ 689c793c1b0SMagnus Damm help 6900d9fd616SLaurent Pinchart Support for Renesas ARM SoC platforms using a non-multiplatform 6910d9fd616SLaurent Pinchart kernel. This includes the SH-Mobile, R-Mobile, EMMA-Mobile, R-Car 6920d9fd616SLaurent Pinchart and RZ families. 693c793c1b0SMagnus Damm 6941da177e4SLinus Torvaldsconfig ARCH_RPC 6951da177e4SLinus Torvalds bool "RiscPC" 6961da177e4SLinus Torvalds select ARCH_ACORN 697a08b6b79Sviro@ZenIV.linux.org.uk select ARCH_MAY_HAVE_PC_FDC 69807f841b7SRussell King select ARCH_SPARSEMEM_ENABLE 6995cfc8ee0SJohn Stultz select ARCH_USES_GETTIMEOFFSET 700fa04e209SArnd Bergmann select CPU_SA110 701b1b3f49cSRussell King select FIQ 702d0ee9f40SArnd Bergmann select HAVE_IDE 703b1b3f49cSRussell King select HAVE_PATA_PLATFORM 704b1b3f49cSRussell King select ISA_DMA_API 705c334bc15SRob Herring select NEED_MACH_IO_H 7060cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 707ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 708b4811bacSArnd Bergmann select VIRT_TO_BUS 7091da177e4SLinus Torvalds help 7101da177e4SLinus Torvalds On the Acorn Risc-PC, Linux can support the internal IDE disk and 7111da177e4SLinus Torvalds CD-ROM interface, serial and parallel port, and the floppy drive. 7121da177e4SLinus Torvalds 7131da177e4SLinus Torvaldsconfig ARCH_SA1100 7141da177e4SLinus Torvalds bool "SA1100-based" 715b1b3f49cSRussell King select ARCH_MTD_XIP 7167444a72eSMichael Buesch select ARCH_REQUIRE_GPIOLIB 717b1b3f49cSRussell King select ARCH_SPARSEMEM_ENABLE 718b1b3f49cSRussell King select CLKDEV_LOOKUP 719b1b3f49cSRussell King select CLKSRC_MMIO 720b1b3f49cSRussell King select CPU_FREQ 721b1b3f49cSRussell King select CPU_SA1100 722b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 723d0ee9f40SArnd Bergmann select HAVE_IDE 724b1b3f49cSRussell King select ISA 7250cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 726375dec92SRussell King select SPARSE_IRQ 727f999b8bdSMartin Michlmayr help 728f999b8bdSMartin Michlmayr Support for StrongARM 11x0 based boards. 7291da177e4SLinus Torvalds 730b130d5c2SKukjin Kimconfig ARCH_S3C24XX 731b130d5c2SKukjin Kim bool "Samsung S3C24XX SoCs" 73253650430SKukjin Kim select ARCH_REQUIRE_GPIOLIB 733335cce74SArnd Bergmann select ATAGS 734b1b3f49cSRussell King select CLKDEV_LOOKUP 7354280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 7367f78b6ebSRomain Naour select GENERIC_CLOCKEVENTS 737880cf071STomasz Figa select GPIO_SAMSUNG 73820676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 739b130d5c2SKukjin Kim select HAVE_S3C2410_WATCHDOG if WATCHDOG 740b1b3f49cSRussell King select HAVE_S3C_RTC if RTC_CLASS 74117453dd2SHeiko Stuebner select MULTI_IRQ_HANDLER 742c334bc15SRob Herring select NEED_MACH_IO_H 743cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 7441da177e4SLinus Torvalds help 745b130d5c2SKukjin Kim Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443 746b130d5c2SKukjin Kim and S3C2450 SoCs based systems, such as the Simtec Electronics BAST 747b130d5c2SKukjin Kim (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the 748b130d5c2SKukjin Kim Samsung SMDK2410 development board (and derivatives). 74963b1f51bSBen Dooks 750a08ab637SBen Dooksconfig ARCH_S3C64XX 751a08ab637SBen Dooks bool "Samsung S3C64XX" 75289f0ce72SBen Dooks select ARCH_REQUIRE_GPIOLIB 7531db0287aSTomasz Figa select ARM_AMBA 754b1b3f49cSRussell King select ARM_VIC 755335cce74SArnd Bergmann select ATAGS 756b1b3f49cSRussell King select CLKDEV_LOOKUP 7574280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 758ccecba3cSPankaj Dubey select COMMON_CLK_SAMSUNG 75970bacadbSTomasz Figa select CPU_V6K 76004a49b71SRomain Naour select GENERIC_CLOCKEVENTS 761880cf071STomasz Figa select GPIO_SAMSUNG 76220676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 763c39d8d55SKyungmin Park select HAVE_S3C2410_WATCHDOG if WATCHDOG 764b1b3f49cSRussell King select HAVE_TCM 765ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 766b1b3f49cSRussell King select PLAT_SAMSUNG 7674ab75a3fSArnd Bergmann select PM_GENERIC_DOMAINS if PM 768b1b3f49cSRussell King select S3C_DEV_NAND 769b1b3f49cSRussell King select S3C_GPIO_TRACK 770cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 7716e2d9e93STomasz Figa select SAMSUNG_WAKEMASK 77288f59738STomasz Figa select SAMSUNG_WDT_RESET 773a08ab637SBen Dooks help 774a08ab637SBen Dooks Samsung S3C64XX series based systems 775a08ab637SBen Dooks 77649b7a491SKukjin Kimconfig ARCH_S5P64X0 77749b7a491SKukjin Kim bool "Samsung S5P6440 S5P6450" 778335cce74SArnd Bergmann select ATAGS 779d8b22d25SThomas Abraham select CLKDEV_LOOKUP 7804280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 781b1b3f49cSRussell King select CPU_V6 7829e65bbf2SSangbeom Kim select GENERIC_CLOCKEVENTS 783880cf071STomasz Figa select GPIO_SAMSUNG 78420676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 785b1b3f49cSRussell King select HAVE_S3C2410_WATCHDOG if WATCHDOG 786754961a8SKukjin Kim select HAVE_S3C_RTC if RTC_CLASS 78701464226SRob Herring select NEED_MACH_GPIO_H 788cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 789171b3f0dSRussell King select SAMSUNG_WDT_RESET 790c4ffccddSKukjin Kim help 79149b7a491SKukjin Kim Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440, 79249b7a491SKukjin Kim SMDK6450. 793c4ffccddSKukjin Kim 794acc84707SMarek Szyprowskiconfig ARCH_S5PC100 795acc84707SMarek Szyprowski bool "Samsung S5PC100" 79653650430SKukjin Kim select ARCH_REQUIRE_GPIOLIB 797335cce74SArnd Bergmann select ATAGS 79829e8eb0fSThomas Abraham select CLKDEV_LOOKUP 7994280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 8005a7652f2SByungho Min select CPU_V7 8016a5a2e3bSRomain Naour select GENERIC_CLOCKEVENTS 802880cf071STomasz Figa select GPIO_SAMSUNG 80320676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 804c39d8d55SKyungmin Park select HAVE_S3C2410_WATCHDOG if WATCHDOG 805b1b3f49cSRussell King select HAVE_S3C_RTC if RTC_CLASS 80601464226SRob Herring select NEED_MACH_GPIO_H 807cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 808171b3f0dSRussell King select SAMSUNG_WDT_RESET 8095a7652f2SByungho Min help 810acc84707SMarek Szyprowski Samsung S5PC100 series based systems 8115a7652f2SByungho Min 812170f4e42SKukjin Kimconfig ARCH_S5PV210 813170f4e42SKukjin Kim bool "Samsung S5PV210/S5PC110" 8140f75a96bSKamil Debski select ARCH_HAS_HOLES_MEMORYMODEL 815b1b3f49cSRussell King select ARCH_SPARSEMEM_ENABLE 816335cce74SArnd Bergmann select ATAGS 817b2a9dd46SThomas Abraham select CLKDEV_LOOKUP 8184280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 819b1b3f49cSRussell King select CPU_V7 8209e65bbf2SSangbeom Kim select GENERIC_CLOCKEVENTS 821880cf071STomasz Figa select GPIO_SAMSUNG 82220676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 823c39d8d55SKyungmin Park select HAVE_S3C2410_WATCHDOG if WATCHDOG 824b1b3f49cSRussell King select HAVE_S3C_RTC if RTC_CLASS 82501464226SRob Herring select NEED_MACH_GPIO_H 8260cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 827cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 828170f4e42SKukjin Kim help 829170f4e42SKukjin Kim Samsung S5PV210/S5PC110 series based systems 830170f4e42SKukjin Kim 8317c6337e2SKevin Hilmanconfig ARCH_DAVINCI 8327c6337e2SKevin Hilman bool "TI DaVinci" 833b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 834dce1115bSDavid Brownell select ARCH_REQUIRE_GPIOLIB 8356d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 83620e9969bSDavid Brownell select GENERIC_ALLOCATOR 837b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 838dc7ad3b3SRussell King select GENERIC_IRQ_CHIP 839b1b3f49cSRussell King select HAVE_IDE 8403ad7a42dSMatt Porter select TI_PRIV_EDMA 841689e331fSSekhar Nori select USE_OF 842b1b3f49cSRussell King select ZONE_DMA 8437c6337e2SKevin Hilman help 8447c6337e2SKevin Hilman Support for TI's DaVinci platform. 8457c6337e2SKevin Hilman 846a0694861STony Lindgrenconfig ARCH_OMAP1 847a0694861STony Lindgren bool "TI OMAP1" 84800a36698SArnd Bergmann depends on MMU 849b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 850a0694861STony Lindgren select ARCH_OMAP 85121f47fbcSAlexey Charkov select ARCH_REQUIRE_GPIOLIB 852e9a91de7STony Prisk select CLKDEV_LOOKUP 853cee37e50Sviresh kumar select CLKSRC_MMIO 854b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 855a0694861STony Lindgren select GENERIC_IRQ_CHIP 856a0694861STony Lindgren select HAVE_IDE 857a0694861STony Lindgren select IRQ_DOMAIN 858a0694861STony Lindgren select NEED_MACH_IO_H if PCCARD 859a0694861STony Lindgren select NEED_MACH_MEMORY_H 86021f47fbcSAlexey Charkov help 861a0694861STony Lindgren Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx) 86202c981c0SBinghua Duan 8631da177e4SLinus Torvaldsendchoice 8641da177e4SLinus Torvalds 865387798b3SRob Herringmenu "Multiple platform selection" 866387798b3SRob Herring depends on ARCH_MULTIPLATFORM 867387798b3SRob Herring 868387798b3SRob Herringcomment "CPU Core family selection" 869387798b3SRob Herring 870f8afae40SArnd Bergmannconfig ARCH_MULTI_V4 871f8afae40SArnd Bergmann bool "ARMv4 based platforms (FA526)" 872f8afae40SArnd Bergmann depends on !ARCH_MULTI_V6_V7 873f8afae40SArnd Bergmann select ARCH_MULTI_V4_V5 874f8afae40SArnd Bergmann select CPU_FA526 875f8afae40SArnd Bergmann 876387798b3SRob Herringconfig ARCH_MULTI_V4T 877387798b3SRob Herring bool "ARMv4T based platforms (ARM720T, ARM920T, ...)" 878387798b3SRob Herring depends on !ARCH_MULTI_V6_V7 879b1b3f49cSRussell King select ARCH_MULTI_V4_V5 88024e860fbSArnd Bergmann select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \ 88124e860fbSArnd Bergmann CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \ 88224e860fbSArnd Bergmann CPU_ARM925T || CPU_ARM940T) 883387798b3SRob Herring 884387798b3SRob Herringconfig ARCH_MULTI_V5 885387798b3SRob Herring bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)" 886387798b3SRob Herring depends on !ARCH_MULTI_V6_V7 887b1b3f49cSRussell King select ARCH_MULTI_V4_V5 88812567bbdSAndrew Lunn select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \ 88924e860fbSArnd Bergmann CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \ 89024e860fbSArnd Bergmann CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON) 891387798b3SRob Herring 892387798b3SRob Herringconfig ARCH_MULTI_V4_V5 893387798b3SRob Herring bool 894387798b3SRob Herring 895387798b3SRob Herringconfig ARCH_MULTI_V6 8968dda05ccSStephen Boyd bool "ARMv6 based platforms (ARM11)" 897387798b3SRob Herring select ARCH_MULTI_V6_V7 89842f4754aSRob Herring select CPU_V6K 899387798b3SRob Herring 900387798b3SRob Herringconfig ARCH_MULTI_V7 9018dda05ccSStephen Boyd bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)" 902387798b3SRob Herring default y 903387798b3SRob Herring select ARCH_MULTI_V6_V7 904b1b3f49cSRussell King select CPU_V7 90590bc8ac7SRob Herring select HAVE_SMP 906387798b3SRob Herring 907387798b3SRob Herringconfig ARCH_MULTI_V6_V7 908387798b3SRob Herring bool 9099352b05bSRob Herring select MIGHT_HAVE_CACHE_L2X0 910387798b3SRob Herring 911387798b3SRob Herringconfig ARCH_MULTI_CPU_AUTO 912387798b3SRob Herring def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7) 913387798b3SRob Herring select ARCH_MULTI_V5 914387798b3SRob Herring 915387798b3SRob Herringendmenu 916387798b3SRob Herring 91705e2a3deSRob Herringconfig ARCH_VIRT 91805e2a3deSRob Herring bool "Dummy Virtual Machine" if ARCH_MULTI_V7 9194b8b5f25SRob Herring select ARM_AMBA 92005e2a3deSRob Herring select ARM_GIC 92105e2a3deSRob Herring select ARM_PSCI 9224b8b5f25SRob Herring select HAVE_ARM_ARCH_TIMER 92305e2a3deSRob Herring 924ccf50e23SRussell King# 925ccf50e23SRussell King# This is sorted alphabetically by mach-* pathname. However, plat-* 926ccf50e23SRussell King# Kconfigs may be included either alphabetically (according to the 927ccf50e23SRussell King# plat- suffix) or along side the corresponding mach-* source. 928ccf50e23SRussell King# 9293e93a22bSGregory CLEMENTsource "arch/arm/mach-mvebu/Kconfig" 9303e93a22bSGregory CLEMENT 93195b8f20fSRussell Kingsource "arch/arm/mach-at91/Kconfig" 93295b8f20fSRussell King 9331d22924eSAnders Bergsource "arch/arm/mach-axxia/Kconfig" 9341d22924eSAnders Berg 9358ac49e04SChristian Daudtsource "arch/arm/mach-bcm/Kconfig" 9368ac49e04SChristian Daudt 9371c37fa10SSebastian Hesselbarthsource "arch/arm/mach-berlin/Kconfig" 9381c37fa10SSebastian Hesselbarth 9391da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig" 9401da177e4SLinus Torvalds 941d94f944eSAnton Vorontsovsource "arch/arm/mach-cns3xxx/Kconfig" 942d94f944eSAnton Vorontsov 94395b8f20fSRussell Kingsource "arch/arm/mach-davinci/Kconfig" 94495b8f20fSRussell King 94595b8f20fSRussell Kingsource "arch/arm/mach-dove/Kconfig" 94695b8f20fSRussell King 947e7736d47SLennert Buytenheksource "arch/arm/mach-ep93xx/Kconfig" 948e7736d47SLennert Buytenhek 9491da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig" 9501da177e4SLinus Torvalds 95159d3a193SPaulius Zaleckassource "arch/arm/mach-gemini/Kconfig" 95259d3a193SPaulius Zaleckas 953387798b3SRob Herringsource "arch/arm/mach-highbank/Kconfig" 954387798b3SRob Herring 955389ee0c2SHaojian Zhuangsource "arch/arm/mach-hisi/Kconfig" 956389ee0c2SHaojian Zhuang 9571da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig" 9581da177e4SLinus Torvalds 9593f7e5815SLennert Buytenheksource "arch/arm/mach-iop32x/Kconfig" 9603f7e5815SLennert Buytenhek 9613f7e5815SLennert Buytenheksource "arch/arm/mach-iop33x/Kconfig" 9621da177e4SLinus Torvalds 963285f5fa7SDan Williamssource "arch/arm/mach-iop13xx/Kconfig" 964285f5fa7SDan Williams 9651da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig" 9661da177e4SLinus Torvalds 967828989adSSantosh Shilimkarsource "arch/arm/mach-keystone/Kconfig" 968828989adSSantosh Shilimkar 96995b8f20fSRussell Kingsource "arch/arm/mach-kirkwood/Kconfig" 97095b8f20fSRussell King 97195b8f20fSRussell Kingsource "arch/arm/mach-ks8695/Kconfig" 97295b8f20fSRussell King 97395b8f20fSRussell Kingsource "arch/arm/mach-msm/Kconfig" 97495b8f20fSRussell King 97517723fd3SJonas Jensensource "arch/arm/mach-moxart/Kconfig" 97617723fd3SJonas Jensen 977794d15b2SStanislav Samsonovsource "arch/arm/mach-mv78xx0/Kconfig" 978794d15b2SStanislav Samsonov 9793995eb82SShawn Guosource "arch/arm/mach-imx/Kconfig" 9801da177e4SLinus Torvalds 9811d3f33d5SShawn Guosource "arch/arm/mach-mxs/Kconfig" 9821d3f33d5SShawn Guo 98395b8f20fSRussell Kingsource "arch/arm/mach-netx/Kconfig" 98449cbe786SEric Miao 98595b8f20fSRussell Kingsource "arch/arm/mach-nomadik/Kconfig" 98695b8f20fSRussell King 9879851ca57SDaniel Tangsource "arch/arm/mach-nspire/Kconfig" 9889851ca57SDaniel Tang 989d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig" 990d48af15eSTony Lindgren 991d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig" 9921da177e4SLinus Torvalds 9931dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig" 9941dbae815STony Lindgren 9959dd0b194SLennert Buytenheksource "arch/arm/mach-orion5x/Kconfig" 996585cf175STzachi Perelstein 997387798b3SRob Herringsource "arch/arm/mach-picoxcell/Kconfig" 998387798b3SRob Herring 99995b8f20fSRussell Kingsource "arch/arm/mach-pxa/Kconfig" 100095b8f20fSRussell Kingsource "arch/arm/plat-pxa/Kconfig" 10011da177e4SLinus Torvalds 100295b8f20fSRussell Kingsource "arch/arm/mach-mmp/Kconfig" 100395b8f20fSRussell King 10048fc1b0f8SKumar Galasource "arch/arm/mach-qcom/Kconfig" 10058fc1b0f8SKumar Gala 100695b8f20fSRussell Kingsource "arch/arm/mach-realview/Kconfig" 100795b8f20fSRussell King 1008d63dc051SHeiko Stuebnersource "arch/arm/mach-rockchip/Kconfig" 1009d63dc051SHeiko Stuebner 101095b8f20fSRussell Kingsource "arch/arm/mach-sa1100/Kconfig" 1011edabd38eSSaeed Bishara 1012387798b3SRob Herringsource "arch/arm/mach-socfpga/Kconfig" 1013387798b3SRob Herring 1014a7ed099fSArnd Bergmannsource "arch/arm/mach-spear/Kconfig" 1015a21765a7SBen Dooks 101665ebcc11SSrinivas Kandagatlasource "arch/arm/mach-sti/Kconfig" 101765ebcc11SSrinivas Kandagatla 101885fd6d63SKukjin Kimsource "arch/arm/mach-s3c24xx/Kconfig" 10191da177e4SLinus Torvalds 1020431107eaSBen Dookssource "arch/arm/mach-s3c64xx/Kconfig" 1021a08ab637SBen Dooks 102249b7a491SKukjin Kimsource "arch/arm/mach-s5p64x0/Kconfig" 1023c4ffccddSKukjin Kim 10245a7652f2SByungho Minsource "arch/arm/mach-s5pc100/Kconfig" 10255a7652f2SByungho Min 1026170f4e42SKukjin Kimsource "arch/arm/mach-s5pv210/Kconfig" 1027170f4e42SKukjin Kim 102883014579SKukjin Kimsource "arch/arm/mach-exynos/Kconfig" 1029e509b289SRob Herringsource "arch/arm/plat-samsung/Kconfig" 1030cc0e72b8SChanghwan Youn 1031882d01f9SRussell Kingsource "arch/arm/mach-shmobile/Kconfig" 10321da177e4SLinus Torvalds 10333b52634fSMaxime Ripardsource "arch/arm/mach-sunxi/Kconfig" 10343b52634fSMaxime Ripard 1035156a0997SBarry Songsource "arch/arm/mach-prima2/Kconfig" 1036156a0997SBarry Song 1037c5f80065SErik Gillingsource "arch/arm/mach-tegra/Kconfig" 1038c5f80065SErik Gilling 103995b8f20fSRussell Kingsource "arch/arm/mach-u300/Kconfig" 10401da177e4SLinus Torvalds 104195b8f20fSRussell Kingsource "arch/arm/mach-ux500/Kconfig" 10421da177e4SLinus Torvalds 10431da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig" 10441da177e4SLinus Torvalds 1045ceade897SRussell Kingsource "arch/arm/mach-vexpress/Kconfig" 1046420c34e4SRussell Kingsource "arch/arm/plat-versatile/Kconfig" 1047ceade897SRussell King 10486f35f9a9STony Prisksource "arch/arm/mach-vt8500/Kconfig" 10496f35f9a9STony Prisk 10507ec80ddfSwanzongshunsource "arch/arm/mach-w90x900/Kconfig" 10517ec80ddfSwanzongshun 10529a45eb69SJosh Cartwrightsource "arch/arm/mach-zynq/Kconfig" 10539a45eb69SJosh Cartwright 10541da177e4SLinus Torvalds# Definitions to make life easier 10551da177e4SLinus Torvaldsconfig ARCH_ACORN 10561da177e4SLinus Torvalds bool 10571da177e4SLinus Torvalds 10587ae1f7ecSLennert Buytenhekconfig PLAT_IOP 10597ae1f7ecSLennert Buytenhek bool 1060469d3044SMikael Pettersson select GENERIC_CLOCKEVENTS 10617ae1f7ecSLennert Buytenhek 106269b02f6aSLennert Buytenhekconfig PLAT_ORION 106369b02f6aSLennert Buytenhek bool 1064bfe45e0bSRussell King select CLKSRC_MMIO 1065b1b3f49cSRussell King select COMMON_CLK 1066dc7ad3b3SRussell King select GENERIC_IRQ_CHIP 1067278b45b0SAndrew Lunn select IRQ_DOMAIN 106869b02f6aSLennert Buytenhek 1069abcda1dcSThomas Petazzoniconfig PLAT_ORION_LEGACY 1070abcda1dcSThomas Petazzoni bool 1071abcda1dcSThomas Petazzoni select PLAT_ORION 1072abcda1dcSThomas Petazzoni 1073bd5ce433SEric Miaoconfig PLAT_PXA 1074bd5ce433SEric Miao bool 1075bd5ce433SEric Miao 1076f4b8b319SRussell Kingconfig PLAT_VERSATILE 1077f4b8b319SRussell King bool 1078f4b8b319SRussell King 1079e3887714SRussell Kingconfig ARM_TIMER_SP804 1080e3887714SRussell King bool 1081bfe45e0bSRussell King select CLKSRC_MMIO 10827a0eca71SRob Herring select CLKSRC_OF if OF 1083e3887714SRussell King 1084d9a1beaaSAlexandre Courbotsource "arch/arm/firmware/Kconfig" 1085d9a1beaaSAlexandre Courbot 10861da177e4SLinus Torvaldssource arch/arm/mm/Kconfig 10871da177e4SLinus Torvalds 1088afe4b25eSLennert Buytenhekconfig IWMMXT 1089d93003e8SSebastian Hesselbarth bool "Enable iWMMXt support" 1090d93003e8SSebastian Hesselbarth depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B 1091d93003e8SSebastian Hesselbarth default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B 1092afe4b25eSLennert Buytenhek help 1093afe4b25eSLennert Buytenhek Enable support for iWMMXt context switching at run time if 1094afe4b25eSLennert Buytenhek running on a CPU that supports it. 1095afe4b25eSLennert Buytenhek 109652108641Seric miaoconfig MULTI_IRQ_HANDLER 109752108641Seric miao bool 109852108641Seric miao help 109952108641Seric miao Allow each machine to specify it's own IRQ handler at run time. 110052108641Seric miao 11013b93e7b0SHyok S. Choiif !MMU 11023b93e7b0SHyok S. Choisource "arch/arm/Kconfig-nommu" 11033b93e7b0SHyok S. Choiendif 11043b93e7b0SHyok S. Choi 11053e0a07f8SGregory CLEMENTconfig PJ4B_ERRATA_4742 11063e0a07f8SGregory CLEMENT bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation" 11073e0a07f8SGregory CLEMENT depends on CPU_PJ4B && MACH_ARMADA_370 11083e0a07f8SGregory CLEMENT default y 11093e0a07f8SGregory CLEMENT help 11103e0a07f8SGregory CLEMENT When coming out of either a Wait for Interrupt (WFI) or a Wait for 11113e0a07f8SGregory CLEMENT Event (WFE) IDLE states, a specific timing sensitivity exists between 11123e0a07f8SGregory CLEMENT the retiring WFI/WFE instructions and the newly issued subsequent 11133e0a07f8SGregory CLEMENT instructions. This sensitivity can result in a CPU hang scenario. 11143e0a07f8SGregory CLEMENT Workaround: 11153e0a07f8SGregory CLEMENT The software must insert either a Data Synchronization Barrier (DSB) 11163e0a07f8SGregory CLEMENT or Data Memory Barrier (DMB) command immediately after the WFI/WFE 11173e0a07f8SGregory CLEMENT instruction 11183e0a07f8SGregory CLEMENT 1119f0c4b8d6SWill Deaconconfig ARM_ERRATA_326103 1120f0c4b8d6SWill Deacon bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory" 1121f0c4b8d6SWill Deacon depends on CPU_V6 1122f0c4b8d6SWill Deacon help 1123f0c4b8d6SWill Deacon Executing a SWP instruction to read-only memory does not set bit 11 1124f0c4b8d6SWill Deacon of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to 1125f0c4b8d6SWill Deacon treat the access as a read, preventing a COW from occurring and 1126f0c4b8d6SWill Deacon causing the faulting task to livelock. 1127f0c4b8d6SWill Deacon 11289cba3cccSCatalin Marinasconfig ARM_ERRATA_411920 11299cba3cccSCatalin Marinas bool "ARM errata: Invalidation of the Instruction Cache operation can fail" 1130e399b1a4SRussell King depends on CPU_V6 || CPU_V6K 11319cba3cccSCatalin Marinas help 11329cba3cccSCatalin Marinas Invalidation of the Instruction Cache operation can 11339cba3cccSCatalin Marinas fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. 11349cba3cccSCatalin Marinas It does not affect the MPCore. This option enables the ARM Ltd. 11359cba3cccSCatalin Marinas recommended workaround. 11369cba3cccSCatalin Marinas 11377ce236fcSCatalin Marinasconfig ARM_ERRATA_430973 11387ce236fcSCatalin Marinas bool "ARM errata: Stale prediction on replaced interworking branch" 11397ce236fcSCatalin Marinas depends on CPU_V7 11407ce236fcSCatalin Marinas help 11417ce236fcSCatalin Marinas This option enables the workaround for the 430973 Cortex-A8 11427ce236fcSCatalin Marinas (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb 11437ce236fcSCatalin Marinas interworking branch is replaced with another code sequence at the 11447ce236fcSCatalin Marinas same virtual address, whether due to self-modifying code or virtual 11457ce236fcSCatalin Marinas to physical address re-mapping, Cortex-A8 does not recover from the 11467ce236fcSCatalin Marinas stale interworking branch prediction. This results in Cortex-A8 11477ce236fcSCatalin Marinas executing the new code sequence in the incorrect ARM or Thumb state. 11487ce236fcSCatalin Marinas The workaround enables the BTB/BTAC operations by setting ACTLR.IBE 11497ce236fcSCatalin Marinas and also flushes the branch target cache at every context switch. 11507ce236fcSCatalin Marinas Note that setting specific bits in the ACTLR register may not be 11517ce236fcSCatalin Marinas available in non-secure mode. 11527ce236fcSCatalin Marinas 1153855c551fSCatalin Marinasconfig ARM_ERRATA_458693 1154855c551fSCatalin Marinas bool "ARM errata: Processor deadlock when a false hazard is created" 1155855c551fSCatalin Marinas depends on CPU_V7 115662e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1157855c551fSCatalin Marinas help 1158855c551fSCatalin Marinas This option enables the workaround for the 458693 Cortex-A8 (r2p0) 1159855c551fSCatalin Marinas erratum. For very specific sequences of memory operations, it is 1160855c551fSCatalin Marinas possible for a hazard condition intended for a cache line to instead 1161855c551fSCatalin Marinas be incorrectly associated with a different cache line. This false 1162855c551fSCatalin Marinas hazard might then cause a processor deadlock. The workaround enables 1163855c551fSCatalin Marinas the L1 caching of the NEON accesses and disables the PLD instruction 1164855c551fSCatalin Marinas in the ACTLR register. Note that setting specific bits in the ACTLR 1165855c551fSCatalin Marinas register may not be available in non-secure mode. 1166855c551fSCatalin Marinas 11670516e464SCatalin Marinasconfig ARM_ERRATA_460075 11680516e464SCatalin Marinas bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" 11690516e464SCatalin Marinas depends on CPU_V7 117062e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 11710516e464SCatalin Marinas help 11720516e464SCatalin Marinas This option enables the workaround for the 460075 Cortex-A8 (r2p0) 11730516e464SCatalin Marinas erratum. Any asynchronous access to the L2 cache may encounter a 11740516e464SCatalin Marinas situation in which recent store transactions to the L2 cache are lost 11750516e464SCatalin Marinas and overwritten with stale memory contents from external memory. The 11760516e464SCatalin Marinas workaround disables the write-allocate mode for the L2 cache via the 11770516e464SCatalin Marinas ACTLR register. Note that setting specific bits in the ACTLR register 11780516e464SCatalin Marinas may not be available in non-secure mode. 11790516e464SCatalin Marinas 11809f05027cSWill Deaconconfig ARM_ERRATA_742230 11819f05027cSWill Deacon bool "ARM errata: DMB operation may be faulty" 11829f05027cSWill Deacon depends on CPU_V7 && SMP 118362e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 11849f05027cSWill Deacon help 11859f05027cSWill Deacon This option enables the workaround for the 742230 Cortex-A9 11869f05027cSWill Deacon (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction 11879f05027cSWill Deacon between two write operations may not ensure the correct visibility 11889f05027cSWill Deacon ordering of the two writes. This workaround sets a specific bit in 11899f05027cSWill Deacon the diagnostic register of the Cortex-A9 which causes the DMB 11909f05027cSWill Deacon instruction to behave as a DSB, ensuring the correct behaviour of 11919f05027cSWill Deacon the two writes. 11929f05027cSWill Deacon 1193a672e99bSWill Deaconconfig ARM_ERRATA_742231 1194a672e99bSWill Deacon bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption" 1195a672e99bSWill Deacon depends on CPU_V7 && SMP 119662e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1197a672e99bSWill Deacon help 1198a672e99bSWill Deacon This option enables the workaround for the 742231 Cortex-A9 1199a672e99bSWill Deacon (r2p0..r2p2) erratum. Under certain conditions, specific to the 1200a672e99bSWill Deacon Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode, 1201a672e99bSWill Deacon accessing some data located in the same cache line, may get corrupted 1202a672e99bSWill Deacon data due to bad handling of the address hazard when the line gets 1203a672e99bSWill Deacon replaced from one of the CPUs at the same time as another CPU is 1204a672e99bSWill Deacon accessing it. This workaround sets specific bits in the diagnostic 1205a672e99bSWill Deacon register of the Cortex-A9 which reduces the linefill issuing 1206a672e99bSWill Deacon capabilities of the processor. 1207a672e99bSWill Deacon 120869155794SJon Medhurstconfig ARM_ERRATA_643719 120969155794SJon Medhurst bool "ARM errata: LoUIS bit field in CLIDR register is incorrect" 121069155794SJon Medhurst depends on CPU_V7 && SMP 121169155794SJon Medhurst help 121269155794SJon Medhurst This option enables the workaround for the 643719 Cortex-A9 (prior to 121369155794SJon Medhurst r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR 121469155794SJon Medhurst register returns zero when it should return one. The workaround 121569155794SJon Medhurst corrects this value, ensuring cache maintenance operations which use 121669155794SJon Medhurst it behave as intended and avoiding data corruption. 121769155794SJon Medhurst 1218cdf357f1SWill Deaconconfig ARM_ERRATA_720789 1219cdf357f1SWill Deacon bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID" 1220e66dc745SDave Martin depends on CPU_V7 1221cdf357f1SWill Deacon help 1222cdf357f1SWill Deacon This option enables the workaround for the 720789 Cortex-A9 (prior to 1223cdf357f1SWill Deacon r2p0) erratum. A faulty ASID can be sent to the other CPUs for the 1224cdf357f1SWill Deacon broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS. 1225cdf357f1SWill Deacon As a consequence of this erratum, some TLB entries which should be 1226cdf357f1SWill Deacon invalidated are not, resulting in an incoherency in the system page 1227cdf357f1SWill Deacon tables. The workaround changes the TLB flushing routines to invalidate 1228cdf357f1SWill Deacon entries regardless of the ASID. 1229475d92fcSWill Deacon 1230475d92fcSWill Deaconconfig ARM_ERRATA_743622 1231475d92fcSWill Deacon bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption" 1232475d92fcSWill Deacon depends on CPU_V7 123362e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1234475d92fcSWill Deacon help 1235475d92fcSWill Deacon This option enables the workaround for the 743622 Cortex-A9 1236efbc74acSWill Deacon (r2p*) erratum. Under very rare conditions, a faulty 1237475d92fcSWill Deacon optimisation in the Cortex-A9 Store Buffer may lead to data 1238475d92fcSWill Deacon corruption. This workaround sets a specific bit in the diagnostic 1239475d92fcSWill Deacon register of the Cortex-A9 which disables the Store Buffer 1240475d92fcSWill Deacon optimisation, preventing the defect from occurring. This has no 1241475d92fcSWill Deacon visible impact on the overall performance or power consumption of the 1242475d92fcSWill Deacon processor. 1243475d92fcSWill Deacon 12449a27c27cSWill Deaconconfig ARM_ERRATA_751472 12459a27c27cSWill Deacon bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation" 1246ba90c516SDave Martin depends on CPU_V7 124762e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 12489a27c27cSWill Deacon help 12499a27c27cSWill Deacon This option enables the workaround for the 751472 Cortex-A9 (prior 12509a27c27cSWill Deacon to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the 12519a27c27cSWill Deacon completion of a following broadcasted operation if the second 12529a27c27cSWill Deacon operation is received by a CPU before the ICIALLUIS has completed, 12539a27c27cSWill Deacon potentially leading to corrupted entries in the cache or TLB. 12549a27c27cSWill Deacon 1255fcbdc5feSWill Deaconconfig ARM_ERRATA_754322 1256fcbdc5feSWill Deacon bool "ARM errata: possible faulty MMU translations following an ASID switch" 1257fcbdc5feSWill Deacon depends on CPU_V7 1258fcbdc5feSWill Deacon help 1259fcbdc5feSWill Deacon This option enables the workaround for the 754322 Cortex-A9 (r2p*, 1260fcbdc5feSWill Deacon r3p*) erratum. A speculative memory access may cause a page table walk 1261fcbdc5feSWill Deacon which starts prior to an ASID switch but completes afterwards. This 1262fcbdc5feSWill Deacon can populate the micro-TLB with a stale entry which may be hit with 1263fcbdc5feSWill Deacon the new ASID. This workaround places two dsb instructions in the mm 1264fcbdc5feSWill Deacon switching code so that no page table walks can cross the ASID switch. 1265fcbdc5feSWill Deacon 12665dab26afSWill Deaconconfig ARM_ERRATA_754327 12675dab26afSWill Deacon bool "ARM errata: no automatic Store Buffer drain" 12685dab26afSWill Deacon depends on CPU_V7 && SMP 12695dab26afSWill Deacon help 12705dab26afSWill Deacon This option enables the workaround for the 754327 Cortex-A9 (prior to 12715dab26afSWill Deacon r2p0) erratum. The Store Buffer does not have any automatic draining 12725dab26afSWill Deacon mechanism and therefore a livelock may occur if an external agent 12735dab26afSWill Deacon continuously polls a memory location waiting to observe an update. 12745dab26afSWill Deacon This workaround defines cpu_relax() as smp_mb(), preventing correctly 12755dab26afSWill Deacon written polling loops from denying visibility of updates to memory. 12765dab26afSWill Deacon 1277145e10e1SCatalin Marinasconfig ARM_ERRATA_364296 1278145e10e1SCatalin Marinas bool "ARM errata: Possible cache data corruption with hit-under-miss enabled" 1279fd832478SFabio Estevam depends on CPU_V6 1280145e10e1SCatalin Marinas help 1281145e10e1SCatalin Marinas This options enables the workaround for the 364296 ARM1136 1282145e10e1SCatalin Marinas r0p2 erratum (possible cache data corruption with 1283145e10e1SCatalin Marinas hit-under-miss enabled). It sets the undocumented bit 31 in 1284145e10e1SCatalin Marinas the auxiliary control register and the FI bit in the control 1285145e10e1SCatalin Marinas register, thus disabling hit-under-miss without putting the 1286145e10e1SCatalin Marinas processor into full low interrupt latency mode. ARM11MPCore 1287145e10e1SCatalin Marinas is not affected. 1288145e10e1SCatalin Marinas 1289f630c1bdSWill Deaconconfig ARM_ERRATA_764369 1290f630c1bdSWill Deacon bool "ARM errata: Data cache line maintenance operation by MVA may not succeed" 1291f630c1bdSWill Deacon depends on CPU_V7 && SMP 1292f630c1bdSWill Deacon help 1293f630c1bdSWill Deacon This option enables the workaround for erratum 764369 1294f630c1bdSWill Deacon affecting Cortex-A9 MPCore with two or more processors (all 1295f630c1bdSWill Deacon current revisions). Under certain timing circumstances, a data 1296f630c1bdSWill Deacon cache line maintenance operation by MVA targeting an Inner 1297f630c1bdSWill Deacon Shareable memory region may fail to proceed up to either the 1298f630c1bdSWill Deacon Point of Coherency or to the Point of Unification of the 1299f630c1bdSWill Deacon system. This workaround adds a DSB instruction before the 1300f630c1bdSWill Deacon relevant cache maintenance functions and sets a specific bit 1301f630c1bdSWill Deacon in the diagnostic control register of the SCU. 1302f630c1bdSWill Deacon 13037253b85cSSimon Hormanconfig ARM_ERRATA_775420 13047253b85cSSimon Horman bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock" 13057253b85cSSimon Horman depends on CPU_V7 13067253b85cSSimon Horman help 13077253b85cSSimon Horman This option enables the workaround for the 775420 Cortex-A9 (r2p2, 13087253b85cSSimon Horman r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance 13097253b85cSSimon Horman operation aborts with MMU exception, it might cause the processor 13107253b85cSSimon Horman to deadlock. This workaround puts DSB before executing ISB if 13117253b85cSSimon Horman an abort may occur on cache maintenance. 13127253b85cSSimon Horman 131393dc6887SCatalin Marinasconfig ARM_ERRATA_798181 131493dc6887SCatalin Marinas bool "ARM errata: TLBI/DSB failure on Cortex-A15" 131593dc6887SCatalin Marinas depends on CPU_V7 && SMP 131693dc6887SCatalin Marinas help 131793dc6887SCatalin Marinas On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not 131893dc6887SCatalin Marinas adequately shooting down all use of the old entries. This 131993dc6887SCatalin Marinas option enables the Linux kernel workaround for this erratum 132093dc6887SCatalin Marinas which sends an IPI to the CPUs that are running the same ASID 132193dc6887SCatalin Marinas as the one being invalidated. 132293dc6887SCatalin Marinas 132384b6504fSWill Deaconconfig ARM_ERRATA_773022 132484b6504fSWill Deacon bool "ARM errata: incorrect instructions may be executed from loop buffer" 132584b6504fSWill Deacon depends on CPU_V7 132684b6504fSWill Deacon help 132784b6504fSWill Deacon This option enables the workaround for the 773022 Cortex-A15 132884b6504fSWill Deacon (up to r0p4) erratum. In certain rare sequences of code, the 132984b6504fSWill Deacon loop buffer may deliver incorrect instructions. This 133084b6504fSWill Deacon workaround disables the loop buffer to avoid the erratum. 133184b6504fSWill Deacon 13321da177e4SLinus Torvaldsendmenu 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvaldssource "arch/arm/common/Kconfig" 13351da177e4SLinus Torvalds 13361da177e4SLinus Torvaldsmenu "Bus support" 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvaldsconfig ARM_AMBA 13391da177e4SLinus Torvalds bool 13401da177e4SLinus Torvalds 13411da177e4SLinus Torvaldsconfig ISA 13421da177e4SLinus Torvalds bool 13431da177e4SLinus Torvalds help 13441da177e4SLinus Torvalds Find out whether you have ISA slots on your motherboard. ISA is the 13451da177e4SLinus Torvalds name of a bus system, i.e. the way the CPU talks to the other stuff 13461da177e4SLinus Torvalds inside your box. Other bus systems are PCI, EISA, MicroChannel 13471da177e4SLinus Torvalds (MCA) or VESA. ISA is an older system, now being displaced by PCI; 13481da177e4SLinus Torvalds newer boards don't support it. If you have ISA, say Y, otherwise N. 13491da177e4SLinus Torvalds 1350065909b9SRussell King# Select ISA DMA controller support 13511da177e4SLinus Torvaldsconfig ISA_DMA 13521da177e4SLinus Torvalds bool 1353065909b9SRussell King select ISA_DMA_API 13541da177e4SLinus Torvalds 1355065909b9SRussell King# Select ISA DMA interface 13565cae841bSAl Viroconfig ISA_DMA_API 13575cae841bSAl Viro bool 13585cae841bSAl Viro 13591da177e4SLinus Torvaldsconfig PCI 13600b05da72SHans Ulli Kroll bool "PCI support" if MIGHT_HAVE_PCI 13611da177e4SLinus Torvalds help 13621da177e4SLinus Torvalds Find out whether you have a PCI motherboard. PCI is the name of a 13631da177e4SLinus Torvalds bus system, i.e. the way the CPU talks to the other stuff inside 13641da177e4SLinus Torvalds your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 13651da177e4SLinus Torvalds VESA. If you have PCI, say Y, otherwise N. 13661da177e4SLinus Torvalds 136752882173SAnton Vorontsovconfig PCI_DOMAINS 136852882173SAnton Vorontsov bool 136952882173SAnton Vorontsov depends on PCI 137052882173SAnton Vorontsov 1371b080ac8aSMarcelo Roberto Jimenezconfig PCI_NANOENGINE 1372b080ac8aSMarcelo Roberto Jimenez bool "BSE nanoEngine PCI support" 1373b080ac8aSMarcelo Roberto Jimenez depends on SA1100_NANOENGINE 1374b080ac8aSMarcelo Roberto Jimenez help 1375b080ac8aSMarcelo Roberto Jimenez Enable PCI on the BSE nanoEngine board. 1376b080ac8aSMarcelo Roberto Jimenez 137736e23590SMatthew Wilcoxconfig PCI_SYSCALL 137836e23590SMatthew Wilcox def_bool PCI 137936e23590SMatthew Wilcox 1380a0113a99SMike Rapoportconfig PCI_HOST_ITE8152 1381a0113a99SMike Rapoport bool 1382a0113a99SMike Rapoport depends on PCI && MACH_ARMCORE 1383a0113a99SMike Rapoport default y 1384a0113a99SMike Rapoport select DMABOUNCE 1385a0113a99SMike Rapoport 13861da177e4SLinus Torvaldssource "drivers/pci/Kconfig" 13873f06d157SJingoo Hansource "drivers/pci/pcie/Kconfig" 13881da177e4SLinus Torvalds 13891da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig" 13901da177e4SLinus Torvalds 13911da177e4SLinus Torvaldsendmenu 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvaldsmenu "Kernel Features" 13941da177e4SLinus Torvalds 13953b55658aSDave Martinconfig HAVE_SMP 13963b55658aSDave Martin bool 13973b55658aSDave Martin help 13983b55658aSDave Martin This option should be selected by machines which have an SMP- 13993b55658aSDave Martin capable CPU. 14003b55658aSDave Martin 14013b55658aSDave Martin The only effect of this option is to make the SMP-related 14023b55658aSDave Martin options available to the user for configuration. 14033b55658aSDave Martin 14041da177e4SLinus Torvaldsconfig SMP 1405bb2d8130SRussell King bool "Symmetric Multi-Processing" 1406fbb4ddacSRussell King depends on CPU_V6K || CPU_V7 1407bc28248eSRussell King depends on GENERIC_CLOCKEVENTS 14083b55658aSDave Martin depends on HAVE_SMP 1409801bb21cSJonathan Austin depends on MMU || ARM_MPU 14101da177e4SLinus Torvalds help 14111da177e4SLinus Torvalds This enables support for systems with more than one CPU. If you have 14124a474157SRobert Graffham a system with only one CPU, say N. If you have a system with more 14134a474157SRobert Graffham than one CPU, say Y. 14141da177e4SLinus Torvalds 14154a474157SRobert Graffham If you say N here, the kernel will run on uni- and multiprocessor 14161da177e4SLinus Torvalds machines, but will use only one CPU of a multiprocessor machine. If 14174a474157SRobert Graffham you say Y here, the kernel will run on many, but not all, 14184a474157SRobert Graffham uniprocessor machines. On a uniprocessor machine, the kernel 14194a474157SRobert Graffham will run faster if you say N here. 14201da177e4SLinus Torvalds 1421395cf969SPaul Bolle See also <file:Documentation/x86/i386/IO-APIC.txt>, 14221da177e4SLinus Torvalds <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 142350a23e6eSJustin P. Mattock <http://tldp.org/HOWTO/SMP-HOWTO.html>. 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds If you don't know what to do here, say N. 14261da177e4SLinus Torvalds 1427f00ec48fSRussell Kingconfig SMP_ON_UP 1428f00ec48fSRussell King bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)" 1429801bb21cSJonathan Austin depends on SMP && !XIP_KERNEL && MMU 1430f00ec48fSRussell King default y 1431f00ec48fSRussell King help 1432f00ec48fSRussell King SMP kernels contain instructions which fail on non-SMP processors. 1433f00ec48fSRussell King Enabling this option allows the kernel to modify itself to make 1434f00ec48fSRussell King these instructions safe. Disabling it allows about 1K of space 1435f00ec48fSRussell King savings. 1436f00ec48fSRussell King 1437f00ec48fSRussell King If you don't know what to do here, say Y. 1438f00ec48fSRussell King 1439c9018aabSVincent Guittotconfig ARM_CPU_TOPOLOGY 1440c9018aabSVincent Guittot bool "Support cpu topology definition" 1441c9018aabSVincent Guittot depends on SMP && CPU_V7 1442c9018aabSVincent Guittot default y 1443c9018aabSVincent Guittot help 1444c9018aabSVincent Guittot Support ARM cpu topology definition. The MPIDR register defines 1445c9018aabSVincent Guittot affinity between processors which is then used to describe the cpu 1446c9018aabSVincent Guittot topology of an ARM System. 1447c9018aabSVincent Guittot 1448c9018aabSVincent Guittotconfig SCHED_MC 1449c9018aabSVincent Guittot bool "Multi-core scheduler support" 1450c9018aabSVincent Guittot depends on ARM_CPU_TOPOLOGY 1451c9018aabSVincent Guittot help 1452c9018aabSVincent Guittot Multi-core scheduler support improves the CPU scheduler's decision 1453c9018aabSVincent Guittot making when dealing with multi-core CPU chips at a cost of slightly 1454c9018aabSVincent Guittot increased overhead in some places. If unsure say N here. 1455c9018aabSVincent Guittot 1456c9018aabSVincent Guittotconfig SCHED_SMT 1457c9018aabSVincent Guittot bool "SMT scheduler support" 1458c9018aabSVincent Guittot depends on ARM_CPU_TOPOLOGY 1459c9018aabSVincent Guittot help 1460c9018aabSVincent Guittot Improves the CPU scheduler's decision making when dealing with 1461c9018aabSVincent Guittot MultiThreading at a cost of slightly increased overhead in some 1462c9018aabSVincent Guittot places. If unsure say N here. 1463c9018aabSVincent Guittot 1464a8cbcd92SRussell Kingconfig HAVE_ARM_SCU 1465a8cbcd92SRussell King bool 1466a8cbcd92SRussell King help 1467a8cbcd92SRussell King This option enables support for the ARM system coherency unit 1468a8cbcd92SRussell King 14698a4da6e3SMark Rutlandconfig HAVE_ARM_ARCH_TIMER 1470022c03a2SMarc Zyngier bool "Architected timer support" 1471022c03a2SMarc Zyngier depends on CPU_V7 14728a4da6e3SMark Rutland select ARM_ARCH_TIMER 14730c403462SWill Deacon select GENERIC_CLOCKEVENTS 1474022c03a2SMarc Zyngier help 1475022c03a2SMarc Zyngier This option enables support for the ARM architected timer 1476022c03a2SMarc Zyngier 1477f32f4ce2SRussell Kingconfig HAVE_ARM_TWD 1478f32f4ce2SRussell King bool 1479f32f4ce2SRussell King depends on SMP 1480da4a686aSRob Herring select CLKSRC_OF if OF 1481f32f4ce2SRussell King help 1482f32f4ce2SRussell King This options enables support for the ARM timer and watchdog unit 1483f32f4ce2SRussell King 1484e8db288eSNicolas Pitreconfig MCPM 1485e8db288eSNicolas Pitre bool "Multi-Cluster Power Management" 1486e8db288eSNicolas Pitre depends on CPU_V7 && SMP 1487e8db288eSNicolas Pitre help 1488e8db288eSNicolas Pitre This option provides the common power management infrastructure 1489e8db288eSNicolas Pitre for (multi-)cluster based systems, such as big.LITTLE based 1490e8db288eSNicolas Pitre systems. 1491e8db288eSNicolas Pitre 14921c33be57SNicolas Pitreconfig BIG_LITTLE 14931c33be57SNicolas Pitre bool "big.LITTLE support (Experimental)" 14941c33be57SNicolas Pitre depends on CPU_V7 && SMP 14951c33be57SNicolas Pitre select MCPM 14961c33be57SNicolas Pitre help 14971c33be57SNicolas Pitre This option enables support selections for the big.LITTLE 14981c33be57SNicolas Pitre system architecture. 14991c33be57SNicolas Pitre 15001c33be57SNicolas Pitreconfig BL_SWITCHER 15011c33be57SNicolas Pitre bool "big.LITTLE switcher support" 15021c33be57SNicolas Pitre depends on BIG_LITTLE && MCPM && HOTPLUG_CPU 15031c33be57SNicolas Pitre select ARM_CPU_SUSPEND 150451aaf81fSRussell King select CPU_PM 15051c33be57SNicolas Pitre help 15061c33be57SNicolas Pitre The big.LITTLE "switcher" provides the core functionality to 15071c33be57SNicolas Pitre transparently handle transition between a cluster of A15's 15081c33be57SNicolas Pitre and a cluster of A7's in a big.LITTLE system. 15091c33be57SNicolas Pitre 1510b22537c6SNicolas Pitreconfig BL_SWITCHER_DUMMY_IF 1511b22537c6SNicolas Pitre tristate "Simple big.LITTLE switcher user interface" 1512b22537c6SNicolas Pitre depends on BL_SWITCHER && DEBUG_KERNEL 1513b22537c6SNicolas Pitre help 1514b22537c6SNicolas Pitre This is a simple and dummy char dev interface to control 1515b22537c6SNicolas Pitre the big.LITTLE switcher core code. It is meant for 1516b22537c6SNicolas Pitre debugging purposes only. 1517b22537c6SNicolas Pitre 15188d5796d2SLennert Buytenhekchoice 15198d5796d2SLennert Buytenhek prompt "Memory split" 1520006fa259SRussell King depends on MMU 15218d5796d2SLennert Buytenhek default VMSPLIT_3G 15228d5796d2SLennert Buytenhek help 15238d5796d2SLennert Buytenhek Select the desired split between kernel and user memory. 15248d5796d2SLennert Buytenhek 15258d5796d2SLennert Buytenhek If you are not absolutely sure what you are doing, leave this 15268d5796d2SLennert Buytenhek option alone! 15278d5796d2SLennert Buytenhek 15288d5796d2SLennert Buytenhek config VMSPLIT_3G 15298d5796d2SLennert Buytenhek bool "3G/1G user/kernel split" 15308d5796d2SLennert Buytenhek config VMSPLIT_2G 15318d5796d2SLennert Buytenhek bool "2G/2G user/kernel split" 15328d5796d2SLennert Buytenhek config VMSPLIT_1G 15338d5796d2SLennert Buytenhek bool "1G/3G user/kernel split" 15348d5796d2SLennert Buytenhekendchoice 15358d5796d2SLennert Buytenhek 15368d5796d2SLennert Buytenhekconfig PAGE_OFFSET 15378d5796d2SLennert Buytenhek hex 1538006fa259SRussell King default PHYS_OFFSET if !MMU 15398d5796d2SLennert Buytenhek default 0x40000000 if VMSPLIT_1G 15408d5796d2SLennert Buytenhek default 0x80000000 if VMSPLIT_2G 15418d5796d2SLennert Buytenhek default 0xC0000000 15428d5796d2SLennert Buytenhek 15431da177e4SLinus Torvaldsconfig NR_CPUS 15441da177e4SLinus Torvalds int "Maximum number of CPUs (2-32)" 15451da177e4SLinus Torvalds range 2 32 15461da177e4SLinus Torvalds depends on SMP 15471da177e4SLinus Torvalds default "4" 15481da177e4SLinus Torvalds 1549a054a811SRussell Kingconfig HOTPLUG_CPU 155000b7dedeSRussell King bool "Support for hot-pluggable CPUs" 155140b31360SStephen Rothwell depends on SMP 1552a054a811SRussell King help 1553a054a811SRussell King Say Y here to experiment with turning CPUs off and on. CPUs 1554a054a811SRussell King can be controlled through /sys/devices/system/cpu. 1555a054a811SRussell King 15562bdd424fSWill Deaconconfig ARM_PSCI 15572bdd424fSWill Deacon bool "Support for the ARM Power State Coordination Interface (PSCI)" 15582bdd424fSWill Deacon depends on CPU_V7 15592bdd424fSWill Deacon help 15602bdd424fSWill Deacon Say Y here if you want Linux to communicate with system firmware 15612bdd424fSWill Deacon implementing the PSCI specification for CPU-centric power 15622bdd424fSWill Deacon management operations described in ARM document number ARM DEN 15632bdd424fSWill Deacon 0022A ("Power State Coordination Interface System Software on 15642bdd424fSWill Deacon ARM processors"). 15652bdd424fSWill Deacon 15662a6ad871SMaxime Ripard# The GPIO number here must be sorted by descending number. In case of 15672a6ad871SMaxime Ripard# a multiplatform kernel, we just want the highest value required by the 15682a6ad871SMaxime Ripard# selected platforms. 156944986ab0SPeter De Schrijver (NVIDIA)config ARCH_NR_GPIO 157044986ab0SPeter De Schrijver (NVIDIA) int 15713dea19e8SPeter De Schrijver (NVIDIA) default 1024 if ARCH_SHMOBILE || ARCH_TEGRA 157241c3548eSLinus Walleij default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX 1573eb171a99SBoris BREZILLON default 416 if ARCH_SUNXI 157406b851e5SOlof Johansson default 392 if ARCH_U8500 157501bb914cSTony Prisk default 352 if ARCH_VT8500 15762a6ad871SMaxime Ripard default 264 if MACH_H4700 157744986ab0SPeter De Schrijver (NVIDIA) default 0 157844986ab0SPeter De Schrijver (NVIDIA) help 157944986ab0SPeter De Schrijver (NVIDIA) Maximum number of GPIOs in the system. 158044986ab0SPeter De Schrijver (NVIDIA) 158144986ab0SPeter De Schrijver (NVIDIA) If unsure, leave the default value. 158244986ab0SPeter De Schrijver (NVIDIA) 1583d45a398fSUwe Kleine-Königsource kernel/Kconfig.preempt 15841da177e4SLinus Torvalds 1585c9218b16SRussell Kingconfig HZ_FIXED 1586f8065813SRussell King int 1587b130d5c2SKukjin Kim default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \ 1588a73ddc61SKukjin Kim ARCH_S5PV210 || ARCH_EXYNOS4 15895248c657SDavid Brownell default AT91_TIMER_HZ if ARCH_AT91 1590bf98c1eaSLaurent Pinchart default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY 159147d84682SRussell King default 0 1592c9218b16SRussell King 1593c9218b16SRussell Kingchoice 159447d84682SRussell King depends on HZ_FIXED = 0 1595c9218b16SRussell King prompt "Timer frequency" 1596c9218b16SRussell King 1597c9218b16SRussell Kingconfig HZ_100 1598c9218b16SRussell King bool "100 Hz" 1599c9218b16SRussell King 1600c9218b16SRussell Kingconfig HZ_200 1601c9218b16SRussell King bool "200 Hz" 1602c9218b16SRussell King 1603c9218b16SRussell Kingconfig HZ_250 1604c9218b16SRussell King bool "250 Hz" 1605c9218b16SRussell King 1606c9218b16SRussell Kingconfig HZ_300 1607c9218b16SRussell King bool "300 Hz" 1608c9218b16SRussell King 1609c9218b16SRussell Kingconfig HZ_500 1610c9218b16SRussell King bool "500 Hz" 1611c9218b16SRussell King 1612c9218b16SRussell Kingconfig HZ_1000 1613c9218b16SRussell King bool "1000 Hz" 1614c9218b16SRussell King 1615c9218b16SRussell Kingendchoice 1616c9218b16SRussell King 1617c9218b16SRussell Kingconfig HZ 1618c9218b16SRussell King int 161947d84682SRussell King default HZ_FIXED if HZ_FIXED != 0 1620c9218b16SRussell King default 100 if HZ_100 1621c9218b16SRussell King default 200 if HZ_200 1622c9218b16SRussell King default 250 if HZ_250 1623c9218b16SRussell King default 300 if HZ_300 1624c9218b16SRussell King default 500 if HZ_500 1625c9218b16SRussell King default 1000 1626c9218b16SRussell King 1627c9218b16SRussell Kingconfig SCHED_HRTICK 1628c9218b16SRussell King def_bool HIGH_RES_TIMERS 1629f8065813SRussell King 163016c79651SCatalin Marinasconfig THUMB2_KERNEL 1631bc7dea00SUwe Kleine-König bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY 16324477ca45SUwe Kleine-König depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K 1633bc7dea00SUwe Kleine-König default y if CPU_THUMBONLY 163416c79651SCatalin Marinas select AEABI 163516c79651SCatalin Marinas select ARM_ASM_UNIFIED 163689bace65SArnd Bergmann select ARM_UNWIND 163716c79651SCatalin Marinas help 163816c79651SCatalin Marinas By enabling this option, the kernel will be compiled in 163916c79651SCatalin Marinas Thumb-2 mode. A compiler/assembler that understand the unified 164016c79651SCatalin Marinas ARM-Thumb syntax is needed. 164116c79651SCatalin Marinas 164216c79651SCatalin Marinas If unsure, say N. 164316c79651SCatalin Marinas 16446f685c5cSDave Martinconfig THUMB2_AVOID_R_ARM_THM_JUMP11 16456f685c5cSDave Martin bool "Work around buggy Thumb-2 short branch relocations in gas" 16466f685c5cSDave Martin depends on THUMB2_KERNEL && MODULES 16476f685c5cSDave Martin default y 16486f685c5cSDave Martin help 16496f685c5cSDave Martin Various binutils versions can resolve Thumb-2 branches to 16506f685c5cSDave Martin locally-defined, preemptible global symbols as short-range "b.n" 16516f685c5cSDave Martin branch instructions. 16526f685c5cSDave Martin 16536f685c5cSDave Martin This is a problem, because there's no guarantee the final 16546f685c5cSDave Martin destination of the symbol, or any candidate locations for a 16556f685c5cSDave Martin trampoline, are within range of the branch. For this reason, the 16566f685c5cSDave Martin kernel does not support fixing up the R_ARM_THM_JUMP11 (102) 16576f685c5cSDave Martin relocation in modules at all, and it makes little sense to add 16586f685c5cSDave Martin support. 16596f685c5cSDave Martin 16606f685c5cSDave Martin The symptom is that the kernel fails with an "unsupported 16616f685c5cSDave Martin relocation" error when loading some modules. 16626f685c5cSDave Martin 16636f685c5cSDave Martin Until fixed tools are available, passing 16646f685c5cSDave Martin -fno-optimize-sibling-calls to gcc should prevent gcc generating 16656f685c5cSDave Martin code which hits this problem, at the cost of a bit of extra runtime 16666f685c5cSDave Martin stack usage in some cases. 16676f685c5cSDave Martin 16686f685c5cSDave Martin The problem is described in more detail at: 16696f685c5cSDave Martin https://bugs.launchpad.net/binutils-linaro/+bug/725126 16706f685c5cSDave Martin 16716f685c5cSDave Martin Only Thumb-2 kernels are affected. 16726f685c5cSDave Martin 16736f685c5cSDave Martin Unless you are sure your tools don't have this problem, say Y. 16746f685c5cSDave Martin 16750becb088SCatalin Marinasconfig ARM_ASM_UNIFIED 16760becb088SCatalin Marinas bool 16770becb088SCatalin Marinas 1678704bdda0SNicolas Pitreconfig AEABI 1679704bdda0SNicolas Pitre bool "Use the ARM EABI to compile the kernel" 1680704bdda0SNicolas Pitre help 1681704bdda0SNicolas Pitre This option allows for the kernel to be compiled using the latest 1682704bdda0SNicolas Pitre ARM ABI (aka EABI). This is only useful if you are using a user 1683704bdda0SNicolas Pitre space environment that is also compiled with EABI. 1684704bdda0SNicolas Pitre 1685704bdda0SNicolas Pitre Since there are major incompatibilities between the legacy ABI and 1686704bdda0SNicolas Pitre EABI, especially with regard to structure member alignment, this 1687704bdda0SNicolas Pitre option also changes the kernel syscall calling convention to 1688704bdda0SNicolas Pitre disambiguate both ABIs and allow for backward compatibility support 1689704bdda0SNicolas Pitre (selected with CONFIG_OABI_COMPAT). 1690704bdda0SNicolas Pitre 1691704bdda0SNicolas Pitre To use this you need GCC version 4.0.0 or later. 1692704bdda0SNicolas Pitre 16936c90c872SNicolas Pitreconfig OABI_COMPAT 1694a73a3ff1SRussell King bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 1695d6f94fa0SKees Cook depends on AEABI && !THUMB2_KERNEL 16966c90c872SNicolas Pitre help 16976c90c872SNicolas Pitre This option preserves the old syscall interface along with the 16986c90c872SNicolas Pitre new (ARM EABI) one. It also provides a compatibility layer to 16996c90c872SNicolas Pitre intercept syscalls that have structure arguments which layout 17006c90c872SNicolas Pitre in memory differs between the legacy ABI and the new ARM EABI 17016c90c872SNicolas Pitre (only for non "thumb" binaries). This option adds a tiny 17026c90c872SNicolas Pitre overhead to all syscalls and produces a slightly larger kernel. 170391702175SKees Cook 170491702175SKees Cook The seccomp filter system will not be available when this is 170591702175SKees Cook selected, since there is no way yet to sensibly distinguish 170691702175SKees Cook between calling conventions during filtering. 170791702175SKees Cook 17086c90c872SNicolas Pitre If you know you'll be using only pure EABI user space then you 17096c90c872SNicolas Pitre can say N here. If this option is not selected and you attempt 17106c90c872SNicolas Pitre to execute a legacy ABI binary then the result will be 17116c90c872SNicolas Pitre UNPREDICTABLE (in fact it can be predicted that it won't work 1712b02f8467SKees Cook at all). If in doubt say N. 17136c90c872SNicolas Pitre 1714eb33575cSMel Gormanconfig ARCH_HAS_HOLES_MEMORYMODEL 1715e80d6a24SMel Gorman bool 1716e80d6a24SMel Gorman 171705944d74SRussell Kingconfig ARCH_SPARSEMEM_ENABLE 171805944d74SRussell King bool 171905944d74SRussell King 172007a2f737SRussell Kingconfig ARCH_SPARSEMEM_DEFAULT 172107a2f737SRussell King def_bool ARCH_SPARSEMEM_ENABLE 172207a2f737SRussell King 172305944d74SRussell Kingconfig ARCH_SELECT_MEMORY_MODEL 1724be370302SRussell King def_bool ARCH_SPARSEMEM_ENABLE 1725c80d79d7SYasunori Goto 17267b7bf499SWill Deaconconfig HAVE_ARCH_PFN_VALID 17277b7bf499SWill Deacon def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 17287b7bf499SWill Deacon 1729053a96caSNicolas Pitreconfig HIGHMEM 1730e8db89a2SRussell King bool "High Memory Support" 1731e8db89a2SRussell King depends on MMU 1732053a96caSNicolas Pitre help 1733053a96caSNicolas Pitre The address space of ARM processors is only 4 Gigabytes large 1734053a96caSNicolas Pitre and it has to accommodate user address space, kernel address 1735053a96caSNicolas Pitre space as well as some memory mapped IO. That means that, if you 1736053a96caSNicolas Pitre have a large amount of physical memory and/or IO, not all of the 1737053a96caSNicolas Pitre memory can be "permanently mapped" by the kernel. The physical 1738053a96caSNicolas Pitre memory that is not permanently mapped is called "high memory". 1739053a96caSNicolas Pitre 1740053a96caSNicolas Pitre Depending on the selected kernel/user memory split, minimum 1741053a96caSNicolas Pitre vmalloc space and actual amount of RAM, you may not need this 1742053a96caSNicolas Pitre option which should result in a slightly faster kernel. 1743053a96caSNicolas Pitre 1744053a96caSNicolas Pitre If unsure, say n. 1745053a96caSNicolas Pitre 174665cec8e3SRussell Kingconfig HIGHPTE 174765cec8e3SRussell King bool "Allocate 2nd-level pagetables from highmem" 174865cec8e3SRussell King depends on HIGHMEM 174965cec8e3SRussell King 17501b8873a0SJamie Ilesconfig HW_PERF_EVENTS 17511b8873a0SJamie Iles bool "Enable hardware performance counter support for perf events" 1752f0d1bc47SWill Deacon depends on PERF_EVENTS 17531b8873a0SJamie Iles default y 17541b8873a0SJamie Iles help 17551b8873a0SJamie Iles Enable hardware performance counter support for perf events. If 17561b8873a0SJamie Iles disabled, perf events will use software events only. 17571b8873a0SJamie Iles 17581355e2a6SCatalin Marinasconfig SYS_SUPPORTS_HUGETLBFS 17591355e2a6SCatalin Marinas def_bool y 17601355e2a6SCatalin Marinas depends on ARM_LPAE 17611355e2a6SCatalin Marinas 17628d962507SCatalin Marinasconfig HAVE_ARCH_TRANSPARENT_HUGEPAGE 17638d962507SCatalin Marinas def_bool y 17648d962507SCatalin Marinas depends on ARM_LPAE 17658d962507SCatalin Marinas 17664bfab203SSteven Capperconfig ARCH_WANT_GENERAL_HUGETLB 17674bfab203SSteven Capper def_bool y 17684bfab203SSteven Capper 17693f22ab27SDave Hansensource "mm/Kconfig" 17703f22ab27SDave Hansen 1771c1b2d970SMagnus Dammconfig FORCE_MAX_ZONEORDER 1772bf98c1eaSLaurent Pinchart int "Maximum zone order" if ARCH_SHMOBILE_LEGACY 1773bf98c1eaSLaurent Pinchart range 11 64 if ARCH_SHMOBILE_LEGACY 1774898f08e1SYegor Yefremov default "12" if SOC_AM33XX 17756d85e2b0SUwe Kleine-König default "9" if SA1111 || ARCH_EFM32 1776c1b2d970SMagnus Damm default "11" 1777c1b2d970SMagnus Damm help 1778c1b2d970SMagnus Damm The kernel memory allocator divides physically contiguous memory 1779c1b2d970SMagnus Damm blocks into "zones", where each zone is a power of two number of 1780c1b2d970SMagnus Damm pages. This option selects the largest power of two that the kernel 1781c1b2d970SMagnus Damm keeps in the memory allocator. If you need to allocate very large 1782c1b2d970SMagnus Damm blocks of physically contiguous memory, then you may need to 1783c1b2d970SMagnus Damm increase this value. 1784c1b2d970SMagnus Damm 1785c1b2d970SMagnus Damm This config option is actually maximum order plus one. For example, 1786c1b2d970SMagnus Damm a value of 11 means that the largest free memory block is 2^10 pages. 1787c1b2d970SMagnus Damm 17881da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP 17891da177e4SLinus Torvalds bool 1790f12d0d7cSHyok S. Choi depends on CPU_CP15_MMU 17911da177e4SLinus Torvalds default y if !ARCH_EBSA110 1792e119bfffSRussell King select HAVE_PROC_CPU if PROC_FS 17931da177e4SLinus Torvalds help 17941da177e4SLinus Torvalds ARM processors cannot fetch/store information which is not 17951da177e4SLinus Torvalds naturally aligned on the bus, i.e., a 4 byte fetch must start at an 17961da177e4SLinus Torvalds address divisible by 4. On 32-bit ARM processors, these non-aligned 17971da177e4SLinus Torvalds fetch/store instructions will be emulated in software if you say 17981da177e4SLinus Torvalds here, which has a severe performance impact. This is necessary for 17991da177e4SLinus Torvalds correct operation of some network protocols. With an IP-only 18001da177e4SLinus Torvalds configuration it is safe to say N, otherwise say Y. 18011da177e4SLinus Torvalds 180239ec58f3SLennert Buytenhekconfig UACCESS_WITH_MEMCPY 180338ef2ad5SLinus Walleij bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()" 180438ef2ad5SLinus Walleij depends on MMU 180539ec58f3SLennert Buytenhek default y if CPU_FEROCEON 180639ec58f3SLennert Buytenhek help 180739ec58f3SLennert Buytenhek Implement faster copy_to_user and clear_user methods for CPU 180839ec58f3SLennert Buytenhek cores where a 8-word STM instruction give significantly higher 180939ec58f3SLennert Buytenhek memory write throughput than a sequence of individual 32bit stores. 181039ec58f3SLennert Buytenhek 181139ec58f3SLennert Buytenhek A possible side effect is a slight increase in scheduling latency 181239ec58f3SLennert Buytenhek between threads sharing the same address space if they invoke 181339ec58f3SLennert Buytenhek such copy operations with large buffers. 181439ec58f3SLennert Buytenhek 181539ec58f3SLennert Buytenhek However, if the CPU data cache is using a write-allocate mode, 181639ec58f3SLennert Buytenhek this option is unlikely to provide any performance gain. 181739ec58f3SLennert Buytenhek 181870c70d97SNicolas Pitreconfig SECCOMP 181970c70d97SNicolas Pitre bool 182070c70d97SNicolas Pitre prompt "Enable seccomp to safely compute untrusted bytecode" 182170c70d97SNicolas Pitre ---help--- 182270c70d97SNicolas Pitre This kernel feature is useful for number crunching applications 182370c70d97SNicolas Pitre that may need to compute untrusted bytecode during their 182470c70d97SNicolas Pitre execution. By using pipes or other transports made available to 182570c70d97SNicolas Pitre the process as file descriptors supporting the read/write 182670c70d97SNicolas Pitre syscalls, it's possible to isolate those applications in 182770c70d97SNicolas Pitre their own address space using seccomp. Once seccomp is 182870c70d97SNicolas Pitre enabled via prctl(PR_SET_SECCOMP), it cannot be disabled 182970c70d97SNicolas Pitre and the task is only allowed to execute a few safe syscalls 183070c70d97SNicolas Pitre defined by each seccomp mode. 183170c70d97SNicolas Pitre 183206e6295bSStefano Stabelliniconfig SWIOTLB 183306e6295bSStefano Stabellini def_bool y 183406e6295bSStefano Stabellini 183506e6295bSStefano Stabelliniconfig IOMMU_HELPER 183606e6295bSStefano Stabellini def_bool SWIOTLB 183706e6295bSStefano Stabellini 1838eff8d644SStefano Stabelliniconfig XEN_DOM0 1839eff8d644SStefano Stabellini def_bool y 1840eff8d644SStefano Stabellini depends on XEN 1841eff8d644SStefano Stabellini 1842eff8d644SStefano Stabelliniconfig XEN 1843eff8d644SStefano Stabellini bool "Xen guest support on ARM (EXPERIMENTAL)" 184485323a99SIan Campbell depends on ARM && AEABI && OF 1845f880b67dSArnd Bergmann depends on CPU_V7 && !CPU_V6 184685323a99SIan Campbell depends on !GENERIC_ATOMIC64 18477693deccSUwe Kleine-König depends on MMU 184851aaf81fSRussell King select ARCH_DMA_ADDR_T_64BIT 184917b7ab80SStefano Stabellini select ARM_PSCI 185083862ccfSStefano Stabellini select SWIOTLB_XEN 1851eff8d644SStefano Stabellini help 1852eff8d644SStefano Stabellini Say Y if you want to run Linux in a Virtual Machine on Xen on ARM. 1853eff8d644SStefano Stabellini 18541da177e4SLinus Torvaldsendmenu 18551da177e4SLinus Torvalds 18561da177e4SLinus Torvaldsmenu "Boot options" 18571da177e4SLinus Torvalds 18589eb8f674SGrant Likelyconfig USE_OF 18599eb8f674SGrant Likely bool "Flattened Device Tree support" 1860b1b3f49cSRussell King select IRQ_DOMAIN 18619eb8f674SGrant Likely select OF 18629eb8f674SGrant Likely select OF_EARLY_FLATTREE 1863bcedb5f9SMarek Szyprowski select OF_RESERVED_MEM 18649eb8f674SGrant Likely help 18659eb8f674SGrant Likely Include support for flattened device tree machine descriptions. 18669eb8f674SGrant Likely 1867bd51e2f5SNicolas Pitreconfig ATAGS 1868bd51e2f5SNicolas Pitre bool "Support for the traditional ATAGS boot data passing" if USE_OF 1869bd51e2f5SNicolas Pitre default y 1870bd51e2f5SNicolas Pitre help 1871bd51e2f5SNicolas Pitre This is the traditional way of passing data to the kernel at boot 1872bd51e2f5SNicolas Pitre time. If you are solely relying on the flattened device tree (or 1873bd51e2f5SNicolas Pitre the ARM_ATAG_DTB_COMPAT option) then you may unselect this option 1874bd51e2f5SNicolas Pitre to remove ATAGS support from your kernel binary. If unsure, 1875bd51e2f5SNicolas Pitre leave this to y. 1876bd51e2f5SNicolas Pitre 1877bd51e2f5SNicolas Pitreconfig DEPRECATED_PARAM_STRUCT 1878bd51e2f5SNicolas Pitre bool "Provide old way to pass kernel parameters" 1879bd51e2f5SNicolas Pitre depends on ATAGS 1880bd51e2f5SNicolas Pitre help 1881bd51e2f5SNicolas Pitre This was deprecated in 2001 and announced to live on for 5 years. 1882bd51e2f5SNicolas Pitre Some old boot loaders still use this way. 1883bd51e2f5SNicolas Pitre 18841da177e4SLinus Torvalds# Compressed boot loader in ROM. Yes, we really want to ask about 18851da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files. 18861da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT 18871da177e4SLinus Torvalds hex "Compressed ROM boot loader base address" 18881da177e4SLinus Torvalds default "0" 18891da177e4SLinus Torvalds help 18901da177e4SLinus Torvalds The physical address at which the ROM-able zImage is to be 18911da177e4SLinus Torvalds placed in the target. Platforms which normally make use of 18921da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 18931da177e4SLinus Torvalds value in their defconfig file. 18941da177e4SLinus Torvalds 18951da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 18961da177e4SLinus Torvalds 18971da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS 18981da177e4SLinus Torvalds hex "Compressed ROM boot loader BSS address" 18991da177e4SLinus Torvalds default "0" 19001da177e4SLinus Torvalds help 1901f8c440b2SDan Fandrich The base address of an area of read/write memory in the target 1902f8c440b2SDan Fandrich for the ROM-able zImage which must be available while the 1903f8c440b2SDan Fandrich decompressor is running. It must be large enough to hold the 1904f8c440b2SDan Fandrich entire decompressed kernel plus an additional 128 KiB. 1905f8c440b2SDan Fandrich Platforms which normally make use of ROM-able zImage formats 1906f8c440b2SDan Fandrich normally set this to a suitable value in their defconfig file. 19071da177e4SLinus Torvalds 19081da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 19091da177e4SLinus Torvalds 19101da177e4SLinus Torvaldsconfig ZBOOT_ROM 19111da177e4SLinus Torvalds bool "Compressed boot loader in ROM/flash" 19121da177e4SLinus Torvalds depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 191310968131SRussell King depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR 19141da177e4SLinus Torvalds help 19151da177e4SLinus Torvalds Say Y here if you intend to execute your compressed kernel image 19161da177e4SLinus Torvalds (zImage) directly from ROM or flash. If unsure, say N. 19171da177e4SLinus Torvalds 1918090ab3ffSSimon Hormanchoice 1919090ab3ffSSimon Horman prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)" 1920d6f94fa0SKees Cook depends on ZBOOT_ROM && ARCH_SH7372 1921090ab3ffSSimon Horman default ZBOOT_ROM_NONE 1922090ab3ffSSimon Horman help 1923090ab3ffSSimon Horman Include experimental SD/MMC loading code in the ROM-able zImage. 192459bf8964SMasanari Iida With this enabled it is possible to write the ROM-able zImage 1925090ab3ffSSimon Horman kernel image to an MMC or SD card and boot the kernel straight 1926090ab3ffSSimon Horman from the reset vector. At reset the processor Mask ROM will load 192759bf8964SMasanari Iida the first part of the ROM-able zImage which in turn loads the 1928090ab3ffSSimon Horman rest the kernel image to RAM. 1929090ab3ffSSimon Horman 1930090ab3ffSSimon Hormanconfig ZBOOT_ROM_NONE 1931090ab3ffSSimon Horman bool "No SD/MMC loader in zImage (EXPERIMENTAL)" 1932090ab3ffSSimon Horman help 1933090ab3ffSSimon Horman Do not load image from SD or MMC 1934090ab3ffSSimon Horman 1935f45b1149SSimon Hormanconfig ZBOOT_ROM_MMCIF 1936f45b1149SSimon Horman bool "Include MMCIF loader in zImage (EXPERIMENTAL)" 1937f45b1149SSimon Horman help 1938090ab3ffSSimon Horman Load image from MMCIF hardware block. 1939090ab3ffSSimon Horman 1940090ab3ffSSimon Hormanconfig ZBOOT_ROM_SH_MOBILE_SDHI 1941090ab3ffSSimon Horman bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)" 1942090ab3ffSSimon Horman help 1943090ab3ffSSimon Horman Load image from SDHI hardware block 1944090ab3ffSSimon Horman 1945090ab3ffSSimon Hormanendchoice 1946f45b1149SSimon Horman 1947e2a6a3aaSJohn Bonesioconfig ARM_APPENDED_DTB 1948e2a6a3aaSJohn Bonesio bool "Use appended device tree blob to zImage (EXPERIMENTAL)" 194910968131SRussell King depends on OF 1950e2a6a3aaSJohn Bonesio help 1951e2a6a3aaSJohn Bonesio With this option, the boot code will look for a device tree binary 1952e2a6a3aaSJohn Bonesio (DTB) appended to zImage 1953e2a6a3aaSJohn Bonesio (e.g. cat zImage <filename>.dtb > zImage_w_dtb). 1954e2a6a3aaSJohn Bonesio 1955e2a6a3aaSJohn Bonesio This is meant as a backward compatibility convenience for those 1956e2a6a3aaSJohn Bonesio systems with a bootloader that can't be upgraded to accommodate 1957e2a6a3aaSJohn Bonesio the documented boot protocol using a device tree. 1958e2a6a3aaSJohn Bonesio 1959e2a6a3aaSJohn Bonesio Beware that there is very little in terms of protection against 1960e2a6a3aaSJohn Bonesio this option being confused by leftover garbage in memory that might 1961e2a6a3aaSJohn Bonesio look like a DTB header after a reboot if no actual DTB is appended 1962e2a6a3aaSJohn Bonesio to zImage. Do not leave this option active in a production kernel 1963e2a6a3aaSJohn Bonesio if you don't intend to always append a DTB. Proper passing of the 1964e2a6a3aaSJohn Bonesio location into r2 of a bootloader provided DTB is always preferable 1965e2a6a3aaSJohn Bonesio to this option. 1966e2a6a3aaSJohn Bonesio 1967b90b9a38SNicolas Pitreconfig ARM_ATAG_DTB_COMPAT 1968b90b9a38SNicolas Pitre bool "Supplement the appended DTB with traditional ATAG information" 1969b90b9a38SNicolas Pitre depends on ARM_APPENDED_DTB 1970b90b9a38SNicolas Pitre help 1971b90b9a38SNicolas Pitre Some old bootloaders can't be updated to a DTB capable one, yet 1972b90b9a38SNicolas Pitre they provide ATAGs with memory configuration, the ramdisk address, 1973b90b9a38SNicolas Pitre the kernel cmdline string, etc. Such information is dynamically 1974b90b9a38SNicolas Pitre provided by the bootloader and can't always be stored in a static 1975b90b9a38SNicolas Pitre DTB. To allow a device tree enabled kernel to be used with such 1976b90b9a38SNicolas Pitre bootloaders, this option allows zImage to extract the information 1977b90b9a38SNicolas Pitre from the ATAG list and store it at run time into the appended DTB. 1978b90b9a38SNicolas Pitre 1979d0f34a11SGenoud Richardchoice 1980d0f34a11SGenoud Richard prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT 1981d0f34a11SGenoud Richard default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER 1982d0f34a11SGenoud Richard 1983d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER 1984d0f34a11SGenoud Richard bool "Use bootloader kernel arguments if available" 1985d0f34a11SGenoud Richard help 1986d0f34a11SGenoud Richard Uses the command-line options passed by the boot loader instead of 1987d0f34a11SGenoud Richard the device tree bootargs property. If the boot loader doesn't provide 1988d0f34a11SGenoud Richard any, the device tree bootargs property will be used. 1989d0f34a11SGenoud Richard 1990d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND 1991d0f34a11SGenoud Richard bool "Extend with bootloader kernel arguments" 1992d0f34a11SGenoud Richard help 1993d0f34a11SGenoud Richard The command-line arguments provided by the boot loader will be 1994d0f34a11SGenoud Richard appended to the the device tree bootargs property. 1995d0f34a11SGenoud Richard 1996d0f34a11SGenoud Richardendchoice 1997d0f34a11SGenoud Richard 19981da177e4SLinus Torvaldsconfig CMDLINE 19991da177e4SLinus Torvalds string "Default kernel command string" 20001da177e4SLinus Torvalds default "" 20011da177e4SLinus Torvalds help 20021da177e4SLinus Torvalds On some architectures (EBSA110 and CATS), there is currently no way 20031da177e4SLinus Torvalds for the boot loader to pass arguments to the kernel. For these 20041da177e4SLinus Torvalds architectures, you should supply some command-line options at build 20051da177e4SLinus Torvalds time by entering them here. As a minimum, you should specify the 20061da177e4SLinus Torvalds memory size and the root device (e.g., mem=64M root=/dev/nfs). 20071da177e4SLinus Torvalds 20084394c124SVictor Boiviechoice 20094394c124SVictor Boivie prompt "Kernel command line type" if CMDLINE != "" 20104394c124SVictor Boivie default CMDLINE_FROM_BOOTLOADER 2011bd51e2f5SNicolas Pitre depends on ATAGS 20124394c124SVictor Boivie 20134394c124SVictor Boivieconfig CMDLINE_FROM_BOOTLOADER 20144394c124SVictor Boivie bool "Use bootloader kernel arguments if available" 20154394c124SVictor Boivie help 20164394c124SVictor Boivie Uses the command-line options passed by the boot loader. If 20174394c124SVictor Boivie the boot loader doesn't provide any, the default kernel command 20184394c124SVictor Boivie string provided in CMDLINE will be used. 20194394c124SVictor Boivie 20204394c124SVictor Boivieconfig CMDLINE_EXTEND 20214394c124SVictor Boivie bool "Extend bootloader kernel arguments" 20224394c124SVictor Boivie help 20234394c124SVictor Boivie The command-line arguments provided by the boot loader will be 20244394c124SVictor Boivie appended to the default kernel command string. 20254394c124SVictor Boivie 202692d2040dSAlexander Hollerconfig CMDLINE_FORCE 202792d2040dSAlexander Holler bool "Always use the default kernel command string" 202892d2040dSAlexander Holler help 202992d2040dSAlexander Holler Always use the default kernel command string, even if the boot 203092d2040dSAlexander Holler loader passes other arguments to the kernel. 203192d2040dSAlexander Holler This is useful if you cannot or don't want to change the 203292d2040dSAlexander Holler command-line options your boot loader passes to the kernel. 20334394c124SVictor Boivieendchoice 203492d2040dSAlexander Holler 20351da177e4SLinus Torvaldsconfig XIP_KERNEL 20361da177e4SLinus Torvalds bool "Kernel Execute-In-Place from ROM" 203710968131SRussell King depends on !ARM_LPAE && !ARCH_MULTIPLATFORM 20381da177e4SLinus Torvalds help 20391da177e4SLinus Torvalds Execute-In-Place allows the kernel to run from non-volatile storage 20401da177e4SLinus Torvalds directly addressable by the CPU, such as NOR flash. This saves RAM 20411da177e4SLinus Torvalds space since the text section of the kernel is not loaded from flash 20421da177e4SLinus Torvalds to RAM. Read-write sections, such as the data section and stack, 20431da177e4SLinus Torvalds are still copied to RAM. The XIP kernel is not compressed since 20441da177e4SLinus Torvalds it has to run directly from flash, so it will take more space to 20451da177e4SLinus Torvalds store it. The flash address used to link the kernel object files, 20461da177e4SLinus Torvalds and for storing it, is configuration dependent. Therefore, if you 20471da177e4SLinus Torvalds say Y here, you must know the proper physical address where to 20481da177e4SLinus Torvalds store the kernel image depending on your own flash memory usage. 20491da177e4SLinus Torvalds 20501da177e4SLinus Torvalds Also note that the make target becomes "make xipImage" rather than 20511da177e4SLinus Torvalds "make zImage" or "make Image". The final kernel binary to put in 20521da177e4SLinus Torvalds ROM memory will be arch/arm/boot/xipImage. 20531da177e4SLinus Torvalds 20541da177e4SLinus Torvalds If unsure, say N. 20551da177e4SLinus Torvalds 20561da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR 20571da177e4SLinus Torvalds hex "XIP Kernel Physical Location" 20581da177e4SLinus Torvalds depends on XIP_KERNEL 20591da177e4SLinus Torvalds default "0x00080000" 20601da177e4SLinus Torvalds help 20611da177e4SLinus Torvalds This is the physical address in your flash memory the kernel will 20621da177e4SLinus Torvalds be linked for and stored to. This address is dependent on your 20631da177e4SLinus Torvalds own flash usage. 20641da177e4SLinus Torvalds 2065c587e4a6SRichard Purdieconfig KEXEC 2066c587e4a6SRichard Purdie bool "Kexec system call (EXPERIMENTAL)" 206719ab428fSStephen Warren depends on (!SMP || PM_SLEEP_SMP) 2068*12db5562SVivek Goyal select CRYPTO 2069*12db5562SVivek Goyal select CRYPTO_SHA256 2070c587e4a6SRichard Purdie help 2071c587e4a6SRichard Purdie kexec is a system call that implements the ability to shutdown your 2072c587e4a6SRichard Purdie current kernel, and to start another kernel. It is like a reboot 207301dd2fbfSMatt LaPlante but it is independent of the system firmware. And like a reboot 2074c587e4a6SRichard Purdie you can start any kernel with it, not just Linux. 2075c587e4a6SRichard Purdie 2076c587e4a6SRichard Purdie It is an ongoing process to be certain the hardware in a machine 2077c587e4a6SRichard Purdie is properly shutdown, so do not be surprised if this code does not 2078bf220695SGeert Uytterhoeven initially work for you. 2079c587e4a6SRichard Purdie 20804cd9d6f7SRichard Purdieconfig ATAGS_PROC 20814cd9d6f7SRichard Purdie bool "Export atags in procfs" 2082bd51e2f5SNicolas Pitre depends on ATAGS && KEXEC 2083b98d7291SUli Luckas default y 20844cd9d6f7SRichard Purdie help 20854cd9d6f7SRichard Purdie Should the atags used to boot the kernel be exported in an "atags" 20864cd9d6f7SRichard Purdie file in procfs. Useful with kexec. 20874cd9d6f7SRichard Purdie 2088cb5d39b3SMika Westerbergconfig CRASH_DUMP 2089cb5d39b3SMika Westerberg bool "Build kdump crash kernel (EXPERIMENTAL)" 2090cb5d39b3SMika Westerberg help 2091cb5d39b3SMika Westerberg Generate crash dump after being started by kexec. This should 2092cb5d39b3SMika Westerberg be normally only set in special crash dump kernels which are 2093cb5d39b3SMika Westerberg loaded in the main kernel with kexec-tools into a specially 2094cb5d39b3SMika Westerberg reserved region and then later executed after a crash by 2095cb5d39b3SMika Westerberg kdump/kexec. The crash dump kernel must be compiled to a 2096cb5d39b3SMika Westerberg memory address not used by the main kernel 2097cb5d39b3SMika Westerberg 2098cb5d39b3SMika Westerberg For more details see Documentation/kdump/kdump.txt 2099cb5d39b3SMika Westerberg 2100e69edc79SEric Miaoconfig AUTO_ZRELADDR 2101e69edc79SEric Miao bool "Auto calculation of the decompressed kernel image address" 2102e69edc79SEric Miao help 2103e69edc79SEric Miao ZRELADDR is the physical address where the decompressed kernel 2104e69edc79SEric Miao image will be placed. If AUTO_ZRELADDR is selected, the address 2105e69edc79SEric Miao will be determined at run-time by masking the current IP with 2106e69edc79SEric Miao 0xf8000000. This assumes the zImage being placed in the first 128MB 2107e69edc79SEric Miao from start of memory. 2108e69edc79SEric Miao 21091da177e4SLinus Torvaldsendmenu 21101da177e4SLinus Torvalds 2111ac9d7efcSRussell Kingmenu "CPU Power Management" 21121da177e4SLinus Torvalds 21131da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig" 21141da177e4SLinus Torvalds 2115ac9d7efcSRussell Kingsource "drivers/cpuidle/Kconfig" 2116ac9d7efcSRussell King 2117ac9d7efcSRussell Kingendmenu 2118ac9d7efcSRussell King 21191da177e4SLinus Torvaldsmenu "Floating point emulation" 21201da177e4SLinus Torvalds 21211da177e4SLinus Torvaldscomment "At least one emulation must be selected" 21221da177e4SLinus Torvalds 21231da177e4SLinus Torvaldsconfig FPE_NWFPE 21241da177e4SLinus Torvalds bool "NWFPE math emulation" 2125593c252aSDave Martin depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL 21261da177e4SLinus Torvalds ---help--- 21271da177e4SLinus Torvalds Say Y to include the NWFPE floating point emulator in the kernel. 21281da177e4SLinus Torvalds This is necessary to run most binaries. Linux does not currently 21291da177e4SLinus Torvalds support floating point hardware so you need to say Y here even if 21301da177e4SLinus Torvalds your machine has an FPA or floating point co-processor podule. 21311da177e4SLinus Torvalds 21321da177e4SLinus Torvalds You may say N here if you are going to load the Acorn FPEmulator 21331da177e4SLinus Torvalds early in the bootup. 21341da177e4SLinus Torvalds 21351da177e4SLinus Torvaldsconfig FPE_NWFPE_XP 21361da177e4SLinus Torvalds bool "Support extended precision" 2137bedf142bSLennert Buytenhek depends on FPE_NWFPE 21381da177e4SLinus Torvalds help 21391da177e4SLinus Torvalds Say Y to include 80-bit support in the kernel floating-point 21401da177e4SLinus Torvalds emulator. Otherwise, only 32 and 64-bit support is compiled in. 21411da177e4SLinus Torvalds Note that gcc does not generate 80-bit operations by default, 21421da177e4SLinus Torvalds so in most cases this option only enlarges the size of the 21431da177e4SLinus Torvalds floating point emulator without any good reason. 21441da177e4SLinus Torvalds 21451da177e4SLinus Torvalds You almost surely want to say N here. 21461da177e4SLinus Torvalds 21471da177e4SLinus Torvaldsconfig FPE_FASTFPE 21481da177e4SLinus Torvalds bool "FastFPE math emulation (EXPERIMENTAL)" 2149d6f94fa0SKees Cook depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 21501da177e4SLinus Torvalds ---help--- 21511da177e4SLinus Torvalds Say Y here to include the FAST floating point emulator in the kernel. 21521da177e4SLinus Torvalds This is an experimental much faster emulator which now also has full 21531da177e4SLinus Torvalds precision for the mantissa. It does not support any exceptions. 21541da177e4SLinus Torvalds It is very simple, and approximately 3-6 times faster than NWFPE. 21551da177e4SLinus Torvalds 21561da177e4SLinus Torvalds It should be sufficient for most programs. It may be not suitable 21571da177e4SLinus Torvalds for scientific calculations, but you have to check this for yourself. 21581da177e4SLinus Torvalds If you do not feel you need a faster FP emulation you should better 21591da177e4SLinus Torvalds choose NWFPE. 21601da177e4SLinus Torvalds 21611da177e4SLinus Torvaldsconfig VFP 21621da177e4SLinus Torvalds bool "VFP-format floating point maths" 2163e399b1a4SRussell King depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 21641da177e4SLinus Torvalds help 21651da177e4SLinus Torvalds Say Y to include VFP support code in the kernel. This is needed 21661da177e4SLinus Torvalds if your hardware includes a VFP unit. 21671da177e4SLinus Torvalds 21681da177e4SLinus Torvalds Please see <file:Documentation/arm/VFP/release-notes.txt> for 21691da177e4SLinus Torvalds release notes and additional status information. 21701da177e4SLinus Torvalds 21711da177e4SLinus Torvalds Say N if your target does not have VFP hardware. 21721da177e4SLinus Torvalds 217325ebee02SCatalin Marinasconfig VFPv3 217425ebee02SCatalin Marinas bool 217525ebee02SCatalin Marinas depends on VFP 217625ebee02SCatalin Marinas default y if CPU_V7 217725ebee02SCatalin Marinas 2178b5872db4SCatalin Marinasconfig NEON 2179b5872db4SCatalin Marinas bool "Advanced SIMD (NEON) Extension support" 2180b5872db4SCatalin Marinas depends on VFPv3 && CPU_V7 2181b5872db4SCatalin Marinas help 2182b5872db4SCatalin Marinas Say Y to include support code for NEON, the ARMv7 Advanced SIMD 2183b5872db4SCatalin Marinas Extension. 2184b5872db4SCatalin Marinas 218573c132c1SArd Biesheuvelconfig KERNEL_MODE_NEON 218673c132c1SArd Biesheuvel bool "Support for NEON in kernel mode" 2187c4a30c3bSRussell King depends on NEON && AEABI 218873c132c1SArd Biesheuvel help 218973c132c1SArd Biesheuvel Say Y to include support for NEON in kernel mode. 219073c132c1SArd Biesheuvel 21911da177e4SLinus Torvaldsendmenu 21921da177e4SLinus Torvalds 21931da177e4SLinus Torvaldsmenu "Userspace binary formats" 21941da177e4SLinus Torvalds 21951da177e4SLinus Torvaldssource "fs/Kconfig.binfmt" 21961da177e4SLinus Torvalds 21971da177e4SLinus Torvaldsconfig ARTHUR 21981da177e4SLinus Torvalds tristate "RISC OS personality" 2199704bdda0SNicolas Pitre depends on !AEABI 22001da177e4SLinus Torvalds help 22011da177e4SLinus Torvalds Say Y here to include the kernel code necessary if you want to run 22021da177e4SLinus Torvalds Acorn RISC OS/Arthur binaries under Linux. This code is still very 22031da177e4SLinus Torvalds experimental; if this sounds frightening, say N and sleep in peace. 22041da177e4SLinus Torvalds You can also say M here to compile this support as a module (which 22051da177e4SLinus Torvalds will be called arthur). 22061da177e4SLinus Torvalds 22071da177e4SLinus Torvaldsendmenu 22081da177e4SLinus Torvalds 22091da177e4SLinus Torvaldsmenu "Power management options" 22101da177e4SLinus Torvalds 2211eceab4acSRussell Kingsource "kernel/power/Kconfig" 22121da177e4SLinus Torvalds 2213f4cb5700SJohannes Bergconfig ARCH_SUSPEND_POSSIBLE 22144b1082caSStephen Warren depends on !ARCH_S5PC100 221519a0519dSEzequiel Garcia depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \ 2216f0d75153SUwe Kleine-König CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK 2217f4cb5700SJohannes Berg def_bool y 2218f4cb5700SJohannes Berg 221915e0d9e3SArnd Bergmannconfig ARM_CPU_SUSPEND 222015e0d9e3SArnd Bergmann def_bool PM_SLEEP 222115e0d9e3SArnd Bergmann 2222603fb42aSSebastian Capellaconfig ARCH_HIBERNATION_POSSIBLE 2223603fb42aSSebastian Capella bool 2224603fb42aSSebastian Capella depends on MMU 2225603fb42aSSebastian Capella default y if ARCH_SUSPEND_POSSIBLE 2226603fb42aSSebastian Capella 22271da177e4SLinus Torvaldsendmenu 22281da177e4SLinus Torvalds 2229d5950b43SSam Ravnborgsource "net/Kconfig" 2230d5950b43SSam Ravnborg 2231ac25150fSUwe Kleine-Königsource "drivers/Kconfig" 22321da177e4SLinus Torvalds 22331da177e4SLinus Torvaldssource "fs/Kconfig" 22341da177e4SLinus Torvalds 22351da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug" 22361da177e4SLinus Torvalds 22371da177e4SLinus Torvaldssource "security/Kconfig" 22381da177e4SLinus Torvalds 22391da177e4SLinus Torvaldssource "crypto/Kconfig" 22401da177e4SLinus Torvalds 22411da177e4SLinus Torvaldssource "lib/Kconfig" 2242749cf76cSChristoffer Dall 2243749cf76cSChristoffer Dallsource "arch/arm/kvm/Kconfig" 2244