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 9017f161aSKim Phillips select ARCH_USE_BUILTIN_BSWAP 100cbad9c9SWill Deacon select ARCH_USE_CMPXCHG_LOCKREF 11b1b3f49cSRussell King select ARCH_WANT_IPC_PARSE_VERSION 12ee951c63SStephen Boyd select BUILDTIME_EXTABLE_SORT if MMU 13171b3f0dSRussell King select CLONE_BACKWARDS 14b1b3f49cSRussell King select CPU_PM if (SUSPEND || CPU_IDLE) 15dce5c9e3SWill Deacon select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS 164477ca45SUwe Kleine-König select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI) 17b1b3f49cSRussell King select GENERIC_CLOCKEVENTS_BROADCAST if SMP 18171b3f0dSRussell King select GENERIC_IDLE_POLL_SETUP 19b1b3f49cSRussell King select GENERIC_IRQ_PROBE 20b1b3f49cSRussell King select GENERIC_IRQ_SHOW 21b1b3f49cSRussell King select GENERIC_PCI_IOMAP 2238ff87f7SStephen Boyd select GENERIC_SCHED_CLOCK 23b1b3f49cSRussell King select GENERIC_SMP_IDLE_THREAD 24b1b3f49cSRussell King select GENERIC_STRNCPY_FROM_USER 25b1b3f49cSRussell King select GENERIC_STRNLEN_USER 26b1b3f49cSRussell King select HARDIRQS_SW_RESEND 277a017721SAKASHI Takahiro select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) 2809f05d85SRabin Vincent select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL 295cbad0ebSJason Wessel select HAVE_ARCH_KGDB 3091702175SKees Cook select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) 310693bf68SWade Farnsworth select HAVE_ARCH_TRACEHOOK 32b1b3f49cSRussell King select HAVE_BPF_JIT 3351aaf81fSRussell King select HAVE_CC_STACKPROTECTOR 34171b3f0dSRussell King select HAVE_CONTEXT_TRACKING 35b1b3f49cSRussell King select HAVE_C_RECORDMCOUNT 36b1b3f49cSRussell King select HAVE_DEBUG_KMEMLEAK 37b1b3f49cSRussell King select HAVE_DMA_API_DEBUG 38b1b3f49cSRussell King select HAVE_DMA_ATTRS 39b1b3f49cSRussell King select HAVE_DMA_CONTIGUOUS if MMU 40b1b3f49cSRussell King select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) 41dce5c9e3SWill Deacon select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU 42b1b3f49cSRussell King select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) 43b1b3f49cSRussell King select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL) 44b1b3f49cSRussell King select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) 45b1b3f49cSRussell King select HAVE_GENERIC_DMA_COHERENT 46b1b3f49cSRussell King select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7)) 47b1b3f49cSRussell King select HAVE_IDE if PCI || ISA || PCMCIA 4887c46b6cSRussell King select HAVE_IRQ_TIME_ACCOUNTING 49b1b3f49cSRussell King select HAVE_KERNEL_GZIP 50f9b493acSKyungsik Lee select HAVE_KERNEL_LZ4 51b1b3f49cSRussell King select HAVE_KERNEL_LZMA 52b1b3f49cSRussell King select HAVE_KERNEL_LZO 53b1b3f49cSRussell King select HAVE_KERNEL_XZ 54856bc356SJon Medhurst select HAVE_KPROBES if !XIP_KERNEL 559edddaa2SAnanth N Mavinakayanahalli select HAVE_KRETPROBES if (HAVE_KPROBES) 56b1b3f49cSRussell King select HAVE_MEMBLOCK 57171b3f0dSRussell King select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND 58b1b3f49cSRussell King select HAVE_OPROFILE if (HAVE_PERF_EVENTS) 597ada189fSJamie Iles select HAVE_PERF_EVENTS 6049863894SWill Deacon select HAVE_PERF_REGS 6149863894SWill Deacon select HAVE_PERF_USER_STACK_DUMP 62e513f8bfSWill Deacon select HAVE_REGS_AND_STACK_ACCESS_API 63b1b3f49cSRussell King select HAVE_SYSCALL_TRACEPOINTS 64af1839ebSCatalin Marinas select HAVE_UID16 6531c1fc81SKevin Hilman select HAVE_VIRT_CPU_ACCOUNTING_GEN 66da0ec6f7SThomas Gleixner select IRQ_FORCED_THREADING 673d92a71aSAnna-Maria Gleixner select KTIME_SCALAR 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 8674facffeSRussell King bool 8774facffeSRussell King 884ce63fcdSMarek Szyprowskiconfig NEED_SG_DMA_LENGTH 894ce63fcdSMarek Szyprowski bool 904ce63fcdSMarek Szyprowski 914ce63fcdSMarek Szyprowskiconfig ARM_DMA_USE_IOMMU 924ce63fcdSMarek Szyprowski bool 93b1b3f49cSRussell King select ARM_HAS_SG_CHAIN 94b1b3f49cSRussell King select NEED_SG_DMA_LENGTH 954ce63fcdSMarek Szyprowski 9660460abfSSeung-Woo Kimif ARM_DMA_USE_IOMMU 9760460abfSSeung-Woo Kim 9860460abfSSeung-Woo Kimconfig ARM_DMA_IOMMU_ALIGNMENT 9960460abfSSeung-Woo Kim int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers" 10060460abfSSeung-Woo Kim range 4 9 10160460abfSSeung-Woo Kim default 8 10260460abfSSeung-Woo Kim help 10360460abfSSeung-Woo Kim DMA mapping framework by default aligns all buffers to the smallest 10460460abfSSeung-Woo Kim PAGE_SIZE order which is greater than or equal to the requested buffer 10560460abfSSeung-Woo Kim size. This works well for buffers up to a few hundreds kilobytes, but 10660460abfSSeung-Woo Kim for larger buffers it just a waste of address space. Drivers which has 10760460abfSSeung-Woo Kim relatively small addressing window (like 64Mib) might run out of 10860460abfSSeung-Woo Kim virtual space with just a few allocations. 10960460abfSSeung-Woo Kim 11060460abfSSeung-Woo Kim With this parameter you can specify the maximum PAGE_SIZE order for 11160460abfSSeung-Woo Kim DMA IOMMU buffers. Larger buffers will be aligned only to this 11260460abfSSeung-Woo Kim specified order. The order is expressed as a power of two multiplied 11360460abfSSeung-Woo Kim by the PAGE_SIZE. 11460460abfSSeung-Woo Kim 11560460abfSSeung-Woo Kimendif 11660460abfSSeung-Woo Kim 1170b05da72SHans Ulli Krollconfig MIGHT_HAVE_PCI 1180b05da72SHans Ulli Kroll bool 1190b05da72SHans Ulli Kroll 12075e7153aSRalf Baechleconfig SYS_SUPPORTS_APM_EMULATION 12175e7153aSRalf Baechle bool 12275e7153aSRalf Baechle 123bc581770SLinus Walleijconfig HAVE_TCM 124bc581770SLinus Walleij bool 125bc581770SLinus Walleij select GENERIC_ALLOCATOR 126bc581770SLinus Walleij 127e119bfffSRussell Kingconfig HAVE_PROC_CPU 128e119bfffSRussell King bool 129e119bfffSRussell King 130ce816fa8SUwe Kleine-Königconfig NO_IOPORT_MAP 1315ea81769SAl Viro bool 1325ea81769SAl Viro 1331da177e4SLinus Torvaldsconfig EISA 1341da177e4SLinus Torvalds bool 1351da177e4SLinus Torvalds ---help--- 1361da177e4SLinus Torvalds The Extended Industry Standard Architecture (EISA) bus was 1371da177e4SLinus Torvalds developed as an open alternative to the IBM MicroChannel bus. 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds The EISA bus provided some of the features of the IBM MicroChannel 1401da177e4SLinus Torvalds bus while maintaining backward compatibility with cards made for 1411da177e4SLinus Torvalds the older ISA bus. The EISA bus saw limited use between 1988 and 1421da177e4SLinus Torvalds 1995 when it was made obsolete by the PCI bus. 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds Say Y here if you are building a kernel for an EISA-based machine. 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds Otherwise, say N. 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvaldsconfig SBUS 1491da177e4SLinus Torvalds bool 1501da177e4SLinus Torvalds 151f16fb1ecSRussell Kingconfig STACKTRACE_SUPPORT 152f16fb1ecSRussell King bool 153f16fb1ecSRussell King default y 154f16fb1ecSRussell King 155f76e9154SNicolas Pitreconfig HAVE_LATENCYTOP_SUPPORT 156f76e9154SNicolas Pitre bool 157f76e9154SNicolas Pitre depends on !SMP 158f76e9154SNicolas Pitre default y 159f76e9154SNicolas Pitre 160f16fb1ecSRussell Kingconfig LOCKDEP_SUPPORT 161f16fb1ecSRussell King bool 162f16fb1ecSRussell King default y 163f16fb1ecSRussell King 1647ad1bcb2SRussell Kingconfig TRACE_IRQFLAGS_SUPPORT 1657ad1bcb2SRussell King bool 1667ad1bcb2SRussell King default y 1677ad1bcb2SRussell King 1681da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM 1691da177e4SLinus Torvalds bool 1708a87411bSWill Deacon default y 1711da177e4SLinus Torvalds 172f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U32 173f0d1b0b3SDavid Howells bool 174f0d1b0b3SDavid Howells 175f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U64 176f0d1b0b3SDavid Howells bool 177f0d1b0b3SDavid Howells 1784a1b5733SEduardo Valentinconfig ARCH_HAS_BANDGAP 1794a1b5733SEduardo Valentin bool 1804a1b5733SEduardo Valentin 181b89c3b16SAkinobu Mitaconfig GENERIC_HWEIGHT 182b89c3b16SAkinobu Mita bool 183b89c3b16SAkinobu Mita default y 184b89c3b16SAkinobu Mita 1851da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY 1861da177e4SLinus Torvalds bool 1871da177e4SLinus Torvalds default y 1881da177e4SLinus Torvalds 189a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC 190a08b6b79Sviro@ZenIV.linux.org.uk bool 191a08b6b79Sviro@ZenIV.linux.org.uk 1925ac6da66SChristoph Lameterconfig ZONE_DMA 1935ac6da66SChristoph Lameter bool 1945ac6da66SChristoph Lameter 195ccd7ab7fSFUJITA Tomonoriconfig NEED_DMA_MAP_STATE 196ccd7ab7fSFUJITA Tomonori def_bool y 197ccd7ab7fSFUJITA Tomonori 198c7edc9e3SDavid A. Longconfig ARCH_SUPPORTS_UPROBES 199c7edc9e3SDavid A. Long def_bool y 200c7edc9e3SDavid A. Long 20158af4a24SRob Herringconfig ARCH_HAS_DMA_SET_COHERENT_MASK 20258af4a24SRob Herring bool 20358af4a24SRob Herring 2041da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA 2051da177e4SLinus Torvalds bool 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvaldsconfig FIQ 2081da177e4SLinus Torvalds bool 2091da177e4SLinus Torvalds 21013a5045dSRob Herringconfig NEED_RET_TO_USER 21113a5045dSRob Herring bool 21213a5045dSRob Herring 213034d2f5aSAl Viroconfig ARCH_MTD_XIP 214034d2f5aSAl Viro bool 215034d2f5aSAl Viro 216c760fc19SHyok S. Choiconfig VECTORS_BASE 217c760fc19SHyok S. Choi hex 2186afd6faeSHyok S. Choi default 0xffff0000 if MMU || CPU_HIGH_VECTOR 219c760fc19SHyok S. Choi default DRAM_BASE if REMAP_VECTORS_TO_RAM 220c760fc19SHyok S. Choi default 0x00000000 221c760fc19SHyok S. Choi help 22219accfd3SRussell King The base address of exception vectors. This must be two pages 22319accfd3SRussell King in size. 224c760fc19SHyok S. Choi 225dc21af99SRussell Kingconfig ARM_PATCH_PHYS_VIRT 226c1becedcSRussell King bool "Patch physical to virtual translations at runtime" if EMBEDDED 227c1becedcSRussell King default y 228b511d75dSNicolas Pitre depends on !XIP_KERNEL && MMU 229dc21af99SRussell King depends on !ARCH_REALVIEW || !SPARSEMEM 230dc21af99SRussell King help 231111e9a5cSRussell King Patch phys-to-virt and virt-to-phys translation functions at 232111e9a5cSRussell King boot and module load time according to the position of the 233111e9a5cSRussell King kernel in system memory. 234dc21af99SRussell King 235111e9a5cSRussell King This can only be used with non-XIP MMU kernels where the base 236daece596SNicolas Pitre of physical memory is at a 16MB boundary. 237dc21af99SRussell King 238c1becedcSRussell King Only disable this option if you know that you do not require 239c1becedcSRussell King this feature (eg, building a kernel for a single machine) and 240c1becedcSRussell King you need to shrink the kernel to the minimal size. 241c1becedcSRussell King 24201464226SRob Herringconfig NEED_MACH_GPIO_H 24301464226SRob Herring bool 24401464226SRob Herring help 24501464226SRob Herring Select this when mach/gpio.h is required to provide special 24601464226SRob Herring definitions for this platform. The need for mach/gpio.h should 24701464226SRob Herring be avoided when possible. 24801464226SRob Herring 249c334bc15SRob Herringconfig NEED_MACH_IO_H 250c334bc15SRob Herring bool 251c334bc15SRob Herring help 252c334bc15SRob Herring Select this when mach/io.h is required to provide special 253c334bc15SRob Herring definitions for this platform. The need for mach/io.h should 254c334bc15SRob Herring be avoided when possible. 255c334bc15SRob Herring 2560cdc8b92SNicolas Pitreconfig NEED_MACH_MEMORY_H 2571b9f95f8SNicolas Pitre bool 258111e9a5cSRussell King help 2590cdc8b92SNicolas Pitre Select this when mach/memory.h is required to provide special 2600cdc8b92SNicolas Pitre definitions for this platform. The need for mach/memory.h should 2610cdc8b92SNicolas Pitre be avoided when possible. 2621b9f95f8SNicolas Pitre 2631b9f95f8SNicolas Pitreconfig PHYS_OFFSET 264974c0724SNicolas Pitre hex "Physical address of main memory" if MMU 2650cdc8b92SNicolas Pitre depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H 266974c0724SNicolas Pitre default DRAM_BASE if !MMU 2671b9f95f8SNicolas Pitre help 2681b9f95f8SNicolas Pitre Please provide the physical address corresponding to the 2691b9f95f8SNicolas Pitre location of main memory in your system. 270cada3c08SRussell King 27187e040b6SSimon Glassconfig GENERIC_BUG 27287e040b6SSimon Glass def_bool y 27387e040b6SSimon Glass depends on BUG 27487e040b6SSimon Glass 2751da177e4SLinus Torvaldssource "init/Kconfig" 2761da177e4SLinus Torvalds 277dc52ddc0SMatt Helsleysource "kernel/Kconfig.freezer" 278dc52ddc0SMatt Helsley 2791da177e4SLinus Torvaldsmenu "System Type" 2801da177e4SLinus Torvalds 2813c427975SHyok S. Choiconfig MMU 2823c427975SHyok S. Choi bool "MMU-based Paged Memory Management Support" 2833c427975SHyok S. Choi default y 2843c427975SHyok S. Choi help 2853c427975SHyok S. Choi Select if you want MMU-based virtualised addressing space 2863c427975SHyok S. Choi support by paged memory management. If unsure, say 'Y'. 2873c427975SHyok S. Choi 288ccf50e23SRussell King# 289ccf50e23SRussell King# The "ARM system type" choice list is ordered alphabetically by option 290ccf50e23SRussell King# text. Please add new entries in the option alphabetic order. 291ccf50e23SRussell King# 2921da177e4SLinus Torvaldschoice 2931da177e4SLinus Torvalds prompt "ARM system type" 2941420b22bSArnd Bergmann default ARCH_VERSATILE if !MMU 2951420b22bSArnd Bergmann default ARCH_MULTIPLATFORM if MMU 2961da177e4SLinus Torvalds 297387798b3SRob Herringconfig ARCH_MULTIPLATFORM 298387798b3SRob Herring bool "Allow multiple platforms to be selected" 299b1b3f49cSRussell King depends on MMU 300ddb902ccSRob Herring select ARCH_WANT_OPTIONAL_GPIOLIB 30142dc836dSOlof Johansson select ARM_HAS_SG_CHAIN 302387798b3SRob Herring select ARM_PATCH_PHYS_VIRT 303387798b3SRob Herring select AUTO_ZRELADDR 3046d0add40SRob Herring select CLKSRC_OF 30566314223SDinh Nguyen select COMMON_CLK 306ddb902ccSRob Herring select GENERIC_CLOCKEVENTS 30708d38bebSWill Deacon select MIGHT_HAVE_PCI 308387798b3SRob Herring select MULTI_IRQ_HANDLER 30966314223SDinh Nguyen select SPARSE_IRQ 31066314223SDinh Nguyen select USE_OF 31166314223SDinh Nguyen 3124af6fee1SDeepak Saxenaconfig ARCH_INTEGRATOR 3134af6fee1SDeepak Saxena bool "ARM Ltd. Integrator family" 314b1b3f49cSRussell King select ARM_AMBA 315fe989145Spanchaxari select ARM_PATCH_PHYS_VIRT 316fe989145Spanchaxari select AUTO_ZRELADDR 317a613163dSLinus Walleij select COMMON_CLK 318f9a6aa43SLinus Walleij select COMMON_CLK_VERSATILE 319b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 3209904f793SLinus Walleij select HAVE_TCM 321c5a0adb5SRussell King select ICST 322b1b3f49cSRussell King select MULTI_IRQ_HANDLER 323b1b3f49cSRussell King select NEED_MACH_MEMORY_H 324f4b8b319SRussell King select PLAT_VERSATILE 325695436e3SLinus Walleij select SPARSE_IRQ 326d7057e1dSLinus Walleij select USE_OF 3272389d501SLinus Walleij select VERSATILE_FPGA_IRQ 3284af6fee1SDeepak Saxena help 3294af6fee1SDeepak Saxena Support for ARM's Integrator platform. 3304af6fee1SDeepak Saxena 3314af6fee1SDeepak Saxenaconfig ARCH_REALVIEW 3324af6fee1SDeepak Saxena bool "ARM Ltd. RealView family" 333b1b3f49cSRussell King select ARCH_WANT_OPTIONAL_GPIOLIB 3344af6fee1SDeepak Saxena select ARM_AMBA 335b1b3f49cSRussell King select ARM_TIMER_SP804 336f9a6aa43SLinus Walleij select COMMON_CLK 337f9a6aa43SLinus Walleij select COMMON_CLK_VERSATILE 338ae30ceacSCatalin Marinas select GENERIC_CLOCKEVENTS 339b1b3f49cSRussell King select GPIO_PL061 if GPIOLIB 340b1b3f49cSRussell King select ICST 341b1b3f49cSRussell King select NEED_MACH_MEMORY_H 342f4b8b319SRussell King select PLAT_VERSATILE 3433cb5ee49SRussell King select PLAT_VERSATILE_CLCD 3444af6fee1SDeepak Saxena help 3454af6fee1SDeepak Saxena This enables support for ARM Ltd RealView boards. 3464af6fee1SDeepak Saxena 3474af6fee1SDeepak Saxenaconfig ARCH_VERSATILE 3484af6fee1SDeepak Saxena bool "ARM Ltd. Versatile family" 349b1b3f49cSRussell King select ARCH_WANT_OPTIONAL_GPIOLIB 3504af6fee1SDeepak Saxena select ARM_AMBA 351b1b3f49cSRussell King select ARM_TIMER_SP804 3524af6fee1SDeepak Saxena select ARM_VIC 3536d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 354b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 355aa3831cfSKyungmin Park select HAVE_MACH_CLKDEV 356c5a0adb5SRussell King select ICST 357f4b8b319SRussell King select PLAT_VERSATILE 3583414ba8cSRussell King select PLAT_VERSATILE_CLCD 359b1b3f49cSRussell King select PLAT_VERSATILE_CLOCK 3602389d501SLinus Walleij select VERSATILE_FPGA_IRQ 3614af6fee1SDeepak Saxena help 3624af6fee1SDeepak Saxena This enables support for ARM Ltd Versatile board. 3634af6fee1SDeepak Saxena 3648fc5ffa0SAndrew Victorconfig ARCH_AT91 3658fc5ffa0SAndrew Victor bool "Atmel AT91" 366f373e8c0SRyan Mallon select ARCH_REQUIRE_GPIOLIB 367bd602995SJean-Christophe PLAGNIOL-VILLARD select CLKDEV_LOOKUP 368e261501dSNicolas Ferre select IRQ_DOMAIN 3691ac02d79SRob Herring select NEED_MACH_IO_H if PCCARD 3706732ae5cSJean-Christophe PLAGNIOL-VILLARD select PINCTRL 3716732ae5cSJean-Christophe PLAGNIOL-VILLARD select PINCTRL_AT91 if USE_OF 3724af6fee1SDeepak Saxena help 373929e994fSNicolas Ferre This enables support for systems based on Atmel 374929e994fSNicolas Ferre AT91RM9200 and AT91SAM9* processors. 3754af6fee1SDeepak Saxena 37693e22567SRussell Kingconfig ARCH_CLPS711X 37793e22567SRussell King bool "Cirrus Logic CLPS711x/EP721x/EP731x-based" 378a3b8d4a5SAlexander Shiyan select ARCH_REQUIRE_GPIOLIB 379ea7d1bc9SAlexander Shiyan select AUTO_ZRELADDR 380c99f72adSAlexander Shiyan select CLKSRC_MMIO 38193e22567SRussell King select COMMON_CLK 38293e22567SRussell King select CPU_ARM720T 3834a8355c4SAlexander Shiyan select GENERIC_CLOCKEVENTS 3846597619fSAlexander Shiyan select MFD_SYSCON 38593e22567SRussell King help 38693e22567SRussell King Support for Cirrus Logic 711x/721x/731x based boards. 38793e22567SRussell King 388788c9700SRussell Kingconfig ARCH_GEMINI 389788c9700SRussell King bool "Cortina Systems Gemini" 390788c9700SRussell King select ARCH_REQUIRE_GPIOLIB 391f3372c01SLinus Walleij select CLKSRC_MMIO 392b1b3f49cSRussell King select CPU_FA526 393f3372c01SLinus Walleij select GENERIC_CLOCKEVENTS 394788c9700SRussell King help 395788c9700SRussell King Support for the Cortina Systems Gemini family SoCs 396788c9700SRussell King 3971da177e4SLinus Torvaldsconfig ARCH_EBSA110 3981da177e4SLinus Torvalds bool "EBSA-110" 399b1b3f49cSRussell King select ARCH_USES_GETTIMEOFFSET 400c750815eSRussell King select CPU_SA110 401f7e68bbfSRussell King select ISA 402c334bc15SRob Herring select NEED_MACH_IO_H 4030cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 404ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 4051da177e4SLinus Torvalds help 4061da177e4SLinus Torvalds This is an evaluation board for the StrongARM processor available 407f6c8965aSMartin Michlmayr from Digital. It has limited hardware on-board, including an 4081da177e4SLinus Torvalds Ethernet interface, two PCMCIA sockets, two serial ports and a 4091da177e4SLinus Torvalds parallel port. 4101da177e4SLinus Torvalds 4116d85e2b0SUwe Kleine-Königconfig ARCH_EFM32 4126d85e2b0SUwe Kleine-König bool "Energy Micro efm32" 4136d85e2b0SUwe Kleine-König depends on !MMU 4146d85e2b0SUwe Kleine-König select ARCH_REQUIRE_GPIOLIB 4156d85e2b0SUwe Kleine-König select ARM_NVIC 41651aaf81fSRussell King select AUTO_ZRELADDR 4176d85e2b0SUwe Kleine-König select CLKSRC_OF 4186d85e2b0SUwe Kleine-König select COMMON_CLK 4196d85e2b0SUwe Kleine-König select CPU_V7M 4206d85e2b0SUwe Kleine-König select GENERIC_CLOCKEVENTS 4216d85e2b0SUwe Kleine-König select NO_DMA 422ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 4236d85e2b0SUwe Kleine-König select SPARSE_IRQ 4246d85e2b0SUwe Kleine-König select USE_OF 4256d85e2b0SUwe Kleine-König help 4266d85e2b0SUwe Kleine-König Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko 4276d85e2b0SUwe Kleine-König processors. 4286d85e2b0SUwe Kleine-König 429e7736d47SLennert Buytenhekconfig ARCH_EP93XX 430e7736d47SLennert Buytenhek bool "EP93xx-based" 431b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 432b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 433b1b3f49cSRussell King select ARCH_USES_GETTIMEOFFSET 434e7736d47SLennert Buytenhek select ARM_AMBA 435e7736d47SLennert Buytenhek select ARM_VIC 4366d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 437b1b3f49cSRussell King select CPU_ARM920T 4385725aeaeSArnd Bergmann select NEED_MACH_MEMORY_H 439e7736d47SLennert Buytenhek help 440e7736d47SLennert Buytenhek This enables support for the Cirrus EP93xx series of CPUs. 441e7736d47SLennert Buytenhek 4421da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE 4431da177e4SLinus Torvalds bool "FootBridge" 444c750815eSRussell King select CPU_SA110 4451da177e4SLinus Torvalds select FOOTBRIDGE 4464e8d7637SRussell King select GENERIC_CLOCKEVENTS 447d0ee9f40SArnd Bergmann select HAVE_IDE 4488ef6e620SRob Herring select NEED_MACH_IO_H if !MMU 4490cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 450f999b8bdSMartin Michlmayr help 451f999b8bdSMartin Michlmayr Support for systems based on the DC21285 companion chip 452f999b8bdSMartin Michlmayr ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 4531da177e4SLinus Torvalds 4544af6fee1SDeepak Saxenaconfig ARCH_NETX 4554af6fee1SDeepak Saxena bool "Hilscher NetX based" 456b1b3f49cSRussell King select ARM_VIC 457234b6cedSRussell King select CLKSRC_MMIO 458c750815eSRussell King select CPU_ARM926T 4592fcfe6b8SUwe Kleine-König select GENERIC_CLOCKEVENTS 460f999b8bdSMartin Michlmayr help 4614af6fee1SDeepak Saxena This enables support for systems based on the Hilscher NetX Soc 4624af6fee1SDeepak Saxena 4633b938be6SRussell Kingconfig ARCH_IOP13XX 4643b938be6SRussell King bool "IOP13xx-based" 4653b938be6SRussell King depends on MMU 466b1b3f49cSRussell King select CPU_XSC3 4670cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 46813a5045dSRob Herring select NEED_RET_TO_USER 469b1b3f49cSRussell King select PCI 470b1b3f49cSRussell King select PLAT_IOP 471b1b3f49cSRussell King select VMSPLIT_1G 47237ebbcffSThomas Gleixner select SPARSE_IRQ 4733b938be6SRussell King help 4743b938be6SRussell King Support for Intel's IOP13XX (XScale) family of processors. 4753b938be6SRussell King 4763f7e5815SLennert Buytenhekconfig ARCH_IOP32X 4773f7e5815SLennert Buytenhek bool "IOP32x-based" 478a4f7e763SRussell King depends on MMU 479b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 480c750815eSRussell King select CPU_XSCALE 481e9004f50SLinus Walleij select GPIO_IOP 48213a5045dSRob Herring select NEED_RET_TO_USER 483f7e68bbfSRussell King select PCI 484b1b3f49cSRussell King select PLAT_IOP 485f999b8bdSMartin Michlmayr help 4863f7e5815SLennert Buytenhek Support for Intel's 80219 and IOP32X (XScale) family of 4873f7e5815SLennert Buytenhek processors. 4883f7e5815SLennert Buytenhek 4893f7e5815SLennert Buytenhekconfig ARCH_IOP33X 4903f7e5815SLennert Buytenhek bool "IOP33x-based" 4913f7e5815SLennert Buytenhek depends on MMU 492b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 493c750815eSRussell King select CPU_XSCALE 494e9004f50SLinus Walleij select GPIO_IOP 49513a5045dSRob Herring select NEED_RET_TO_USER 4963f7e5815SLennert Buytenhek select PCI 497b1b3f49cSRussell King select PLAT_IOP 4983f7e5815SLennert Buytenhek help 4993f7e5815SLennert Buytenhek Support for Intel's IOP33X (XScale) family of processors. 5001da177e4SLinus Torvalds 5013b938be6SRussell Kingconfig ARCH_IXP4XX 5023b938be6SRussell King bool "IXP4xx-based" 503a4f7e763SRussell King depends on MMU 50458af4a24SRob Herring select ARCH_HAS_DMA_SET_COHERENT_MASK 505b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 50651aaf81fSRussell King select ARCH_SUPPORTS_BIG_ENDIAN 507234b6cedSRussell King select CLKSRC_MMIO 508c750815eSRussell King select CPU_XSCALE 509b1b3f49cSRussell King select DMABOUNCE if PCI 5103b938be6SRussell King select GENERIC_CLOCKEVENTS 5110b05da72SHans Ulli Kroll select MIGHT_HAVE_PCI 512c334bc15SRob Herring select NEED_MACH_IO_H 5139296d94dSFlorian Fainelli select USB_EHCI_BIG_ENDIAN_DESC 514171b3f0dSRussell King select USB_EHCI_BIG_ENDIAN_MMIO 515c4713074SLennert Buytenhek help 5163b938be6SRussell King Support for Intel's IXP4XX (XScale) family of processors. 517c4713074SLennert Buytenhek 518edabd38eSSaeed Bisharaconfig ARCH_DOVE 519edabd38eSSaeed Bishara bool "Marvell Dove" 520edabd38eSSaeed Bishara select ARCH_REQUIRE_GPIOLIB 521756b2531SSebastian Hesselbarth select CPU_PJ4 522edabd38eSSaeed Bishara select GENERIC_CLOCKEVENTS 5230f81bd43SRussell King select MIGHT_HAVE_PCI 524171b3f0dSRussell King select MVEBU_MBUS 5259139acd1SSebastian Hesselbarth select PINCTRL 5269139acd1SSebastian Hesselbarth select PINCTRL_DOVE 527abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 528edabd38eSSaeed Bishara help 529edabd38eSSaeed Bishara Support for the Marvell Dove SoC 88AP510 530edabd38eSSaeed Bishara 531651c74c7SSaeed Bisharaconfig ARCH_KIRKWOOD 532651c74c7SSaeed Bishara bool "Marvell Kirkwood" 533a8865655SErik Benada select ARCH_REQUIRE_GPIOLIB 534b1b3f49cSRussell King select CPU_FEROCEON 535651c74c7SSaeed Bishara select GENERIC_CLOCKEVENTS 536171b3f0dSRussell King select MVEBU_MBUS 537b1b3f49cSRussell King select PCI 5381dc831bfSJason Gunthorpe select PCI_QUIRKS 539f9e75922SAndrew Lunn select PINCTRL 540f9e75922SAndrew Lunn select PINCTRL_KIRKWOOD 541abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 542651c74c7SSaeed Bishara help 543651c74c7SSaeed Bishara Support for the following Marvell Kirkwood series SoCs: 544651c74c7SSaeed Bishara 88F6180, 88F6192 and 88F6281. 545651c74c7SSaeed Bishara 546788c9700SRussell Kingconfig ARCH_MV78XX0 547788c9700SRussell King bool "Marvell MV78xx0" 548a8865655SErik Benada select ARCH_REQUIRE_GPIOLIB 549b1b3f49cSRussell King select CPU_FEROCEON 550788c9700SRussell King select GENERIC_CLOCKEVENTS 551171b3f0dSRussell King select MVEBU_MBUS 552b1b3f49cSRussell King select PCI 553abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 554788c9700SRussell King help 555788c9700SRussell King Support for the following Marvell MV78xx0 series SoCs: 556788c9700SRussell King MV781x0, MV782x0. 557788c9700SRussell King 558788c9700SRussell Kingconfig ARCH_ORION5X 559788c9700SRussell King bool "Marvell Orion" 560788c9700SRussell King depends on MMU 561a8865655SErik Benada select ARCH_REQUIRE_GPIOLIB 562b1b3f49cSRussell King select CPU_FEROCEON 563788c9700SRussell King select GENERIC_CLOCKEVENTS 564171b3f0dSRussell King select MVEBU_MBUS 565b1b3f49cSRussell King select PCI 566abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 567788c9700SRussell King help 568788c9700SRussell King Support for the following Marvell Orion 5x series SoCs: 569788c9700SRussell King Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 570788c9700SRussell King Orion-2 (5281), Orion-1-90 (6183). 571788c9700SRussell King 572788c9700SRussell Kingconfig ARCH_MMP 5732f7e8faeSHaojian Zhuang bool "Marvell PXA168/910/MMP2" 574788c9700SRussell King depends on MMU 575788c9700SRussell King select ARCH_REQUIRE_GPIOLIB 5766d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 577b1b3f49cSRussell King select GENERIC_ALLOCATOR 578788c9700SRussell King select GENERIC_CLOCKEVENTS 579157d2644SHaojian Zhuang select GPIO_PXA 580c24b3114SHaojian Zhuang select IRQ_DOMAIN 5810f374561SHaojian Zhuang select MULTI_IRQ_HANDLER 5827c8f86a4SAxel Lin select PINCTRL 583788c9700SRussell King select PLAT_PXA 5840bd86961SHaojian Zhuang select SPARSE_IRQ 585788c9700SRussell King help 5862f7e8faeSHaojian Zhuang Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line. 587788c9700SRussell King 588c53c9cf6SAndrew Victorconfig ARCH_KS8695 589c53c9cf6SAndrew Victor bool "Micrel/Kendin KS8695" 59072880ad8SDaniel Silverstone select ARCH_REQUIRE_GPIOLIB 591c7e783d6SLinus Walleij select CLKSRC_MMIO 592b1b3f49cSRussell King select CPU_ARM922T 593c7e783d6SLinus Walleij select GENERIC_CLOCKEVENTS 594b1b3f49cSRussell King select NEED_MACH_MEMORY_H 595c53c9cf6SAndrew Victor help 596c53c9cf6SAndrew Victor Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 597c53c9cf6SAndrew Victor System-on-Chip devices. 598c53c9cf6SAndrew Victor 599788c9700SRussell Kingconfig ARCH_W90X900 600788c9700SRussell King bool "Nuvoton W90X900 CPU" 601c52d3d68Swanzongshun select ARCH_REQUIRE_GPIOLIB 6026d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 6036fa5d5f7SRussell King select CLKSRC_MMIO 604b1b3f49cSRussell King select CPU_ARM926T 60558b5369eSwanzongshun select GENERIC_CLOCKEVENTS 606777f9bebSLennert Buytenhek help 607a8bc4eadSwanzongshun Support for Nuvoton (Winbond logic dept.) ARM9 processor, 608a8bc4eadSwanzongshun At present, the w90x900 has been renamed nuc900, regarding 609a8bc4eadSwanzongshun the ARM series product line, you can login the following 610a8bc4eadSwanzongshun link address to know more. 611a8bc4eadSwanzongshun 612a8bc4eadSwanzongshun <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/ 613a8bc4eadSwanzongshun ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller> 614585cf175STzachi Perelstein 61593e22567SRussell Kingconfig ARCH_LPC32XX 61693e22567SRussell King bool "NXP LPC32XX" 61793e22567SRussell King select ARCH_REQUIRE_GPIOLIB 61893e22567SRussell King select ARM_AMBA 6194073723aSRussell King select CLKDEV_LOOKUP 620234b6cedSRussell King select CLKSRC_MMIO 62193e22567SRussell King select CPU_ARM926T 62293e22567SRussell King select GENERIC_CLOCKEVENTS 62393e22567SRussell King select HAVE_IDE 62493e22567SRussell King select USE_OF 62593e22567SRussell King help 62693e22567SRussell King Support for the NXP LPC32XX family of processors 62793e22567SRussell King 6281da177e4SLinus Torvaldsconfig ARCH_PXA 6292c8086a5Seric miao bool "PXA2xx/PXA3xx-based" 630a4f7e763SRussell King depends on MMU 631b1b3f49cSRussell King select ARCH_MTD_XIP 632b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 633b1b3f49cSRussell King select ARM_CPU_SUSPEND if PM 634b1b3f49cSRussell King select AUTO_ZRELADDR 6356d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 636234b6cedSRussell King select CLKSRC_MMIO 637981d0f39SEric Miao select GENERIC_CLOCKEVENTS 638157d2644SHaojian Zhuang select GPIO_PXA 639b1b3f49cSRussell King select HAVE_IDE 640b1b3f49cSRussell King select MULTI_IRQ_HANDLER 641bd5ce433SEric Miao select PLAT_PXA 6426ac6b817SHaojian Zhuang select SPARSE_IRQ 643f999b8bdSMartin Michlmayr help 6442c8086a5Seric miao Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 6451da177e4SLinus Torvalds 6468fc1b0f8SKumar Galaconfig ARCH_MSM 6478fc1b0f8SKumar Gala bool "Qualcomm MSM (non-multiplatform)" 648923a081cSPavel Machek select ARCH_REQUIRE_GPIOLIB 6498cc7f533SStephen Boyd select COMMON_CLK 650b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 65149cbe786SEric Miao help 6524b53eb4fSDaniel Walker Support for Qualcomm MSM/QSD based systems. This runs on the 6534b53eb4fSDaniel Walker apps processor of the MSM/QSD and depends on a shared memory 6544b53eb4fSDaniel Walker interface to the modem processor which runs the baseband 6554b53eb4fSDaniel Walker stack and controls some vital subsystems 6564b53eb4fSDaniel Walker (clock and power control, etc). 65749cbe786SEric Miao 658bf98c1eaSLaurent Pinchartconfig ARCH_SHMOBILE_LEGACY 6590d9fd616SLaurent Pinchart bool "Renesas ARM SoCs (non-multiplatform)" 660bf98c1eaSLaurent Pinchart select ARCH_SHMOBILE 66169469995SMagnus Damm select ARM_PATCH_PHYS_VIRT 6625e93c6b4SPaul Mundt select CLKDEV_LOOKUP 663b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 6644c3ffffdSStephen Boyd select HAVE_ARM_SCU if SMP 665a894fcc2SStephen Boyd select HAVE_ARM_TWD if SMP 666aa3831cfSKyungmin Park select HAVE_MACH_CLKDEV 6673b55658aSDave Martin select HAVE_SMP 668ce5ea9f3SDave Martin select MIGHT_HAVE_CACHE_L2X0 66960f1435cSMagnus Damm select MULTI_IRQ_HANDLER 670ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 6712cd3c927SLaurent Pinchart select PINCTRL 672b1b3f49cSRussell King select PM_GENERIC_DOMAINS if PM 673b1b3f49cSRussell King select SPARSE_IRQ 674c793c1b0SMagnus Damm help 6750d9fd616SLaurent Pinchart Support for Renesas ARM SoC platforms using a non-multiplatform 6760d9fd616SLaurent Pinchart kernel. This includes the SH-Mobile, R-Mobile, EMMA-Mobile, R-Car 6770d9fd616SLaurent Pinchart and RZ families. 678c793c1b0SMagnus Damm 6791da177e4SLinus Torvaldsconfig ARCH_RPC 6801da177e4SLinus Torvalds bool "RiscPC" 6811da177e4SLinus Torvalds select ARCH_ACORN 682a08b6b79Sviro@ZenIV.linux.org.uk select ARCH_MAY_HAVE_PC_FDC 68307f841b7SRussell King select ARCH_SPARSEMEM_ENABLE 6845cfc8ee0SJohn Stultz select ARCH_USES_GETTIMEOFFSET 685fa04e209SArnd Bergmann select CPU_SA110 686b1b3f49cSRussell King select FIQ 687d0ee9f40SArnd Bergmann select HAVE_IDE 688b1b3f49cSRussell King select HAVE_PATA_PLATFORM 689b1b3f49cSRussell King select ISA_DMA_API 690c334bc15SRob Herring select NEED_MACH_IO_H 6910cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 692ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 693b4811bacSArnd Bergmann select VIRT_TO_BUS 6941da177e4SLinus Torvalds help 6951da177e4SLinus Torvalds On the Acorn Risc-PC, Linux can support the internal IDE disk and 6961da177e4SLinus Torvalds CD-ROM interface, serial and parallel port, and the floppy drive. 6971da177e4SLinus Torvalds 6981da177e4SLinus Torvaldsconfig ARCH_SA1100 6991da177e4SLinus Torvalds bool "SA1100-based" 700b1b3f49cSRussell King select ARCH_MTD_XIP 7017444a72eSMichael Buesch select ARCH_REQUIRE_GPIOLIB 702b1b3f49cSRussell King select ARCH_SPARSEMEM_ENABLE 703b1b3f49cSRussell King select CLKDEV_LOOKUP 704b1b3f49cSRussell King select CLKSRC_MMIO 705b1b3f49cSRussell King select CPU_FREQ 706b1b3f49cSRussell King select CPU_SA1100 707b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 708d0ee9f40SArnd Bergmann select HAVE_IDE 709b1b3f49cSRussell King select ISA 7100cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 711375dec92SRussell King select SPARSE_IRQ 712f999b8bdSMartin Michlmayr help 713f999b8bdSMartin Michlmayr Support for StrongARM 11x0 based boards. 7141da177e4SLinus Torvalds 715b130d5c2SKukjin Kimconfig ARCH_S3C24XX 716b130d5c2SKukjin Kim bool "Samsung S3C24XX SoCs" 71753650430SKukjin Kim select ARCH_REQUIRE_GPIOLIB 718335cce74SArnd Bergmann select ATAGS 719b1b3f49cSRussell King select CLKDEV_LOOKUP 7204280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 7217f78b6ebSRomain Naour select GENERIC_CLOCKEVENTS 722880cf071STomasz Figa select GPIO_SAMSUNG 72320676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 724b130d5c2SKukjin Kim select HAVE_S3C2410_WATCHDOG if WATCHDOG 725b1b3f49cSRussell King select HAVE_S3C_RTC if RTC_CLASS 72617453dd2SHeiko Stuebner select MULTI_IRQ_HANDLER 727c334bc15SRob Herring select NEED_MACH_IO_H 728cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 7291da177e4SLinus Torvalds help 730b130d5c2SKukjin Kim Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443 731b130d5c2SKukjin Kim and S3C2450 SoCs based systems, such as the Simtec Electronics BAST 732b130d5c2SKukjin Kim (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the 733b130d5c2SKukjin Kim Samsung SMDK2410 development board (and derivatives). 73463b1f51bSBen Dooks 735a08ab637SBen Dooksconfig ARCH_S3C64XX 736a08ab637SBen Dooks bool "Samsung S3C64XX" 73789f0ce72SBen Dooks select ARCH_REQUIRE_GPIOLIB 7381db0287aSTomasz Figa select ARM_AMBA 739b1b3f49cSRussell King select ARM_VIC 740335cce74SArnd Bergmann select ATAGS 741b1b3f49cSRussell King select CLKDEV_LOOKUP 7424280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 743ccecba3cSPankaj Dubey select COMMON_CLK_SAMSUNG 74470bacadbSTomasz Figa select CPU_V6K 74504a49b71SRomain Naour select GENERIC_CLOCKEVENTS 746880cf071STomasz Figa select GPIO_SAMSUNG 74720676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 748c39d8d55SKyungmin Park select HAVE_S3C2410_WATCHDOG if WATCHDOG 749b1b3f49cSRussell King select HAVE_TCM 750ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 751b1b3f49cSRussell King select PLAT_SAMSUNG 7524ab75a3fSArnd Bergmann select PM_GENERIC_DOMAINS if PM 753b1b3f49cSRussell King select S3C_DEV_NAND 754b1b3f49cSRussell King select S3C_GPIO_TRACK 755cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 7566e2d9e93STomasz Figa select SAMSUNG_WAKEMASK 75788f59738STomasz Figa select SAMSUNG_WDT_RESET 758a08ab637SBen Dooks help 759a08ab637SBen Dooks Samsung S3C64XX series based systems 760a08ab637SBen Dooks 7617c6337e2SKevin Hilmanconfig ARCH_DAVINCI 7627c6337e2SKevin Hilman bool "TI DaVinci" 763b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 764dce1115bSDavid Brownell select ARCH_REQUIRE_GPIOLIB 7656d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 76620e9969bSDavid Brownell select GENERIC_ALLOCATOR 767b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 768dc7ad3b3SRussell King select GENERIC_IRQ_CHIP 769b1b3f49cSRussell King select HAVE_IDE 7703ad7a42dSMatt Porter select TI_PRIV_EDMA 771689e331fSSekhar Nori select USE_OF 772b1b3f49cSRussell King select ZONE_DMA 7737c6337e2SKevin Hilman help 7747c6337e2SKevin Hilman Support for TI's DaVinci platform. 7757c6337e2SKevin Hilman 776a0694861STony Lindgrenconfig ARCH_OMAP1 777a0694861STony Lindgren bool "TI OMAP1" 77800a36698SArnd Bergmann depends on MMU 779b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 780a0694861STony Lindgren select ARCH_OMAP 78121f47fbcSAlexey Charkov select ARCH_REQUIRE_GPIOLIB 782e9a91de7STony Prisk select CLKDEV_LOOKUP 783cee37e50Sviresh kumar select CLKSRC_MMIO 784b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 785a0694861STony Lindgren select GENERIC_IRQ_CHIP 786a0694861STony Lindgren select HAVE_IDE 787a0694861STony Lindgren select IRQ_DOMAIN 788a0694861STony Lindgren select NEED_MACH_IO_H if PCCARD 789a0694861STony Lindgren select NEED_MACH_MEMORY_H 79021f47fbcSAlexey Charkov help 791a0694861STony Lindgren Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx) 79202c981c0SBinghua Duan 7931da177e4SLinus Torvaldsendchoice 7941da177e4SLinus Torvalds 795387798b3SRob Herringmenu "Multiple platform selection" 796387798b3SRob Herring depends on ARCH_MULTIPLATFORM 797387798b3SRob Herring 798387798b3SRob Herringcomment "CPU Core family selection" 799387798b3SRob Herring 800f8afae40SArnd Bergmannconfig ARCH_MULTI_V4 801f8afae40SArnd Bergmann bool "ARMv4 based platforms (FA526)" 802f8afae40SArnd Bergmann depends on !ARCH_MULTI_V6_V7 803f8afae40SArnd Bergmann select ARCH_MULTI_V4_V5 804f8afae40SArnd Bergmann select CPU_FA526 805f8afae40SArnd Bergmann 806387798b3SRob Herringconfig ARCH_MULTI_V4T 807387798b3SRob Herring bool "ARMv4T based platforms (ARM720T, ARM920T, ...)" 808387798b3SRob Herring depends on !ARCH_MULTI_V6_V7 809b1b3f49cSRussell King select ARCH_MULTI_V4_V5 81024e860fbSArnd Bergmann select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \ 81124e860fbSArnd Bergmann CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \ 81224e860fbSArnd Bergmann CPU_ARM925T || CPU_ARM940T) 813387798b3SRob Herring 814387798b3SRob Herringconfig ARCH_MULTI_V5 815387798b3SRob Herring bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)" 816387798b3SRob Herring depends on !ARCH_MULTI_V6_V7 817b1b3f49cSRussell King select ARCH_MULTI_V4_V5 81812567bbdSAndrew Lunn select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \ 81924e860fbSArnd Bergmann CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \ 82024e860fbSArnd Bergmann CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON) 821387798b3SRob Herring 822387798b3SRob Herringconfig ARCH_MULTI_V4_V5 823387798b3SRob Herring bool 824387798b3SRob Herring 825387798b3SRob Herringconfig ARCH_MULTI_V6 8268dda05ccSStephen Boyd bool "ARMv6 based platforms (ARM11)" 827387798b3SRob Herring select ARCH_MULTI_V6_V7 82842f4754aSRob Herring select CPU_V6K 829387798b3SRob Herring 830387798b3SRob Herringconfig ARCH_MULTI_V7 8318dda05ccSStephen Boyd bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)" 832387798b3SRob Herring default y 833387798b3SRob Herring select ARCH_MULTI_V6_V7 834b1b3f49cSRussell King select CPU_V7 83590bc8ac7SRob Herring select HAVE_SMP 836387798b3SRob Herring 837387798b3SRob Herringconfig ARCH_MULTI_V6_V7 838387798b3SRob Herring bool 8399352b05bSRob Herring select MIGHT_HAVE_CACHE_L2X0 840387798b3SRob Herring 841387798b3SRob Herringconfig ARCH_MULTI_CPU_AUTO 842387798b3SRob Herring def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7) 843387798b3SRob Herring select ARCH_MULTI_V5 844387798b3SRob Herring 845387798b3SRob Herringendmenu 846387798b3SRob Herring 84705e2a3deSRob Herringconfig ARCH_VIRT 84805e2a3deSRob Herring bool "Dummy Virtual Machine" if ARCH_MULTI_V7 8494b8b5f25SRob Herring select ARM_AMBA 85005e2a3deSRob Herring select ARM_GIC 85105e2a3deSRob Herring select ARM_PSCI 8524b8b5f25SRob Herring select HAVE_ARM_ARCH_TIMER 85305e2a3deSRob Herring 854ccf50e23SRussell King# 855ccf50e23SRussell King# This is sorted alphabetically by mach-* pathname. However, plat-* 856ccf50e23SRussell King# Kconfigs may be included either alphabetically (according to the 857ccf50e23SRussell King# plat- suffix) or along side the corresponding mach-* source. 858ccf50e23SRussell King# 8593e93a22bSGregory CLEMENTsource "arch/arm/mach-mvebu/Kconfig" 8603e93a22bSGregory CLEMENT 86195b8f20fSRussell Kingsource "arch/arm/mach-at91/Kconfig" 86295b8f20fSRussell King 8631d22924eSAnders Bergsource "arch/arm/mach-axxia/Kconfig" 8641d22924eSAnders Berg 8658ac49e04SChristian Daudtsource "arch/arm/mach-bcm/Kconfig" 8668ac49e04SChristian Daudt 8671c37fa10SSebastian Hesselbarthsource "arch/arm/mach-berlin/Kconfig" 8681c37fa10SSebastian Hesselbarth 8691da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig" 8701da177e4SLinus Torvalds 871d94f944eSAnton Vorontsovsource "arch/arm/mach-cns3xxx/Kconfig" 872d94f944eSAnton Vorontsov 87395b8f20fSRussell Kingsource "arch/arm/mach-davinci/Kconfig" 87495b8f20fSRussell King 87595b8f20fSRussell Kingsource "arch/arm/mach-dove/Kconfig" 87695b8f20fSRussell King 877e7736d47SLennert Buytenheksource "arch/arm/mach-ep93xx/Kconfig" 878e7736d47SLennert Buytenhek 8791da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig" 8801da177e4SLinus Torvalds 88159d3a193SPaulius Zaleckassource "arch/arm/mach-gemini/Kconfig" 88259d3a193SPaulius Zaleckas 883387798b3SRob Herringsource "arch/arm/mach-highbank/Kconfig" 884387798b3SRob Herring 885389ee0c2SHaojian Zhuangsource "arch/arm/mach-hisi/Kconfig" 886389ee0c2SHaojian Zhuang 8871da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig" 8881da177e4SLinus Torvalds 8893f7e5815SLennert Buytenheksource "arch/arm/mach-iop32x/Kconfig" 8903f7e5815SLennert Buytenhek 8913f7e5815SLennert Buytenheksource "arch/arm/mach-iop33x/Kconfig" 8921da177e4SLinus Torvalds 893285f5fa7SDan Williamssource "arch/arm/mach-iop13xx/Kconfig" 894285f5fa7SDan Williams 8951da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig" 8961da177e4SLinus Torvalds 897828989adSSantosh Shilimkarsource "arch/arm/mach-keystone/Kconfig" 898828989adSSantosh Shilimkar 89995b8f20fSRussell Kingsource "arch/arm/mach-kirkwood/Kconfig" 90095b8f20fSRussell King 90195b8f20fSRussell Kingsource "arch/arm/mach-ks8695/Kconfig" 90295b8f20fSRussell King 90395b8f20fSRussell Kingsource "arch/arm/mach-msm/Kconfig" 90495b8f20fSRussell King 90517723fd3SJonas Jensensource "arch/arm/mach-moxart/Kconfig" 90617723fd3SJonas Jensen 907794d15b2SStanislav Samsonovsource "arch/arm/mach-mv78xx0/Kconfig" 908794d15b2SStanislav Samsonov 9093995eb82SShawn Guosource "arch/arm/mach-imx/Kconfig" 9101da177e4SLinus Torvalds 9111d3f33d5SShawn Guosource "arch/arm/mach-mxs/Kconfig" 9121d3f33d5SShawn Guo 91395b8f20fSRussell Kingsource "arch/arm/mach-netx/Kconfig" 91449cbe786SEric Miao 91595b8f20fSRussell Kingsource "arch/arm/mach-nomadik/Kconfig" 91695b8f20fSRussell King 9179851ca57SDaniel Tangsource "arch/arm/mach-nspire/Kconfig" 9189851ca57SDaniel Tang 919d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig" 920d48af15eSTony Lindgren 921d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig" 9221da177e4SLinus Torvalds 9231dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig" 9241dbae815STony Lindgren 9259dd0b194SLennert Buytenheksource "arch/arm/mach-orion5x/Kconfig" 926585cf175STzachi Perelstein 927387798b3SRob Herringsource "arch/arm/mach-picoxcell/Kconfig" 928387798b3SRob Herring 92995b8f20fSRussell Kingsource "arch/arm/mach-pxa/Kconfig" 93095b8f20fSRussell Kingsource "arch/arm/plat-pxa/Kconfig" 9311da177e4SLinus Torvalds 93295b8f20fSRussell Kingsource "arch/arm/mach-mmp/Kconfig" 93395b8f20fSRussell King 9348fc1b0f8SKumar Galasource "arch/arm/mach-qcom/Kconfig" 9358fc1b0f8SKumar Gala 93695b8f20fSRussell Kingsource "arch/arm/mach-realview/Kconfig" 93795b8f20fSRussell King 938d63dc051SHeiko Stuebnersource "arch/arm/mach-rockchip/Kconfig" 939d63dc051SHeiko Stuebner 94095b8f20fSRussell Kingsource "arch/arm/mach-sa1100/Kconfig" 941edabd38eSSaeed Bishara 942387798b3SRob Herringsource "arch/arm/mach-socfpga/Kconfig" 943387798b3SRob Herring 944a7ed099fSArnd Bergmannsource "arch/arm/mach-spear/Kconfig" 945a21765a7SBen Dooks 94665ebcc11SSrinivas Kandagatlasource "arch/arm/mach-sti/Kconfig" 94765ebcc11SSrinivas Kandagatla 94885fd6d63SKukjin Kimsource "arch/arm/mach-s3c24xx/Kconfig" 9491da177e4SLinus Torvalds 950431107eaSBen Dookssource "arch/arm/mach-s3c64xx/Kconfig" 951a08ab637SBen Dooks 952170f4e42SKukjin Kimsource "arch/arm/mach-s5pv210/Kconfig" 953170f4e42SKukjin Kim 95483014579SKukjin Kimsource "arch/arm/mach-exynos/Kconfig" 955e509b289SRob Herringsource "arch/arm/plat-samsung/Kconfig" 956cc0e72b8SChanghwan Youn 957882d01f9SRussell Kingsource "arch/arm/mach-shmobile/Kconfig" 9581da177e4SLinus Torvalds 9593b52634fSMaxime Ripardsource "arch/arm/mach-sunxi/Kconfig" 9603b52634fSMaxime Ripard 961156a0997SBarry Songsource "arch/arm/mach-prima2/Kconfig" 962156a0997SBarry Song 963c5f80065SErik Gillingsource "arch/arm/mach-tegra/Kconfig" 964c5f80065SErik Gilling 96595b8f20fSRussell Kingsource "arch/arm/mach-u300/Kconfig" 9661da177e4SLinus Torvalds 96795b8f20fSRussell Kingsource "arch/arm/mach-ux500/Kconfig" 9681da177e4SLinus Torvalds 9691da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig" 9701da177e4SLinus Torvalds 971ceade897SRussell Kingsource "arch/arm/mach-vexpress/Kconfig" 972420c34e4SRussell Kingsource "arch/arm/plat-versatile/Kconfig" 973ceade897SRussell King 9746f35f9a9STony Prisksource "arch/arm/mach-vt8500/Kconfig" 9756f35f9a9STony Prisk 9767ec80ddfSwanzongshunsource "arch/arm/mach-w90x900/Kconfig" 9777ec80ddfSwanzongshun 9789a45eb69SJosh Cartwrightsource "arch/arm/mach-zynq/Kconfig" 9799a45eb69SJosh Cartwright 9801da177e4SLinus Torvalds# Definitions to make life easier 9811da177e4SLinus Torvaldsconfig ARCH_ACORN 9821da177e4SLinus Torvalds bool 9831da177e4SLinus Torvalds 9847ae1f7ecSLennert Buytenhekconfig PLAT_IOP 9857ae1f7ecSLennert Buytenhek bool 986469d3044SMikael Pettersson select GENERIC_CLOCKEVENTS 9877ae1f7ecSLennert Buytenhek 98869b02f6aSLennert Buytenhekconfig PLAT_ORION 98969b02f6aSLennert Buytenhek bool 990bfe45e0bSRussell King select CLKSRC_MMIO 991b1b3f49cSRussell King select COMMON_CLK 992dc7ad3b3SRussell King select GENERIC_IRQ_CHIP 993278b45b0SAndrew Lunn select IRQ_DOMAIN 99469b02f6aSLennert Buytenhek 995abcda1dcSThomas Petazzoniconfig PLAT_ORION_LEGACY 996abcda1dcSThomas Petazzoni bool 997abcda1dcSThomas Petazzoni select PLAT_ORION 998abcda1dcSThomas Petazzoni 999bd5ce433SEric Miaoconfig PLAT_PXA 1000bd5ce433SEric Miao bool 1001bd5ce433SEric Miao 1002f4b8b319SRussell Kingconfig PLAT_VERSATILE 1003f4b8b319SRussell King bool 1004f4b8b319SRussell King 1005e3887714SRussell Kingconfig ARM_TIMER_SP804 1006e3887714SRussell King bool 1007bfe45e0bSRussell King select CLKSRC_MMIO 10087a0eca71SRob Herring select CLKSRC_OF if OF 1009e3887714SRussell King 1010d9a1beaaSAlexandre Courbotsource "arch/arm/firmware/Kconfig" 1011d9a1beaaSAlexandre Courbot 10121da177e4SLinus Torvaldssource arch/arm/mm/Kconfig 10131da177e4SLinus Torvalds 1014afe4b25eSLennert Buytenhekconfig IWMMXT 1015d93003e8SSebastian Hesselbarth bool "Enable iWMMXt support" 1016d93003e8SSebastian Hesselbarth depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B 1017d93003e8SSebastian Hesselbarth default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B 1018afe4b25eSLennert Buytenhek help 1019afe4b25eSLennert Buytenhek Enable support for iWMMXt context switching at run time if 1020afe4b25eSLennert Buytenhek running on a CPU that supports it. 1021afe4b25eSLennert Buytenhek 102252108641Seric miaoconfig MULTI_IRQ_HANDLER 102352108641Seric miao bool 102452108641Seric miao help 102552108641Seric miao Allow each machine to specify it's own IRQ handler at run time. 102652108641Seric miao 10273b93e7b0SHyok S. Choiif !MMU 10283b93e7b0SHyok S. Choisource "arch/arm/Kconfig-nommu" 10293b93e7b0SHyok S. Choiendif 10303b93e7b0SHyok S. Choi 10313e0a07f8SGregory CLEMENTconfig PJ4B_ERRATA_4742 10323e0a07f8SGregory CLEMENT bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation" 10333e0a07f8SGregory CLEMENT depends on CPU_PJ4B && MACH_ARMADA_370 10343e0a07f8SGregory CLEMENT default y 10353e0a07f8SGregory CLEMENT help 10363e0a07f8SGregory CLEMENT When coming out of either a Wait for Interrupt (WFI) or a Wait for 10373e0a07f8SGregory CLEMENT Event (WFE) IDLE states, a specific timing sensitivity exists between 10383e0a07f8SGregory CLEMENT the retiring WFI/WFE instructions and the newly issued subsequent 10393e0a07f8SGregory CLEMENT instructions. This sensitivity can result in a CPU hang scenario. 10403e0a07f8SGregory CLEMENT Workaround: 10413e0a07f8SGregory CLEMENT The software must insert either a Data Synchronization Barrier (DSB) 10423e0a07f8SGregory CLEMENT or Data Memory Barrier (DMB) command immediately after the WFI/WFE 10433e0a07f8SGregory CLEMENT instruction 10443e0a07f8SGregory CLEMENT 1045f0c4b8d6SWill Deaconconfig ARM_ERRATA_326103 1046f0c4b8d6SWill Deacon bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory" 1047f0c4b8d6SWill Deacon depends on CPU_V6 1048f0c4b8d6SWill Deacon help 1049f0c4b8d6SWill Deacon Executing a SWP instruction to read-only memory does not set bit 11 1050f0c4b8d6SWill Deacon of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to 1051f0c4b8d6SWill Deacon treat the access as a read, preventing a COW from occurring and 1052f0c4b8d6SWill Deacon causing the faulting task to livelock. 1053f0c4b8d6SWill Deacon 10549cba3cccSCatalin Marinasconfig ARM_ERRATA_411920 10559cba3cccSCatalin Marinas bool "ARM errata: Invalidation of the Instruction Cache operation can fail" 1056e399b1a4SRussell King depends on CPU_V6 || CPU_V6K 10579cba3cccSCatalin Marinas help 10589cba3cccSCatalin Marinas Invalidation of the Instruction Cache operation can 10599cba3cccSCatalin Marinas fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. 10609cba3cccSCatalin Marinas It does not affect the MPCore. This option enables the ARM Ltd. 10619cba3cccSCatalin Marinas recommended workaround. 10629cba3cccSCatalin Marinas 10637ce236fcSCatalin Marinasconfig ARM_ERRATA_430973 10647ce236fcSCatalin Marinas bool "ARM errata: Stale prediction on replaced interworking branch" 10657ce236fcSCatalin Marinas depends on CPU_V7 10667ce236fcSCatalin Marinas help 10677ce236fcSCatalin Marinas This option enables the workaround for the 430973 Cortex-A8 10687ce236fcSCatalin Marinas (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb 10697ce236fcSCatalin Marinas interworking branch is replaced with another code sequence at the 10707ce236fcSCatalin Marinas same virtual address, whether due to self-modifying code or virtual 10717ce236fcSCatalin Marinas to physical address re-mapping, Cortex-A8 does not recover from the 10727ce236fcSCatalin Marinas stale interworking branch prediction. This results in Cortex-A8 10737ce236fcSCatalin Marinas executing the new code sequence in the incorrect ARM or Thumb state. 10747ce236fcSCatalin Marinas The workaround enables the BTB/BTAC operations by setting ACTLR.IBE 10757ce236fcSCatalin Marinas and also flushes the branch target cache at every context switch. 10767ce236fcSCatalin Marinas Note that setting specific bits in the ACTLR register may not be 10777ce236fcSCatalin Marinas available in non-secure mode. 10787ce236fcSCatalin Marinas 1079855c551fSCatalin Marinasconfig ARM_ERRATA_458693 1080855c551fSCatalin Marinas bool "ARM errata: Processor deadlock when a false hazard is created" 1081855c551fSCatalin Marinas depends on CPU_V7 108262e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1083855c551fSCatalin Marinas help 1084855c551fSCatalin Marinas This option enables the workaround for the 458693 Cortex-A8 (r2p0) 1085855c551fSCatalin Marinas erratum. For very specific sequences of memory operations, it is 1086855c551fSCatalin Marinas possible for a hazard condition intended for a cache line to instead 1087855c551fSCatalin Marinas be incorrectly associated with a different cache line. This false 1088855c551fSCatalin Marinas hazard might then cause a processor deadlock. The workaround enables 1089855c551fSCatalin Marinas the L1 caching of the NEON accesses and disables the PLD instruction 1090855c551fSCatalin Marinas in the ACTLR register. Note that setting specific bits in the ACTLR 1091855c551fSCatalin Marinas register may not be available in non-secure mode. 1092855c551fSCatalin Marinas 10930516e464SCatalin Marinasconfig ARM_ERRATA_460075 10940516e464SCatalin Marinas bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" 10950516e464SCatalin Marinas depends on CPU_V7 109662e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 10970516e464SCatalin Marinas help 10980516e464SCatalin Marinas This option enables the workaround for the 460075 Cortex-A8 (r2p0) 10990516e464SCatalin Marinas erratum. Any asynchronous access to the L2 cache may encounter a 11000516e464SCatalin Marinas situation in which recent store transactions to the L2 cache are lost 11010516e464SCatalin Marinas and overwritten with stale memory contents from external memory. The 11020516e464SCatalin Marinas workaround disables the write-allocate mode for the L2 cache via the 11030516e464SCatalin Marinas ACTLR register. Note that setting specific bits in the ACTLR register 11040516e464SCatalin Marinas may not be available in non-secure mode. 11050516e464SCatalin Marinas 11069f05027cSWill Deaconconfig ARM_ERRATA_742230 11079f05027cSWill Deacon bool "ARM errata: DMB operation may be faulty" 11089f05027cSWill Deacon depends on CPU_V7 && SMP 110962e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 11109f05027cSWill Deacon help 11119f05027cSWill Deacon This option enables the workaround for the 742230 Cortex-A9 11129f05027cSWill Deacon (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction 11139f05027cSWill Deacon between two write operations may not ensure the correct visibility 11149f05027cSWill Deacon ordering of the two writes. This workaround sets a specific bit in 11159f05027cSWill Deacon the diagnostic register of the Cortex-A9 which causes the DMB 11169f05027cSWill Deacon instruction to behave as a DSB, ensuring the correct behaviour of 11179f05027cSWill Deacon the two writes. 11189f05027cSWill Deacon 1119a672e99bSWill Deaconconfig ARM_ERRATA_742231 1120a672e99bSWill Deacon bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption" 1121a672e99bSWill Deacon depends on CPU_V7 && SMP 112262e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1123a672e99bSWill Deacon help 1124a672e99bSWill Deacon This option enables the workaround for the 742231 Cortex-A9 1125a672e99bSWill Deacon (r2p0..r2p2) erratum. Under certain conditions, specific to the 1126a672e99bSWill Deacon Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode, 1127a672e99bSWill Deacon accessing some data located in the same cache line, may get corrupted 1128a672e99bSWill Deacon data due to bad handling of the address hazard when the line gets 1129a672e99bSWill Deacon replaced from one of the CPUs at the same time as another CPU is 1130a672e99bSWill Deacon accessing it. This workaround sets specific bits in the diagnostic 1131a672e99bSWill Deacon register of the Cortex-A9 which reduces the linefill issuing 1132a672e99bSWill Deacon capabilities of the processor. 1133a672e99bSWill Deacon 113469155794SJon Medhurstconfig ARM_ERRATA_643719 113569155794SJon Medhurst bool "ARM errata: LoUIS bit field in CLIDR register is incorrect" 113669155794SJon Medhurst depends on CPU_V7 && SMP 113769155794SJon Medhurst help 113869155794SJon Medhurst This option enables the workaround for the 643719 Cortex-A9 (prior to 113969155794SJon Medhurst r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR 114069155794SJon Medhurst register returns zero when it should return one. The workaround 114169155794SJon Medhurst corrects this value, ensuring cache maintenance operations which use 114269155794SJon Medhurst it behave as intended and avoiding data corruption. 114369155794SJon Medhurst 1144cdf357f1SWill Deaconconfig ARM_ERRATA_720789 1145cdf357f1SWill Deacon bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID" 1146e66dc745SDave Martin depends on CPU_V7 1147cdf357f1SWill Deacon help 1148cdf357f1SWill Deacon This option enables the workaround for the 720789 Cortex-A9 (prior to 1149cdf357f1SWill Deacon r2p0) erratum. A faulty ASID can be sent to the other CPUs for the 1150cdf357f1SWill Deacon broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS. 1151cdf357f1SWill Deacon As a consequence of this erratum, some TLB entries which should be 1152cdf357f1SWill Deacon invalidated are not, resulting in an incoherency in the system page 1153cdf357f1SWill Deacon tables. The workaround changes the TLB flushing routines to invalidate 1154cdf357f1SWill Deacon entries regardless of the ASID. 1155475d92fcSWill Deacon 1156475d92fcSWill Deaconconfig ARM_ERRATA_743622 1157475d92fcSWill Deacon bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption" 1158475d92fcSWill Deacon depends on CPU_V7 115962e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1160475d92fcSWill Deacon help 1161475d92fcSWill Deacon This option enables the workaround for the 743622 Cortex-A9 1162efbc74acSWill Deacon (r2p*) erratum. Under very rare conditions, a faulty 1163475d92fcSWill Deacon optimisation in the Cortex-A9 Store Buffer may lead to data 1164475d92fcSWill Deacon corruption. This workaround sets a specific bit in the diagnostic 1165475d92fcSWill Deacon register of the Cortex-A9 which disables the Store Buffer 1166475d92fcSWill Deacon optimisation, preventing the defect from occurring. This has no 1167475d92fcSWill Deacon visible impact on the overall performance or power consumption of the 1168475d92fcSWill Deacon processor. 1169475d92fcSWill Deacon 11709a27c27cSWill Deaconconfig ARM_ERRATA_751472 11719a27c27cSWill Deacon bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation" 1172ba90c516SDave Martin depends on CPU_V7 117362e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 11749a27c27cSWill Deacon help 11759a27c27cSWill Deacon This option enables the workaround for the 751472 Cortex-A9 (prior 11769a27c27cSWill Deacon to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the 11779a27c27cSWill Deacon completion of a following broadcasted operation if the second 11789a27c27cSWill Deacon operation is received by a CPU before the ICIALLUIS has completed, 11799a27c27cSWill Deacon potentially leading to corrupted entries in the cache or TLB. 11809a27c27cSWill Deacon 1181fcbdc5feSWill Deaconconfig ARM_ERRATA_754322 1182fcbdc5feSWill Deacon bool "ARM errata: possible faulty MMU translations following an ASID switch" 1183fcbdc5feSWill Deacon depends on CPU_V7 1184fcbdc5feSWill Deacon help 1185fcbdc5feSWill Deacon This option enables the workaround for the 754322 Cortex-A9 (r2p*, 1186fcbdc5feSWill Deacon r3p*) erratum. A speculative memory access may cause a page table walk 1187fcbdc5feSWill Deacon which starts prior to an ASID switch but completes afterwards. This 1188fcbdc5feSWill Deacon can populate the micro-TLB with a stale entry which may be hit with 1189fcbdc5feSWill Deacon the new ASID. This workaround places two dsb instructions in the mm 1190fcbdc5feSWill Deacon switching code so that no page table walks can cross the ASID switch. 1191fcbdc5feSWill Deacon 11925dab26afSWill Deaconconfig ARM_ERRATA_754327 11935dab26afSWill Deacon bool "ARM errata: no automatic Store Buffer drain" 11945dab26afSWill Deacon depends on CPU_V7 && SMP 11955dab26afSWill Deacon help 11965dab26afSWill Deacon This option enables the workaround for the 754327 Cortex-A9 (prior to 11975dab26afSWill Deacon r2p0) erratum. The Store Buffer does not have any automatic draining 11985dab26afSWill Deacon mechanism and therefore a livelock may occur if an external agent 11995dab26afSWill Deacon continuously polls a memory location waiting to observe an update. 12005dab26afSWill Deacon This workaround defines cpu_relax() as smp_mb(), preventing correctly 12015dab26afSWill Deacon written polling loops from denying visibility of updates to memory. 12025dab26afSWill Deacon 1203145e10e1SCatalin Marinasconfig ARM_ERRATA_364296 1204145e10e1SCatalin Marinas bool "ARM errata: Possible cache data corruption with hit-under-miss enabled" 1205fd832478SFabio Estevam depends on CPU_V6 1206145e10e1SCatalin Marinas help 1207145e10e1SCatalin Marinas This options enables the workaround for the 364296 ARM1136 1208145e10e1SCatalin Marinas r0p2 erratum (possible cache data corruption with 1209145e10e1SCatalin Marinas hit-under-miss enabled). It sets the undocumented bit 31 in 1210145e10e1SCatalin Marinas the auxiliary control register and the FI bit in the control 1211145e10e1SCatalin Marinas register, thus disabling hit-under-miss without putting the 1212145e10e1SCatalin Marinas processor into full low interrupt latency mode. ARM11MPCore 1213145e10e1SCatalin Marinas is not affected. 1214145e10e1SCatalin Marinas 1215f630c1bdSWill Deaconconfig ARM_ERRATA_764369 1216f630c1bdSWill Deacon bool "ARM errata: Data cache line maintenance operation by MVA may not succeed" 1217f630c1bdSWill Deacon depends on CPU_V7 && SMP 1218f630c1bdSWill Deacon help 1219f630c1bdSWill Deacon This option enables the workaround for erratum 764369 1220f630c1bdSWill Deacon affecting Cortex-A9 MPCore with two or more processors (all 1221f630c1bdSWill Deacon current revisions). Under certain timing circumstances, a data 1222f630c1bdSWill Deacon cache line maintenance operation by MVA targeting an Inner 1223f630c1bdSWill Deacon Shareable memory region may fail to proceed up to either the 1224f630c1bdSWill Deacon Point of Coherency or to the Point of Unification of the 1225f630c1bdSWill Deacon system. This workaround adds a DSB instruction before the 1226f630c1bdSWill Deacon relevant cache maintenance functions and sets a specific bit 1227f630c1bdSWill Deacon in the diagnostic control register of the SCU. 1228f630c1bdSWill Deacon 12297253b85cSSimon Hormanconfig ARM_ERRATA_775420 12307253b85cSSimon Horman bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock" 12317253b85cSSimon Horman depends on CPU_V7 12327253b85cSSimon Horman help 12337253b85cSSimon Horman This option enables the workaround for the 775420 Cortex-A9 (r2p2, 12347253b85cSSimon Horman r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance 12357253b85cSSimon Horman operation aborts with MMU exception, it might cause the processor 12367253b85cSSimon Horman to deadlock. This workaround puts DSB before executing ISB if 12377253b85cSSimon Horman an abort may occur on cache maintenance. 12387253b85cSSimon Horman 123993dc6887SCatalin Marinasconfig ARM_ERRATA_798181 124093dc6887SCatalin Marinas bool "ARM errata: TLBI/DSB failure on Cortex-A15" 124193dc6887SCatalin Marinas depends on CPU_V7 && SMP 124293dc6887SCatalin Marinas help 124393dc6887SCatalin Marinas On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not 124493dc6887SCatalin Marinas adequately shooting down all use of the old entries. This 124593dc6887SCatalin Marinas option enables the Linux kernel workaround for this erratum 124693dc6887SCatalin Marinas which sends an IPI to the CPUs that are running the same ASID 124793dc6887SCatalin Marinas as the one being invalidated. 124893dc6887SCatalin Marinas 124984b6504fSWill Deaconconfig ARM_ERRATA_773022 125084b6504fSWill Deacon bool "ARM errata: incorrect instructions may be executed from loop buffer" 125184b6504fSWill Deacon depends on CPU_V7 125284b6504fSWill Deacon help 125384b6504fSWill Deacon This option enables the workaround for the 773022 Cortex-A15 125484b6504fSWill Deacon (up to r0p4) erratum. In certain rare sequences of code, the 125584b6504fSWill Deacon loop buffer may deliver incorrect instructions. This 125684b6504fSWill Deacon workaround disables the loop buffer to avoid the erratum. 125784b6504fSWill Deacon 12581da177e4SLinus Torvaldsendmenu 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvaldssource "arch/arm/common/Kconfig" 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvaldsmenu "Bus support" 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvaldsconfig ARM_AMBA 12651da177e4SLinus Torvalds bool 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvaldsconfig ISA 12681da177e4SLinus Torvalds bool 12691da177e4SLinus Torvalds help 12701da177e4SLinus Torvalds Find out whether you have ISA slots on your motherboard. ISA is the 12711da177e4SLinus Torvalds name of a bus system, i.e. the way the CPU talks to the other stuff 12721da177e4SLinus Torvalds inside your box. Other bus systems are PCI, EISA, MicroChannel 12731da177e4SLinus Torvalds (MCA) or VESA. ISA is an older system, now being displaced by PCI; 12741da177e4SLinus Torvalds newer boards don't support it. If you have ISA, say Y, otherwise N. 12751da177e4SLinus Torvalds 1276065909b9SRussell King# Select ISA DMA controller support 12771da177e4SLinus Torvaldsconfig ISA_DMA 12781da177e4SLinus Torvalds bool 1279065909b9SRussell King select ISA_DMA_API 12801da177e4SLinus Torvalds 1281065909b9SRussell King# Select ISA DMA interface 12825cae841bSAl Viroconfig ISA_DMA_API 12835cae841bSAl Viro bool 12845cae841bSAl Viro 12851da177e4SLinus Torvaldsconfig PCI 12860b05da72SHans Ulli Kroll bool "PCI support" if MIGHT_HAVE_PCI 12871da177e4SLinus Torvalds help 12881da177e4SLinus Torvalds Find out whether you have a PCI motherboard. PCI is the name of a 12891da177e4SLinus Torvalds bus system, i.e. the way the CPU talks to the other stuff inside 12901da177e4SLinus Torvalds your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 12911da177e4SLinus Torvalds VESA. If you have PCI, say Y, otherwise N. 12921da177e4SLinus Torvalds 129352882173SAnton Vorontsovconfig PCI_DOMAINS 129452882173SAnton Vorontsov bool 129552882173SAnton Vorontsov depends on PCI 129652882173SAnton Vorontsov 1297b080ac8aSMarcelo Roberto Jimenezconfig PCI_NANOENGINE 1298b080ac8aSMarcelo Roberto Jimenez bool "BSE nanoEngine PCI support" 1299b080ac8aSMarcelo Roberto Jimenez depends on SA1100_NANOENGINE 1300b080ac8aSMarcelo Roberto Jimenez help 1301b080ac8aSMarcelo Roberto Jimenez Enable PCI on the BSE nanoEngine board. 1302b080ac8aSMarcelo Roberto Jimenez 130336e23590SMatthew Wilcoxconfig PCI_SYSCALL 130436e23590SMatthew Wilcox def_bool PCI 130536e23590SMatthew Wilcox 1306a0113a99SMike Rapoportconfig PCI_HOST_ITE8152 1307a0113a99SMike Rapoport bool 1308a0113a99SMike Rapoport depends on PCI && MACH_ARMCORE 1309a0113a99SMike Rapoport default y 1310a0113a99SMike Rapoport select DMABOUNCE 1311a0113a99SMike Rapoport 13121da177e4SLinus Torvaldssource "drivers/pci/Kconfig" 13133f06d157SJingoo Hansource "drivers/pci/pcie/Kconfig" 13141da177e4SLinus Torvalds 13151da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig" 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvaldsendmenu 13181da177e4SLinus Torvalds 13191da177e4SLinus Torvaldsmenu "Kernel Features" 13201da177e4SLinus Torvalds 13213b55658aSDave Martinconfig HAVE_SMP 13223b55658aSDave Martin bool 13233b55658aSDave Martin help 13243b55658aSDave Martin This option should be selected by machines which have an SMP- 13253b55658aSDave Martin capable CPU. 13263b55658aSDave Martin 13273b55658aSDave Martin The only effect of this option is to make the SMP-related 13283b55658aSDave Martin options available to the user for configuration. 13293b55658aSDave Martin 13301da177e4SLinus Torvaldsconfig SMP 1331bb2d8130SRussell King bool "Symmetric Multi-Processing" 1332fbb4ddacSRussell King depends on CPU_V6K || CPU_V7 1333bc28248eSRussell King depends on GENERIC_CLOCKEVENTS 13343b55658aSDave Martin depends on HAVE_SMP 1335801bb21cSJonathan Austin depends on MMU || ARM_MPU 13361da177e4SLinus Torvalds help 13371da177e4SLinus Torvalds This enables support for systems with more than one CPU. If you have 13384a474157SRobert Graffham a system with only one CPU, say N. If you have a system with more 13394a474157SRobert Graffham than one CPU, say Y. 13401da177e4SLinus Torvalds 13414a474157SRobert Graffham If you say N here, the kernel will run on uni- and multiprocessor 13421da177e4SLinus Torvalds machines, but will use only one CPU of a multiprocessor machine. If 13434a474157SRobert Graffham you say Y here, the kernel will run on many, but not all, 13444a474157SRobert Graffham uniprocessor machines. On a uniprocessor machine, the kernel 13454a474157SRobert Graffham will run faster if you say N here. 13461da177e4SLinus Torvalds 1347395cf969SPaul Bolle See also <file:Documentation/x86/i386/IO-APIC.txt>, 13481da177e4SLinus Torvalds <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 134950a23e6eSJustin P. Mattock <http://tldp.org/HOWTO/SMP-HOWTO.html>. 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds If you don't know what to do here, say N. 13521da177e4SLinus Torvalds 1353f00ec48fSRussell Kingconfig SMP_ON_UP 1354f00ec48fSRussell King bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)" 1355801bb21cSJonathan Austin depends on SMP && !XIP_KERNEL && MMU 1356f00ec48fSRussell King default y 1357f00ec48fSRussell King help 1358f00ec48fSRussell King SMP kernels contain instructions which fail on non-SMP processors. 1359f00ec48fSRussell King Enabling this option allows the kernel to modify itself to make 1360f00ec48fSRussell King these instructions safe. Disabling it allows about 1K of space 1361f00ec48fSRussell King savings. 1362f00ec48fSRussell King 1363f00ec48fSRussell King If you don't know what to do here, say Y. 1364f00ec48fSRussell King 1365c9018aabSVincent Guittotconfig ARM_CPU_TOPOLOGY 1366c9018aabSVincent Guittot bool "Support cpu topology definition" 1367c9018aabSVincent Guittot depends on SMP && CPU_V7 1368c9018aabSVincent Guittot default y 1369c9018aabSVincent Guittot help 1370c9018aabSVincent Guittot Support ARM cpu topology definition. The MPIDR register defines 1371c9018aabSVincent Guittot affinity between processors which is then used to describe the cpu 1372c9018aabSVincent Guittot topology of an ARM System. 1373c9018aabSVincent Guittot 1374c9018aabSVincent Guittotconfig SCHED_MC 1375c9018aabSVincent Guittot bool "Multi-core scheduler support" 1376c9018aabSVincent Guittot depends on ARM_CPU_TOPOLOGY 1377c9018aabSVincent Guittot help 1378c9018aabSVincent Guittot Multi-core scheduler support improves the CPU scheduler's decision 1379c9018aabSVincent Guittot making when dealing with multi-core CPU chips at a cost of slightly 1380c9018aabSVincent Guittot increased overhead in some places. If unsure say N here. 1381c9018aabSVincent Guittot 1382c9018aabSVincent Guittotconfig SCHED_SMT 1383c9018aabSVincent Guittot bool "SMT scheduler support" 1384c9018aabSVincent Guittot depends on ARM_CPU_TOPOLOGY 1385c9018aabSVincent Guittot help 1386c9018aabSVincent Guittot Improves the CPU scheduler's decision making when dealing with 1387c9018aabSVincent Guittot MultiThreading at a cost of slightly increased overhead in some 1388c9018aabSVincent Guittot places. If unsure say N here. 1389c9018aabSVincent Guittot 1390a8cbcd92SRussell Kingconfig HAVE_ARM_SCU 1391a8cbcd92SRussell King bool 1392a8cbcd92SRussell King help 1393a8cbcd92SRussell King This option enables support for the ARM system coherency unit 1394a8cbcd92SRussell King 13958a4da6e3SMark Rutlandconfig HAVE_ARM_ARCH_TIMER 1396022c03a2SMarc Zyngier bool "Architected timer support" 1397022c03a2SMarc Zyngier depends on CPU_V7 13988a4da6e3SMark Rutland select ARM_ARCH_TIMER 13990c403462SWill Deacon select GENERIC_CLOCKEVENTS 1400022c03a2SMarc Zyngier help 1401022c03a2SMarc Zyngier This option enables support for the ARM architected timer 1402022c03a2SMarc Zyngier 1403f32f4ce2SRussell Kingconfig HAVE_ARM_TWD 1404f32f4ce2SRussell King bool 1405f32f4ce2SRussell King depends on SMP 1406da4a686aSRob Herring select CLKSRC_OF if OF 1407f32f4ce2SRussell King help 1408f32f4ce2SRussell King This options enables support for the ARM timer and watchdog unit 1409f32f4ce2SRussell King 1410e8db288eSNicolas Pitreconfig MCPM 1411e8db288eSNicolas Pitre bool "Multi-Cluster Power Management" 1412e8db288eSNicolas Pitre depends on CPU_V7 && SMP 1413e8db288eSNicolas Pitre help 1414e8db288eSNicolas Pitre This option provides the common power management infrastructure 1415e8db288eSNicolas Pitre for (multi-)cluster based systems, such as big.LITTLE based 1416e8db288eSNicolas Pitre systems. 1417e8db288eSNicolas Pitre 14181c33be57SNicolas Pitreconfig BIG_LITTLE 14191c33be57SNicolas Pitre bool "big.LITTLE support (Experimental)" 14201c33be57SNicolas Pitre depends on CPU_V7 && SMP 14211c33be57SNicolas Pitre select MCPM 14221c33be57SNicolas Pitre help 14231c33be57SNicolas Pitre This option enables support selections for the big.LITTLE 14241c33be57SNicolas Pitre system architecture. 14251c33be57SNicolas Pitre 14261c33be57SNicolas Pitreconfig BL_SWITCHER 14271c33be57SNicolas Pitre bool "big.LITTLE switcher support" 14281c33be57SNicolas Pitre depends on BIG_LITTLE && MCPM && HOTPLUG_CPU 14291c33be57SNicolas Pitre select ARM_CPU_SUSPEND 143051aaf81fSRussell King select CPU_PM 14311c33be57SNicolas Pitre help 14321c33be57SNicolas Pitre The big.LITTLE "switcher" provides the core functionality to 14331c33be57SNicolas Pitre transparently handle transition between a cluster of A15's 14341c33be57SNicolas Pitre and a cluster of A7's in a big.LITTLE system. 14351c33be57SNicolas Pitre 1436b22537c6SNicolas Pitreconfig BL_SWITCHER_DUMMY_IF 1437b22537c6SNicolas Pitre tristate "Simple big.LITTLE switcher user interface" 1438b22537c6SNicolas Pitre depends on BL_SWITCHER && DEBUG_KERNEL 1439b22537c6SNicolas Pitre help 1440b22537c6SNicolas Pitre This is a simple and dummy char dev interface to control 1441b22537c6SNicolas Pitre the big.LITTLE switcher core code. It is meant for 1442b22537c6SNicolas Pitre debugging purposes only. 1443b22537c6SNicolas Pitre 14448d5796d2SLennert Buytenhekchoice 14458d5796d2SLennert Buytenhek prompt "Memory split" 1446006fa259SRussell King depends on MMU 14478d5796d2SLennert Buytenhek default VMSPLIT_3G 14488d5796d2SLennert Buytenhek help 14498d5796d2SLennert Buytenhek Select the desired split between kernel and user memory. 14508d5796d2SLennert Buytenhek 14518d5796d2SLennert Buytenhek If you are not absolutely sure what you are doing, leave this 14528d5796d2SLennert Buytenhek option alone! 14538d5796d2SLennert Buytenhek 14548d5796d2SLennert Buytenhek config VMSPLIT_3G 14558d5796d2SLennert Buytenhek bool "3G/1G user/kernel split" 14568d5796d2SLennert Buytenhek config VMSPLIT_2G 14578d5796d2SLennert Buytenhek bool "2G/2G user/kernel split" 14588d5796d2SLennert Buytenhek config VMSPLIT_1G 14598d5796d2SLennert Buytenhek bool "1G/3G user/kernel split" 14608d5796d2SLennert Buytenhekendchoice 14618d5796d2SLennert Buytenhek 14628d5796d2SLennert Buytenhekconfig PAGE_OFFSET 14638d5796d2SLennert Buytenhek hex 1464006fa259SRussell King default PHYS_OFFSET if !MMU 14658d5796d2SLennert Buytenhek default 0x40000000 if VMSPLIT_1G 14668d5796d2SLennert Buytenhek default 0x80000000 if VMSPLIT_2G 14678d5796d2SLennert Buytenhek default 0xC0000000 14688d5796d2SLennert Buytenhek 14691da177e4SLinus Torvaldsconfig NR_CPUS 14701da177e4SLinus Torvalds int "Maximum number of CPUs (2-32)" 14711da177e4SLinus Torvalds range 2 32 14721da177e4SLinus Torvalds depends on SMP 14731da177e4SLinus Torvalds default "4" 14741da177e4SLinus Torvalds 1475a054a811SRussell Kingconfig HOTPLUG_CPU 147600b7dedeSRussell King bool "Support for hot-pluggable CPUs" 147740b31360SStephen Rothwell depends on SMP 1478a054a811SRussell King help 1479a054a811SRussell King Say Y here to experiment with turning CPUs off and on. CPUs 1480a054a811SRussell King can be controlled through /sys/devices/system/cpu. 1481a054a811SRussell King 14822bdd424fSWill Deaconconfig ARM_PSCI 14832bdd424fSWill Deacon bool "Support for the ARM Power State Coordination Interface (PSCI)" 14842bdd424fSWill Deacon depends on CPU_V7 14852bdd424fSWill Deacon help 14862bdd424fSWill Deacon Say Y here if you want Linux to communicate with system firmware 14872bdd424fSWill Deacon implementing the PSCI specification for CPU-centric power 14882bdd424fSWill Deacon management operations described in ARM document number ARM DEN 14892bdd424fSWill Deacon 0022A ("Power State Coordination Interface System Software on 14902bdd424fSWill Deacon ARM processors"). 14912bdd424fSWill Deacon 14922a6ad871SMaxime Ripard# The GPIO number here must be sorted by descending number. In case of 14932a6ad871SMaxime Ripard# a multiplatform kernel, we just want the highest value required by the 14942a6ad871SMaxime Ripard# selected platforms. 149544986ab0SPeter De Schrijver (NVIDIA)config ARCH_NR_GPIO 149644986ab0SPeter De Schrijver (NVIDIA) int 14973dea19e8SPeter De Schrijver (NVIDIA) default 1024 if ARCH_SHMOBILE || ARCH_TEGRA 1498*aa42587aSTomasz Figa default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \ 1499*aa42587aSTomasz Figa SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210 1500eb171a99SBoris BREZILLON default 416 if ARCH_SUNXI 150106b851e5SOlof Johansson default 392 if ARCH_U8500 150201bb914cSTony Prisk default 352 if ARCH_VT8500 15032a6ad871SMaxime Ripard default 264 if MACH_H4700 150444986ab0SPeter De Schrijver (NVIDIA) default 0 150544986ab0SPeter De Schrijver (NVIDIA) help 150644986ab0SPeter De Schrijver (NVIDIA) Maximum number of GPIOs in the system. 150744986ab0SPeter De Schrijver (NVIDIA) 150844986ab0SPeter De Schrijver (NVIDIA) If unsure, leave the default value. 150944986ab0SPeter De Schrijver (NVIDIA) 1510d45a398fSUwe Kleine-Königsource kernel/Kconfig.preempt 15111da177e4SLinus Torvalds 1512c9218b16SRussell Kingconfig HZ_FIXED 1513f8065813SRussell King int 1514070b8b43SKukjin Kim default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \ 1515a73ddc61SKukjin Kim ARCH_S5PV210 || ARCH_EXYNOS4 15165248c657SDavid Brownell default AT91_TIMER_HZ if ARCH_AT91 1517bf98c1eaSLaurent Pinchart default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY 151847d84682SRussell King default 0 1519c9218b16SRussell King 1520c9218b16SRussell Kingchoice 152147d84682SRussell King depends on HZ_FIXED = 0 1522c9218b16SRussell King prompt "Timer frequency" 1523c9218b16SRussell King 1524c9218b16SRussell Kingconfig HZ_100 1525c9218b16SRussell King bool "100 Hz" 1526c9218b16SRussell King 1527c9218b16SRussell Kingconfig HZ_200 1528c9218b16SRussell King bool "200 Hz" 1529c9218b16SRussell King 1530c9218b16SRussell Kingconfig HZ_250 1531c9218b16SRussell King bool "250 Hz" 1532c9218b16SRussell King 1533c9218b16SRussell Kingconfig HZ_300 1534c9218b16SRussell King bool "300 Hz" 1535c9218b16SRussell King 1536c9218b16SRussell Kingconfig HZ_500 1537c9218b16SRussell King bool "500 Hz" 1538c9218b16SRussell King 1539c9218b16SRussell Kingconfig HZ_1000 1540c9218b16SRussell King bool "1000 Hz" 1541c9218b16SRussell King 1542c9218b16SRussell Kingendchoice 1543c9218b16SRussell King 1544c9218b16SRussell Kingconfig HZ 1545c9218b16SRussell King int 154647d84682SRussell King default HZ_FIXED if HZ_FIXED != 0 1547c9218b16SRussell King default 100 if HZ_100 1548c9218b16SRussell King default 200 if HZ_200 1549c9218b16SRussell King default 250 if HZ_250 1550c9218b16SRussell King default 300 if HZ_300 1551c9218b16SRussell King default 500 if HZ_500 1552c9218b16SRussell King default 1000 1553c9218b16SRussell King 1554c9218b16SRussell Kingconfig SCHED_HRTICK 1555c9218b16SRussell King def_bool HIGH_RES_TIMERS 1556f8065813SRussell King 155716c79651SCatalin Marinasconfig THUMB2_KERNEL 1558bc7dea00SUwe Kleine-König bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY 15594477ca45SUwe Kleine-König depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K 1560bc7dea00SUwe Kleine-König default y if CPU_THUMBONLY 156116c79651SCatalin Marinas select AEABI 156216c79651SCatalin Marinas select ARM_ASM_UNIFIED 156389bace65SArnd Bergmann select ARM_UNWIND 156416c79651SCatalin Marinas help 156516c79651SCatalin Marinas By enabling this option, the kernel will be compiled in 156616c79651SCatalin Marinas Thumb-2 mode. A compiler/assembler that understand the unified 156716c79651SCatalin Marinas ARM-Thumb syntax is needed. 156816c79651SCatalin Marinas 156916c79651SCatalin Marinas If unsure, say N. 157016c79651SCatalin Marinas 15716f685c5cSDave Martinconfig THUMB2_AVOID_R_ARM_THM_JUMP11 15726f685c5cSDave Martin bool "Work around buggy Thumb-2 short branch relocations in gas" 15736f685c5cSDave Martin depends on THUMB2_KERNEL && MODULES 15746f685c5cSDave Martin default y 15756f685c5cSDave Martin help 15766f685c5cSDave Martin Various binutils versions can resolve Thumb-2 branches to 15776f685c5cSDave Martin locally-defined, preemptible global symbols as short-range "b.n" 15786f685c5cSDave Martin branch instructions. 15796f685c5cSDave Martin 15806f685c5cSDave Martin This is a problem, because there's no guarantee the final 15816f685c5cSDave Martin destination of the symbol, or any candidate locations for a 15826f685c5cSDave Martin trampoline, are within range of the branch. For this reason, the 15836f685c5cSDave Martin kernel does not support fixing up the R_ARM_THM_JUMP11 (102) 15846f685c5cSDave Martin relocation in modules at all, and it makes little sense to add 15856f685c5cSDave Martin support. 15866f685c5cSDave Martin 15876f685c5cSDave Martin The symptom is that the kernel fails with an "unsupported 15886f685c5cSDave Martin relocation" error when loading some modules. 15896f685c5cSDave Martin 15906f685c5cSDave Martin Until fixed tools are available, passing 15916f685c5cSDave Martin -fno-optimize-sibling-calls to gcc should prevent gcc generating 15926f685c5cSDave Martin code which hits this problem, at the cost of a bit of extra runtime 15936f685c5cSDave Martin stack usage in some cases. 15946f685c5cSDave Martin 15956f685c5cSDave Martin The problem is described in more detail at: 15966f685c5cSDave Martin https://bugs.launchpad.net/binutils-linaro/+bug/725126 15976f685c5cSDave Martin 15986f685c5cSDave Martin Only Thumb-2 kernels are affected. 15996f685c5cSDave Martin 16006f685c5cSDave Martin Unless you are sure your tools don't have this problem, say Y. 16016f685c5cSDave Martin 16020becb088SCatalin Marinasconfig ARM_ASM_UNIFIED 16030becb088SCatalin Marinas bool 16040becb088SCatalin Marinas 1605704bdda0SNicolas Pitreconfig AEABI 1606704bdda0SNicolas Pitre bool "Use the ARM EABI to compile the kernel" 1607704bdda0SNicolas Pitre help 1608704bdda0SNicolas Pitre This option allows for the kernel to be compiled using the latest 1609704bdda0SNicolas Pitre ARM ABI (aka EABI). This is only useful if you are using a user 1610704bdda0SNicolas Pitre space environment that is also compiled with EABI. 1611704bdda0SNicolas Pitre 1612704bdda0SNicolas Pitre Since there are major incompatibilities between the legacy ABI and 1613704bdda0SNicolas Pitre EABI, especially with regard to structure member alignment, this 1614704bdda0SNicolas Pitre option also changes the kernel syscall calling convention to 1615704bdda0SNicolas Pitre disambiguate both ABIs and allow for backward compatibility support 1616704bdda0SNicolas Pitre (selected with CONFIG_OABI_COMPAT). 1617704bdda0SNicolas Pitre 1618704bdda0SNicolas Pitre To use this you need GCC version 4.0.0 or later. 1619704bdda0SNicolas Pitre 16206c90c872SNicolas Pitreconfig OABI_COMPAT 1621a73a3ff1SRussell King bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 1622d6f94fa0SKees Cook depends on AEABI && !THUMB2_KERNEL 16236c90c872SNicolas Pitre help 16246c90c872SNicolas Pitre This option preserves the old syscall interface along with the 16256c90c872SNicolas Pitre new (ARM EABI) one. It also provides a compatibility layer to 16266c90c872SNicolas Pitre intercept syscalls that have structure arguments which layout 16276c90c872SNicolas Pitre in memory differs between the legacy ABI and the new ARM EABI 16286c90c872SNicolas Pitre (only for non "thumb" binaries). This option adds a tiny 16296c90c872SNicolas Pitre overhead to all syscalls and produces a slightly larger kernel. 163091702175SKees Cook 163191702175SKees Cook The seccomp filter system will not be available when this is 163291702175SKees Cook selected, since there is no way yet to sensibly distinguish 163391702175SKees Cook between calling conventions during filtering. 163491702175SKees Cook 16356c90c872SNicolas Pitre If you know you'll be using only pure EABI user space then you 16366c90c872SNicolas Pitre can say N here. If this option is not selected and you attempt 16376c90c872SNicolas Pitre to execute a legacy ABI binary then the result will be 16386c90c872SNicolas Pitre UNPREDICTABLE (in fact it can be predicted that it won't work 1639b02f8467SKees Cook at all). If in doubt say N. 16406c90c872SNicolas Pitre 1641eb33575cSMel Gormanconfig ARCH_HAS_HOLES_MEMORYMODEL 1642e80d6a24SMel Gorman bool 1643e80d6a24SMel Gorman 164405944d74SRussell Kingconfig ARCH_SPARSEMEM_ENABLE 164505944d74SRussell King bool 164605944d74SRussell King 164707a2f737SRussell Kingconfig ARCH_SPARSEMEM_DEFAULT 164807a2f737SRussell King def_bool ARCH_SPARSEMEM_ENABLE 164907a2f737SRussell King 165005944d74SRussell Kingconfig ARCH_SELECT_MEMORY_MODEL 1651be370302SRussell King def_bool ARCH_SPARSEMEM_ENABLE 1652c80d79d7SYasunori Goto 16537b7bf499SWill Deaconconfig HAVE_ARCH_PFN_VALID 16547b7bf499SWill Deacon def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 16557b7bf499SWill Deacon 1656053a96caSNicolas Pitreconfig HIGHMEM 1657e8db89a2SRussell King bool "High Memory Support" 1658e8db89a2SRussell King depends on MMU 1659053a96caSNicolas Pitre help 1660053a96caSNicolas Pitre The address space of ARM processors is only 4 Gigabytes large 1661053a96caSNicolas Pitre and it has to accommodate user address space, kernel address 1662053a96caSNicolas Pitre space as well as some memory mapped IO. That means that, if you 1663053a96caSNicolas Pitre have a large amount of physical memory and/or IO, not all of the 1664053a96caSNicolas Pitre memory can be "permanently mapped" by the kernel. The physical 1665053a96caSNicolas Pitre memory that is not permanently mapped is called "high memory". 1666053a96caSNicolas Pitre 1667053a96caSNicolas Pitre Depending on the selected kernel/user memory split, minimum 1668053a96caSNicolas Pitre vmalloc space and actual amount of RAM, you may not need this 1669053a96caSNicolas Pitre option which should result in a slightly faster kernel. 1670053a96caSNicolas Pitre 1671053a96caSNicolas Pitre If unsure, say n. 1672053a96caSNicolas Pitre 167365cec8e3SRussell Kingconfig HIGHPTE 167465cec8e3SRussell King bool "Allocate 2nd-level pagetables from highmem" 167565cec8e3SRussell King depends on HIGHMEM 167665cec8e3SRussell King 16771b8873a0SJamie Ilesconfig HW_PERF_EVENTS 16781b8873a0SJamie Iles bool "Enable hardware performance counter support for perf events" 1679f0d1bc47SWill Deacon depends on PERF_EVENTS 16801b8873a0SJamie Iles default y 16811b8873a0SJamie Iles help 16821b8873a0SJamie Iles Enable hardware performance counter support for perf events. If 16831b8873a0SJamie Iles disabled, perf events will use software events only. 16841b8873a0SJamie Iles 16851355e2a6SCatalin Marinasconfig SYS_SUPPORTS_HUGETLBFS 16861355e2a6SCatalin Marinas def_bool y 16871355e2a6SCatalin Marinas depends on ARM_LPAE 16881355e2a6SCatalin Marinas 16898d962507SCatalin Marinasconfig HAVE_ARCH_TRANSPARENT_HUGEPAGE 16908d962507SCatalin Marinas def_bool y 16918d962507SCatalin Marinas depends on ARM_LPAE 16928d962507SCatalin Marinas 16934bfab203SSteven Capperconfig ARCH_WANT_GENERAL_HUGETLB 16944bfab203SSteven Capper def_bool y 16954bfab203SSteven Capper 16963f22ab27SDave Hansensource "mm/Kconfig" 16973f22ab27SDave Hansen 1698c1b2d970SMagnus Dammconfig FORCE_MAX_ZONEORDER 1699bf98c1eaSLaurent Pinchart int "Maximum zone order" if ARCH_SHMOBILE_LEGACY 1700bf98c1eaSLaurent Pinchart range 11 64 if ARCH_SHMOBILE_LEGACY 1701898f08e1SYegor Yefremov default "12" if SOC_AM33XX 17026d85e2b0SUwe Kleine-König default "9" if SA1111 || ARCH_EFM32 1703c1b2d970SMagnus Damm default "11" 1704c1b2d970SMagnus Damm help 1705c1b2d970SMagnus Damm The kernel memory allocator divides physically contiguous memory 1706c1b2d970SMagnus Damm blocks into "zones", where each zone is a power of two number of 1707c1b2d970SMagnus Damm pages. This option selects the largest power of two that the kernel 1708c1b2d970SMagnus Damm keeps in the memory allocator. If you need to allocate very large 1709c1b2d970SMagnus Damm blocks of physically contiguous memory, then you may need to 1710c1b2d970SMagnus Damm increase this value. 1711c1b2d970SMagnus Damm 1712c1b2d970SMagnus Damm This config option is actually maximum order plus one. For example, 1713c1b2d970SMagnus Damm a value of 11 means that the largest free memory block is 2^10 pages. 1714c1b2d970SMagnus Damm 17151da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP 17161da177e4SLinus Torvalds bool 1717f12d0d7cSHyok S. Choi depends on CPU_CP15_MMU 17181da177e4SLinus Torvalds default y if !ARCH_EBSA110 1719e119bfffSRussell King select HAVE_PROC_CPU if PROC_FS 17201da177e4SLinus Torvalds help 17211da177e4SLinus Torvalds ARM processors cannot fetch/store information which is not 17221da177e4SLinus Torvalds naturally aligned on the bus, i.e., a 4 byte fetch must start at an 17231da177e4SLinus Torvalds address divisible by 4. On 32-bit ARM processors, these non-aligned 17241da177e4SLinus Torvalds fetch/store instructions will be emulated in software if you say 17251da177e4SLinus Torvalds here, which has a severe performance impact. This is necessary for 17261da177e4SLinus Torvalds correct operation of some network protocols. With an IP-only 17271da177e4SLinus Torvalds configuration it is safe to say N, otherwise say Y. 17281da177e4SLinus Torvalds 172939ec58f3SLennert Buytenhekconfig UACCESS_WITH_MEMCPY 173038ef2ad5SLinus Walleij bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()" 173138ef2ad5SLinus Walleij depends on MMU 173239ec58f3SLennert Buytenhek default y if CPU_FEROCEON 173339ec58f3SLennert Buytenhek help 173439ec58f3SLennert Buytenhek Implement faster copy_to_user and clear_user methods for CPU 173539ec58f3SLennert Buytenhek cores where a 8-word STM instruction give significantly higher 173639ec58f3SLennert Buytenhek memory write throughput than a sequence of individual 32bit stores. 173739ec58f3SLennert Buytenhek 173839ec58f3SLennert Buytenhek A possible side effect is a slight increase in scheduling latency 173939ec58f3SLennert Buytenhek between threads sharing the same address space if they invoke 174039ec58f3SLennert Buytenhek such copy operations with large buffers. 174139ec58f3SLennert Buytenhek 174239ec58f3SLennert Buytenhek However, if the CPU data cache is using a write-allocate mode, 174339ec58f3SLennert Buytenhek this option is unlikely to provide any performance gain. 174439ec58f3SLennert Buytenhek 174570c70d97SNicolas Pitreconfig SECCOMP 174670c70d97SNicolas Pitre bool 174770c70d97SNicolas Pitre prompt "Enable seccomp to safely compute untrusted bytecode" 174870c70d97SNicolas Pitre ---help--- 174970c70d97SNicolas Pitre This kernel feature is useful for number crunching applications 175070c70d97SNicolas Pitre that may need to compute untrusted bytecode during their 175170c70d97SNicolas Pitre execution. By using pipes or other transports made available to 175270c70d97SNicolas Pitre the process as file descriptors supporting the read/write 175370c70d97SNicolas Pitre syscalls, it's possible to isolate those applications in 175470c70d97SNicolas Pitre their own address space using seccomp. Once seccomp is 175570c70d97SNicolas Pitre enabled via prctl(PR_SET_SECCOMP), it cannot be disabled 175670c70d97SNicolas Pitre and the task is only allowed to execute a few safe syscalls 175770c70d97SNicolas Pitre defined by each seccomp mode. 175870c70d97SNicolas Pitre 175906e6295bSStefano Stabelliniconfig SWIOTLB 176006e6295bSStefano Stabellini def_bool y 176106e6295bSStefano Stabellini 176206e6295bSStefano Stabelliniconfig IOMMU_HELPER 176306e6295bSStefano Stabellini def_bool SWIOTLB 176406e6295bSStefano Stabellini 1765eff8d644SStefano Stabelliniconfig XEN_DOM0 1766eff8d644SStefano Stabellini def_bool y 1767eff8d644SStefano Stabellini depends on XEN 1768eff8d644SStefano Stabellini 1769eff8d644SStefano Stabelliniconfig XEN 1770eff8d644SStefano Stabellini bool "Xen guest support on ARM (EXPERIMENTAL)" 177185323a99SIan Campbell depends on ARM && AEABI && OF 1772f880b67dSArnd Bergmann depends on CPU_V7 && !CPU_V6 177385323a99SIan Campbell depends on !GENERIC_ATOMIC64 17747693deccSUwe Kleine-König depends on MMU 177551aaf81fSRussell King select ARCH_DMA_ADDR_T_64BIT 177617b7ab80SStefano Stabellini select ARM_PSCI 177783862ccfSStefano Stabellini select SWIOTLB_XEN 1778eff8d644SStefano Stabellini help 1779eff8d644SStefano Stabellini Say Y if you want to run Linux in a Virtual Machine on Xen on ARM. 1780eff8d644SStefano Stabellini 17811da177e4SLinus Torvaldsendmenu 17821da177e4SLinus Torvalds 17831da177e4SLinus Torvaldsmenu "Boot options" 17841da177e4SLinus Torvalds 17859eb8f674SGrant Likelyconfig USE_OF 17869eb8f674SGrant Likely bool "Flattened Device Tree support" 1787b1b3f49cSRussell King select IRQ_DOMAIN 17889eb8f674SGrant Likely select OF 17899eb8f674SGrant Likely select OF_EARLY_FLATTREE 1790bcedb5f9SMarek Szyprowski select OF_RESERVED_MEM 17919eb8f674SGrant Likely help 17929eb8f674SGrant Likely Include support for flattened device tree machine descriptions. 17939eb8f674SGrant Likely 1794bd51e2f5SNicolas Pitreconfig ATAGS 1795bd51e2f5SNicolas Pitre bool "Support for the traditional ATAGS boot data passing" if USE_OF 1796bd51e2f5SNicolas Pitre default y 1797bd51e2f5SNicolas Pitre help 1798bd51e2f5SNicolas Pitre This is the traditional way of passing data to the kernel at boot 1799bd51e2f5SNicolas Pitre time. If you are solely relying on the flattened device tree (or 1800bd51e2f5SNicolas Pitre the ARM_ATAG_DTB_COMPAT option) then you may unselect this option 1801bd51e2f5SNicolas Pitre to remove ATAGS support from your kernel binary. If unsure, 1802bd51e2f5SNicolas Pitre leave this to y. 1803bd51e2f5SNicolas Pitre 1804bd51e2f5SNicolas Pitreconfig DEPRECATED_PARAM_STRUCT 1805bd51e2f5SNicolas Pitre bool "Provide old way to pass kernel parameters" 1806bd51e2f5SNicolas Pitre depends on ATAGS 1807bd51e2f5SNicolas Pitre help 1808bd51e2f5SNicolas Pitre This was deprecated in 2001 and announced to live on for 5 years. 1809bd51e2f5SNicolas Pitre Some old boot loaders still use this way. 1810bd51e2f5SNicolas Pitre 18111da177e4SLinus Torvalds# Compressed boot loader in ROM. Yes, we really want to ask about 18121da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files. 18131da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT 18141da177e4SLinus Torvalds hex "Compressed ROM boot loader base address" 18151da177e4SLinus Torvalds default "0" 18161da177e4SLinus Torvalds help 18171da177e4SLinus Torvalds The physical address at which the ROM-able zImage is to be 18181da177e4SLinus Torvalds placed in the target. Platforms which normally make use of 18191da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 18201da177e4SLinus Torvalds value in their defconfig file. 18211da177e4SLinus Torvalds 18221da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS 18251da177e4SLinus Torvalds hex "Compressed ROM boot loader BSS address" 18261da177e4SLinus Torvalds default "0" 18271da177e4SLinus Torvalds help 1828f8c440b2SDan Fandrich The base address of an area of read/write memory in the target 1829f8c440b2SDan Fandrich for the ROM-able zImage which must be available while the 1830f8c440b2SDan Fandrich decompressor is running. It must be large enough to hold the 1831f8c440b2SDan Fandrich entire decompressed kernel plus an additional 128 KiB. 1832f8c440b2SDan Fandrich Platforms which normally make use of ROM-able zImage formats 1833f8c440b2SDan Fandrich normally set this to a suitable value in their defconfig file. 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 18361da177e4SLinus Torvalds 18371da177e4SLinus Torvaldsconfig ZBOOT_ROM 18381da177e4SLinus Torvalds bool "Compressed boot loader in ROM/flash" 18391da177e4SLinus Torvalds depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 184010968131SRussell King depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR 18411da177e4SLinus Torvalds help 18421da177e4SLinus Torvalds Say Y here if you intend to execute your compressed kernel image 18431da177e4SLinus Torvalds (zImage) directly from ROM or flash. If unsure, say N. 18441da177e4SLinus Torvalds 1845090ab3ffSSimon Hormanchoice 1846090ab3ffSSimon Horman prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)" 1847d6f94fa0SKees Cook depends on ZBOOT_ROM && ARCH_SH7372 1848090ab3ffSSimon Horman default ZBOOT_ROM_NONE 1849090ab3ffSSimon Horman help 1850090ab3ffSSimon Horman Include experimental SD/MMC loading code in the ROM-able zImage. 185159bf8964SMasanari Iida With this enabled it is possible to write the ROM-able zImage 1852090ab3ffSSimon Horman kernel image to an MMC or SD card and boot the kernel straight 1853090ab3ffSSimon Horman from the reset vector. At reset the processor Mask ROM will load 185459bf8964SMasanari Iida the first part of the ROM-able zImage which in turn loads the 1855090ab3ffSSimon Horman rest the kernel image to RAM. 1856090ab3ffSSimon Horman 1857090ab3ffSSimon Hormanconfig ZBOOT_ROM_NONE 1858090ab3ffSSimon Horman bool "No SD/MMC loader in zImage (EXPERIMENTAL)" 1859090ab3ffSSimon Horman help 1860090ab3ffSSimon Horman Do not load image from SD or MMC 1861090ab3ffSSimon Horman 1862f45b1149SSimon Hormanconfig ZBOOT_ROM_MMCIF 1863f45b1149SSimon Horman bool "Include MMCIF loader in zImage (EXPERIMENTAL)" 1864f45b1149SSimon Horman help 1865090ab3ffSSimon Horman Load image from MMCIF hardware block. 1866090ab3ffSSimon Horman 1867090ab3ffSSimon Hormanconfig ZBOOT_ROM_SH_MOBILE_SDHI 1868090ab3ffSSimon Horman bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)" 1869090ab3ffSSimon Horman help 1870090ab3ffSSimon Horman Load image from SDHI hardware block 1871090ab3ffSSimon Horman 1872090ab3ffSSimon Hormanendchoice 1873f45b1149SSimon Horman 1874e2a6a3aaSJohn Bonesioconfig ARM_APPENDED_DTB 1875e2a6a3aaSJohn Bonesio bool "Use appended device tree blob to zImage (EXPERIMENTAL)" 187610968131SRussell King depends on OF 1877e2a6a3aaSJohn Bonesio help 1878e2a6a3aaSJohn Bonesio With this option, the boot code will look for a device tree binary 1879e2a6a3aaSJohn Bonesio (DTB) appended to zImage 1880e2a6a3aaSJohn Bonesio (e.g. cat zImage <filename>.dtb > zImage_w_dtb). 1881e2a6a3aaSJohn Bonesio 1882e2a6a3aaSJohn Bonesio This is meant as a backward compatibility convenience for those 1883e2a6a3aaSJohn Bonesio systems with a bootloader that can't be upgraded to accommodate 1884e2a6a3aaSJohn Bonesio the documented boot protocol using a device tree. 1885e2a6a3aaSJohn Bonesio 1886e2a6a3aaSJohn Bonesio Beware that there is very little in terms of protection against 1887e2a6a3aaSJohn Bonesio this option being confused by leftover garbage in memory that might 1888e2a6a3aaSJohn Bonesio look like a DTB header after a reboot if no actual DTB is appended 1889e2a6a3aaSJohn Bonesio to zImage. Do not leave this option active in a production kernel 1890e2a6a3aaSJohn Bonesio if you don't intend to always append a DTB. Proper passing of the 1891e2a6a3aaSJohn Bonesio location into r2 of a bootloader provided DTB is always preferable 1892e2a6a3aaSJohn Bonesio to this option. 1893e2a6a3aaSJohn Bonesio 1894b90b9a38SNicolas Pitreconfig ARM_ATAG_DTB_COMPAT 1895b90b9a38SNicolas Pitre bool "Supplement the appended DTB with traditional ATAG information" 1896b90b9a38SNicolas Pitre depends on ARM_APPENDED_DTB 1897b90b9a38SNicolas Pitre help 1898b90b9a38SNicolas Pitre Some old bootloaders can't be updated to a DTB capable one, yet 1899b90b9a38SNicolas Pitre they provide ATAGs with memory configuration, the ramdisk address, 1900b90b9a38SNicolas Pitre the kernel cmdline string, etc. Such information is dynamically 1901b90b9a38SNicolas Pitre provided by the bootloader and can't always be stored in a static 1902b90b9a38SNicolas Pitre DTB. To allow a device tree enabled kernel to be used with such 1903b90b9a38SNicolas Pitre bootloaders, this option allows zImage to extract the information 1904b90b9a38SNicolas Pitre from the ATAG list and store it at run time into the appended DTB. 1905b90b9a38SNicolas Pitre 1906d0f34a11SGenoud Richardchoice 1907d0f34a11SGenoud Richard prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT 1908d0f34a11SGenoud Richard default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER 1909d0f34a11SGenoud Richard 1910d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER 1911d0f34a11SGenoud Richard bool "Use bootloader kernel arguments if available" 1912d0f34a11SGenoud Richard help 1913d0f34a11SGenoud Richard Uses the command-line options passed by the boot loader instead of 1914d0f34a11SGenoud Richard the device tree bootargs property. If the boot loader doesn't provide 1915d0f34a11SGenoud Richard any, the device tree bootargs property will be used. 1916d0f34a11SGenoud Richard 1917d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND 1918d0f34a11SGenoud Richard bool "Extend with bootloader kernel arguments" 1919d0f34a11SGenoud Richard help 1920d0f34a11SGenoud Richard The command-line arguments provided by the boot loader will be 1921d0f34a11SGenoud Richard appended to the the device tree bootargs property. 1922d0f34a11SGenoud Richard 1923d0f34a11SGenoud Richardendchoice 1924d0f34a11SGenoud Richard 19251da177e4SLinus Torvaldsconfig CMDLINE 19261da177e4SLinus Torvalds string "Default kernel command string" 19271da177e4SLinus Torvalds default "" 19281da177e4SLinus Torvalds help 19291da177e4SLinus Torvalds On some architectures (EBSA110 and CATS), there is currently no way 19301da177e4SLinus Torvalds for the boot loader to pass arguments to the kernel. For these 19311da177e4SLinus Torvalds architectures, you should supply some command-line options at build 19321da177e4SLinus Torvalds time by entering them here. As a minimum, you should specify the 19331da177e4SLinus Torvalds memory size and the root device (e.g., mem=64M root=/dev/nfs). 19341da177e4SLinus Torvalds 19354394c124SVictor Boiviechoice 19364394c124SVictor Boivie prompt "Kernel command line type" if CMDLINE != "" 19374394c124SVictor Boivie default CMDLINE_FROM_BOOTLOADER 1938bd51e2f5SNicolas Pitre depends on ATAGS 19394394c124SVictor Boivie 19404394c124SVictor Boivieconfig CMDLINE_FROM_BOOTLOADER 19414394c124SVictor Boivie bool "Use bootloader kernel arguments if available" 19424394c124SVictor Boivie help 19434394c124SVictor Boivie Uses the command-line options passed by the boot loader. If 19444394c124SVictor Boivie the boot loader doesn't provide any, the default kernel command 19454394c124SVictor Boivie string provided in CMDLINE will be used. 19464394c124SVictor Boivie 19474394c124SVictor Boivieconfig CMDLINE_EXTEND 19484394c124SVictor Boivie bool "Extend bootloader kernel arguments" 19494394c124SVictor Boivie help 19504394c124SVictor Boivie The command-line arguments provided by the boot loader will be 19514394c124SVictor Boivie appended to the default kernel command string. 19524394c124SVictor Boivie 195392d2040dSAlexander Hollerconfig CMDLINE_FORCE 195492d2040dSAlexander Holler bool "Always use the default kernel command string" 195592d2040dSAlexander Holler help 195692d2040dSAlexander Holler Always use the default kernel command string, even if the boot 195792d2040dSAlexander Holler loader passes other arguments to the kernel. 195892d2040dSAlexander Holler This is useful if you cannot or don't want to change the 195992d2040dSAlexander Holler command-line options your boot loader passes to the kernel. 19604394c124SVictor Boivieendchoice 196192d2040dSAlexander Holler 19621da177e4SLinus Torvaldsconfig XIP_KERNEL 19631da177e4SLinus Torvalds bool "Kernel Execute-In-Place from ROM" 196410968131SRussell King depends on !ARM_LPAE && !ARCH_MULTIPLATFORM 19651da177e4SLinus Torvalds help 19661da177e4SLinus Torvalds Execute-In-Place allows the kernel to run from non-volatile storage 19671da177e4SLinus Torvalds directly addressable by the CPU, such as NOR flash. This saves RAM 19681da177e4SLinus Torvalds space since the text section of the kernel is not loaded from flash 19691da177e4SLinus Torvalds to RAM. Read-write sections, such as the data section and stack, 19701da177e4SLinus Torvalds are still copied to RAM. The XIP kernel is not compressed since 19711da177e4SLinus Torvalds it has to run directly from flash, so it will take more space to 19721da177e4SLinus Torvalds store it. The flash address used to link the kernel object files, 19731da177e4SLinus Torvalds and for storing it, is configuration dependent. Therefore, if you 19741da177e4SLinus Torvalds say Y here, you must know the proper physical address where to 19751da177e4SLinus Torvalds store the kernel image depending on your own flash memory usage. 19761da177e4SLinus Torvalds 19771da177e4SLinus Torvalds Also note that the make target becomes "make xipImage" rather than 19781da177e4SLinus Torvalds "make zImage" or "make Image". The final kernel binary to put in 19791da177e4SLinus Torvalds ROM memory will be arch/arm/boot/xipImage. 19801da177e4SLinus Torvalds 19811da177e4SLinus Torvalds If unsure, say N. 19821da177e4SLinus Torvalds 19831da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR 19841da177e4SLinus Torvalds hex "XIP Kernel Physical Location" 19851da177e4SLinus Torvalds depends on XIP_KERNEL 19861da177e4SLinus Torvalds default "0x00080000" 19871da177e4SLinus Torvalds help 19881da177e4SLinus Torvalds This is the physical address in your flash memory the kernel will 19891da177e4SLinus Torvalds be linked for and stored to. This address is dependent on your 19901da177e4SLinus Torvalds own flash usage. 19911da177e4SLinus Torvalds 1992c587e4a6SRichard Purdieconfig KEXEC 1993c587e4a6SRichard Purdie bool "Kexec system call (EXPERIMENTAL)" 199419ab428fSStephen Warren depends on (!SMP || PM_SLEEP_SMP) 1995c587e4a6SRichard Purdie help 1996c587e4a6SRichard Purdie kexec is a system call that implements the ability to shutdown your 1997c587e4a6SRichard Purdie current kernel, and to start another kernel. It is like a reboot 199801dd2fbfSMatt LaPlante but it is independent of the system firmware. And like a reboot 1999c587e4a6SRichard Purdie you can start any kernel with it, not just Linux. 2000c587e4a6SRichard Purdie 2001c587e4a6SRichard Purdie It is an ongoing process to be certain the hardware in a machine 2002c587e4a6SRichard Purdie is properly shutdown, so do not be surprised if this code does not 2003bf220695SGeert Uytterhoeven initially work for you. 2004c587e4a6SRichard Purdie 20054cd9d6f7SRichard Purdieconfig ATAGS_PROC 20064cd9d6f7SRichard Purdie bool "Export atags in procfs" 2007bd51e2f5SNicolas Pitre depends on ATAGS && KEXEC 2008b98d7291SUli Luckas default y 20094cd9d6f7SRichard Purdie help 20104cd9d6f7SRichard Purdie Should the atags used to boot the kernel be exported in an "atags" 20114cd9d6f7SRichard Purdie file in procfs. Useful with kexec. 20124cd9d6f7SRichard Purdie 2013cb5d39b3SMika Westerbergconfig CRASH_DUMP 2014cb5d39b3SMika Westerberg bool "Build kdump crash kernel (EXPERIMENTAL)" 2015cb5d39b3SMika Westerberg help 2016cb5d39b3SMika Westerberg Generate crash dump after being started by kexec. This should 2017cb5d39b3SMika Westerberg be normally only set in special crash dump kernels which are 2018cb5d39b3SMika Westerberg loaded in the main kernel with kexec-tools into a specially 2019cb5d39b3SMika Westerberg reserved region and then later executed after a crash by 2020cb5d39b3SMika Westerberg kdump/kexec. The crash dump kernel must be compiled to a 2021cb5d39b3SMika Westerberg memory address not used by the main kernel 2022cb5d39b3SMika Westerberg 2023cb5d39b3SMika Westerberg For more details see Documentation/kdump/kdump.txt 2024cb5d39b3SMika Westerberg 2025e69edc79SEric Miaoconfig AUTO_ZRELADDR 2026e69edc79SEric Miao bool "Auto calculation of the decompressed kernel image address" 2027e69edc79SEric Miao help 2028e69edc79SEric Miao ZRELADDR is the physical address where the decompressed kernel 2029e69edc79SEric Miao image will be placed. If AUTO_ZRELADDR is selected, the address 2030e69edc79SEric Miao will be determined at run-time by masking the current IP with 2031e69edc79SEric Miao 0xf8000000. This assumes the zImage being placed in the first 128MB 2032e69edc79SEric Miao from start of memory. 2033e69edc79SEric Miao 20341da177e4SLinus Torvaldsendmenu 20351da177e4SLinus Torvalds 2036ac9d7efcSRussell Kingmenu "CPU Power Management" 20371da177e4SLinus Torvalds 20381da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig" 20391da177e4SLinus Torvalds 2040ac9d7efcSRussell Kingsource "drivers/cpuidle/Kconfig" 2041ac9d7efcSRussell King 2042ac9d7efcSRussell Kingendmenu 2043ac9d7efcSRussell King 20441da177e4SLinus Torvaldsmenu "Floating point emulation" 20451da177e4SLinus Torvalds 20461da177e4SLinus Torvaldscomment "At least one emulation must be selected" 20471da177e4SLinus Torvalds 20481da177e4SLinus Torvaldsconfig FPE_NWFPE 20491da177e4SLinus Torvalds bool "NWFPE math emulation" 2050593c252aSDave Martin depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL 20511da177e4SLinus Torvalds ---help--- 20521da177e4SLinus Torvalds Say Y to include the NWFPE floating point emulator in the kernel. 20531da177e4SLinus Torvalds This is necessary to run most binaries. Linux does not currently 20541da177e4SLinus Torvalds support floating point hardware so you need to say Y here even if 20551da177e4SLinus Torvalds your machine has an FPA or floating point co-processor podule. 20561da177e4SLinus Torvalds 20571da177e4SLinus Torvalds You may say N here if you are going to load the Acorn FPEmulator 20581da177e4SLinus Torvalds early in the bootup. 20591da177e4SLinus Torvalds 20601da177e4SLinus Torvaldsconfig FPE_NWFPE_XP 20611da177e4SLinus Torvalds bool "Support extended precision" 2062bedf142bSLennert Buytenhek depends on FPE_NWFPE 20631da177e4SLinus Torvalds help 20641da177e4SLinus Torvalds Say Y to include 80-bit support in the kernel floating-point 20651da177e4SLinus Torvalds emulator. Otherwise, only 32 and 64-bit support is compiled in. 20661da177e4SLinus Torvalds Note that gcc does not generate 80-bit operations by default, 20671da177e4SLinus Torvalds so in most cases this option only enlarges the size of the 20681da177e4SLinus Torvalds floating point emulator without any good reason. 20691da177e4SLinus Torvalds 20701da177e4SLinus Torvalds You almost surely want to say N here. 20711da177e4SLinus Torvalds 20721da177e4SLinus Torvaldsconfig FPE_FASTFPE 20731da177e4SLinus Torvalds bool "FastFPE math emulation (EXPERIMENTAL)" 2074d6f94fa0SKees Cook depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 20751da177e4SLinus Torvalds ---help--- 20761da177e4SLinus Torvalds Say Y here to include the FAST floating point emulator in the kernel. 20771da177e4SLinus Torvalds This is an experimental much faster emulator which now also has full 20781da177e4SLinus Torvalds precision for the mantissa. It does not support any exceptions. 20791da177e4SLinus Torvalds It is very simple, and approximately 3-6 times faster than NWFPE. 20801da177e4SLinus Torvalds 20811da177e4SLinus Torvalds It should be sufficient for most programs. It may be not suitable 20821da177e4SLinus Torvalds for scientific calculations, but you have to check this for yourself. 20831da177e4SLinus Torvalds If you do not feel you need a faster FP emulation you should better 20841da177e4SLinus Torvalds choose NWFPE. 20851da177e4SLinus Torvalds 20861da177e4SLinus Torvaldsconfig VFP 20871da177e4SLinus Torvalds bool "VFP-format floating point maths" 2088e399b1a4SRussell King depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 20891da177e4SLinus Torvalds help 20901da177e4SLinus Torvalds Say Y to include VFP support code in the kernel. This is needed 20911da177e4SLinus Torvalds if your hardware includes a VFP unit. 20921da177e4SLinus Torvalds 20931da177e4SLinus Torvalds Please see <file:Documentation/arm/VFP/release-notes.txt> for 20941da177e4SLinus Torvalds release notes and additional status information. 20951da177e4SLinus Torvalds 20961da177e4SLinus Torvalds Say N if your target does not have VFP hardware. 20971da177e4SLinus Torvalds 209825ebee02SCatalin Marinasconfig VFPv3 209925ebee02SCatalin Marinas bool 210025ebee02SCatalin Marinas depends on VFP 210125ebee02SCatalin Marinas default y if CPU_V7 210225ebee02SCatalin Marinas 2103b5872db4SCatalin Marinasconfig NEON 2104b5872db4SCatalin Marinas bool "Advanced SIMD (NEON) Extension support" 2105b5872db4SCatalin Marinas depends on VFPv3 && CPU_V7 2106b5872db4SCatalin Marinas help 2107b5872db4SCatalin Marinas Say Y to include support code for NEON, the ARMv7 Advanced SIMD 2108b5872db4SCatalin Marinas Extension. 2109b5872db4SCatalin Marinas 211073c132c1SArd Biesheuvelconfig KERNEL_MODE_NEON 211173c132c1SArd Biesheuvel bool "Support for NEON in kernel mode" 2112c4a30c3bSRussell King depends on NEON && AEABI 211373c132c1SArd Biesheuvel help 211473c132c1SArd Biesheuvel Say Y to include support for NEON in kernel mode. 211573c132c1SArd Biesheuvel 21161da177e4SLinus Torvaldsendmenu 21171da177e4SLinus Torvalds 21181da177e4SLinus Torvaldsmenu "Userspace binary formats" 21191da177e4SLinus Torvalds 21201da177e4SLinus Torvaldssource "fs/Kconfig.binfmt" 21211da177e4SLinus Torvalds 21221da177e4SLinus Torvaldsconfig ARTHUR 21231da177e4SLinus Torvalds tristate "RISC OS personality" 2124704bdda0SNicolas Pitre depends on !AEABI 21251da177e4SLinus Torvalds help 21261da177e4SLinus Torvalds Say Y here to include the kernel code necessary if you want to run 21271da177e4SLinus Torvalds Acorn RISC OS/Arthur binaries under Linux. This code is still very 21281da177e4SLinus Torvalds experimental; if this sounds frightening, say N and sleep in peace. 21291da177e4SLinus Torvalds You can also say M here to compile this support as a module (which 21301da177e4SLinus Torvalds will be called arthur). 21311da177e4SLinus Torvalds 21321da177e4SLinus Torvaldsendmenu 21331da177e4SLinus Torvalds 21341da177e4SLinus Torvaldsmenu "Power management options" 21351da177e4SLinus Torvalds 2136eceab4acSRussell Kingsource "kernel/power/Kconfig" 21371da177e4SLinus Torvalds 2138f4cb5700SJohannes Bergconfig ARCH_SUSPEND_POSSIBLE 213919a0519dSEzequiel Garcia depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \ 2140f0d75153SUwe Kleine-König CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK 2141f4cb5700SJohannes Berg def_bool y 2142f4cb5700SJohannes Berg 214315e0d9e3SArnd Bergmannconfig ARM_CPU_SUSPEND 214415e0d9e3SArnd Bergmann def_bool PM_SLEEP 214515e0d9e3SArnd Bergmann 2146603fb42aSSebastian Capellaconfig ARCH_HIBERNATION_POSSIBLE 2147603fb42aSSebastian Capella bool 2148603fb42aSSebastian Capella depends on MMU 2149603fb42aSSebastian Capella default y if ARCH_SUSPEND_POSSIBLE 2150603fb42aSSebastian Capella 21511da177e4SLinus Torvaldsendmenu 21521da177e4SLinus Torvalds 2153d5950b43SSam Ravnborgsource "net/Kconfig" 2154d5950b43SSam Ravnborg 2155ac25150fSUwe Kleine-Königsource "drivers/Kconfig" 21561da177e4SLinus Torvalds 21571da177e4SLinus Torvaldssource "fs/Kconfig" 21581da177e4SLinus Torvalds 21591da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug" 21601da177e4SLinus Torvalds 21611da177e4SLinus Torvaldssource "security/Kconfig" 21621da177e4SLinus Torvalds 21631da177e4SLinus Torvaldssource "crypto/Kconfig" 21641da177e4SLinus Torvalds 21651da177e4SLinus Torvaldssource "lib/Kconfig" 2166749cf76cSChristoffer Dall 2167749cf76cSChristoffer Dallsource "arch/arm/kvm/Kconfig" 2168