diff -Nur linux-4.6.2/arch/.gitignore linux-4.6.2.riscv/arch/.gitignore
--- linux-4.6.2/arch/.gitignore	2016-06-08 03:23:53.000000000 +0200
+++ linux-4.6.2.riscv/arch/.gitignore	2017-03-04 02:48:34.162887952 +0100
@@ -1,2 +1,3 @@
-i386
-x86_64
+# In ../, we ignored everything, so suppress that.
+!riscv/
+
diff -Nur linux-4.6.2/arch/riscv/configs/riscv64_qemu linux-4.6.2.riscv/arch/riscv/configs/riscv64_qemu
--- linux-4.6.2/arch/riscv/configs/riscv64_qemu	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/configs/riscv64_qemu	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1,64 @@
+# CONFIG_COMPACTION is not set
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_HZ_100=y
+CONFIG_CROSS_COMPILE="riscv64-unknown-linux-gnu-"
+CONFIG_DEFAULT_HOSTNAME="ucbvax"
+CONFIG_NAMESPACES=y
+CONFIG_EMBEDDED=y
+# CONFIG_BLK_DEV_BSG is not set
+CONFIG_PARTITION_ADVANCED=y
+# CONFIG_IOSCHED_DEADLINE is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_LRO is not set
+# CONFIG_INET_DIAG is not set
+# CONFIG_IPV6 is not set
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+# CONFIG_BLK_DEV is not set
+CONFIG_SCSI=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_SCSI_VIRTIO=y
+CONFIG_NETDEVICES=y
+CONFIG_VIRTIO_NET=y
+# CONFIG_ETHERNET is not set
+# CONFIG_WLAN is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_VT is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=1
+CONFIG_SERIAL_8250_RUNTIME_UARTS=1
+CONFIG_VIRTIO_CONSOLE=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+# CONFIG_USB_SUPPORT is not set
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT4_FS=y
+# CONFIG_FILE_LOCKING is not set
+# CONFIG_DNOTIFY is not set
+# CONFIG_INOTIFY_USER is not set
+# CONFIG_PROC_PAGE_MONITOR is not set
+CONFIG_TMPFS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+# CONFIG_NETWORK_FILESYSTEMS is not set
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="virtio_mmio.device=0x200@0x400:1 virtio_mmio.device=0x200@0x600:2 virtio_mmio.device=0x200@0x800:3 lpj=100000"
+CONFIG_CMDLINE_OVERRIDE=y
+CONFIG_PRINTK_TIME=y
+CONFIG_DEBUG_SECTION_MISMATCH=y
+# CONFIG_CRYPTO_ANSI_CPRNG is not set
+# CONFIG_CRYPTO_HW is not set
diff -Nur linux-4.6.2/arch/riscv/configs/riscv64_spike linux-4.6.2.riscv/arch/riscv/configs/riscv64_spike
--- linux-4.6.2/arch/riscv/configs/riscv64_spike	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/configs/riscv64_spike	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1,929 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Linux/riscv 3.14.29 Kernel Configuration
+#
+CONFIG_RISCV=y
+CONFIG_MMU=y
+CONFIG_PCI=y
+CONFIG_STACKTRACE_SUPPORT=y
+CONFIG_RWSEM_GENERIC_SPINLOCK=y
+CONFIG_GENERIC_BUG=y
+CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
+CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_GENERIC_CSUM=y
+CONFIG_GENERIC_HWEIGHT=y
+
+#
+# Platform type
+#
+CONFIG_CPU_RV_ROCKET=y
+# CONFIG_CPU_RV_GENERIC is not set
+CONFIG_CPU_SUPPORTS_64BIT_KERNEL=y
+CONFIG_RV_ATOMIC=y
+# CONFIG_RV_SYSRISCV_ATOMIC is not set
+CONFIG_SBI_CONSOLE=y
+
+#
+# Kernel type
+#
+CONFIG_64BIT=y
+CONFIG_FLATMEM=y
+CONFIG_FLAT_NODE_MEM_MAP=y
+CONFIG_HAVE_MEMBLOCK=y
+CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
+# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
+CONFIG_PAGEFLAGS_EXTENDED=y
+CONFIG_SPLIT_PTLOCK_CPUS=4
+# CONFIG_COMPACTION is not set
+CONFIG_PHYS_ADDR_T_64BIT=y
+CONFIG_ZONE_DMA_FLAG=0
+# CONFIG_KSM is not set
+CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NEED_PER_CPU_KM=y
+# CONFIG_CLEANCACHE is not set
+# CONFIG_FRONTSWAP is not set
+# CONFIG_CMA is not set
+# CONFIG_ZBUD is not set
+# CONFIG_ZSMALLOC is not set
+CONFIG_PREEMPT_NONE=y
+# CONFIG_PREEMPT_VOLUNTARY is not set
+# CONFIG_PREEMPT is not set
+CONFIG_HZ_100=y
+# CONFIG_HZ_250 is not set
+# CONFIG_HZ_300 is not set
+# CONFIG_HZ_1000 is not set
+CONFIG_HZ=100
+# CONFIG_SCHED_HRTICK is not set
+CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
+CONFIG_IRQ_WORK=y
+
+#
+# General setup
+#
+CONFIG_BROKEN_ON_SMP=y
+CONFIG_INIT_ENV_ARG_LIMIT=32
+CONFIG_CROSS_COMPILE="riscv64-unknown-linux-gnu-"
+# CONFIG_COMPILE_TEST is not set
+CONFIG_LOCALVERSION=""
+CONFIG_LOCALVERSION_AUTO=y
+CONFIG_DEFAULT_HOSTNAME="ucbvax"
+CONFIG_SWAP=y
+# CONFIG_SYSVIPC is not set
+# CONFIG_POSIX_MQUEUE is not set
+# CONFIG_FHANDLE is not set
+# CONFIG_AUDIT is not set
+
+#
+# IRQ subsystem
+#
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+
+#
+# Timers subsystem
+#
+CONFIG_HZ_PERIODIC=y
+# CONFIG_NO_HZ_IDLE is not set
+# CONFIG_NO_HZ is not set
+# CONFIG_HIGH_RES_TIMERS is not set
+
+#
+# CPU/Task time and stats accounting
+#
+CONFIG_TICK_CPU_ACCOUNTING=y
+# CONFIG_BSD_PROCESS_ACCT is not set
+# CONFIG_TASKSTATS is not set
+
+#
+# RCU Subsystem
+#
+CONFIG_TINY_RCU=y
+# CONFIG_PREEMPT_RCU is not set
+# CONFIG_RCU_STALL_COMMON is not set
+# CONFIG_TREE_RCU_TRACE is not set
+# CONFIG_IKCONFIG is not set
+CONFIG_LOG_BUF_SHIFT=17
+# CONFIG_CGROUPS is not set
+# CONFIG_CHECKPOINT_RESTORE is not set
+CONFIG_NAMESPACES=y
+CONFIG_UTS_NS=y
+# CONFIG_USER_NS is not set
+CONFIG_PID_NS=y
+CONFIG_NET_NS=y
+# CONFIG_SCHED_AUTOGROUP is not set
+# CONFIG_RELAY is not set
+# CONFIG_BLK_DEV_INITRD is not set
+# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
+CONFIG_SYSCTL=y
+CONFIG_ANON_INODES=y
+CONFIG_SYSCTL_EXCEPTION_TRACE=y
+CONFIG_EXPERT=y
+# CONFIG_SYSCTL_SYSCALL is not set
+CONFIG_KALLSYMS=y
+# CONFIG_KALLSYMS_ALL is not set
+CONFIG_PRINTK=y
+CONFIG_BUG=y
+CONFIG_ELF_CORE=y
+CONFIG_BASE_FULL=y
+CONFIG_FUTEX=y
+CONFIG_EPOLL=y
+CONFIG_SIGNALFD=y
+CONFIG_TIMERFD=y
+CONFIG_EVENTFD=y
+CONFIG_SHMEM=y
+CONFIG_AIO=y
+CONFIG_EMBEDDED=y
+
+#
+# Kernel Performance Events And Counters
+#
+CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_COMPAT_BRK=y
+# CONFIG_SLAB is not set
+CONFIG_SLUB=y
+# CONFIG_SLOB is not set
+# CONFIG_PROFILING is not set
+CONFIG_HAVE_64BIT_ALIGNED_ACCESS=y
+# CONFIG_CC_STACKPROTECTOR is not set
+CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
+CONFIG_CLONE_BACKWARDS=y
+
+#
+# GCOV-based kernel profiling
+#
+# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
+CONFIG_RT_MUTEXES=y
+CONFIG_BASE_SMALL=0
+# CONFIG_MODULES is not set
+CONFIG_BLOCK=y
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_BLK_DEV_BSGLIB is not set
+# CONFIG_BLK_DEV_INTEGRITY is not set
+# CONFIG_BLK_CMDLINE_PARSER is not set
+
+#
+# Partition Types
+#
+CONFIG_PARTITION_ADVANCED=y
+# CONFIG_ACORN_PARTITION is not set
+# CONFIG_AIX_PARTITION is not set
+# CONFIG_OSF_PARTITION is not set
+# CONFIG_AMIGA_PARTITION is not set
+# CONFIG_ATARI_PARTITION is not set
+# CONFIG_MAC_PARTITION is not set
+CONFIG_MSDOS_PARTITION=y
+# CONFIG_BSD_DISKLABEL is not set
+# CONFIG_MINIX_SUBPARTITION is not set
+# CONFIG_SOLARIS_X86_PARTITION is not set
+# CONFIG_UNIXWARE_DISKLABEL is not set
+# CONFIG_LDM_PARTITION is not set
+# CONFIG_SGI_PARTITION is not set
+# CONFIG_ULTRIX_PARTITION is not set
+# CONFIG_SUN_PARTITION is not set
+# CONFIG_KARMA_PARTITION is not set
+# CONFIG_EFI_PARTITION is not set
+# CONFIG_SYSV68_PARTITION is not set
+# CONFIG_CMDLINE_PARTITION is not set
+
+#
+# IO Schedulers
+#
+CONFIG_IOSCHED_NOOP=y
+# CONFIG_IOSCHED_DEADLINE is not set
+CONFIG_IOSCHED_CFQ=y
+CONFIG_DEFAULT_CFQ=y
+# CONFIG_DEFAULT_NOOP is not set
+CONFIG_DEFAULT_IOSCHED="cfq"
+CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
+CONFIG_INLINE_READ_UNLOCK=y
+CONFIG_INLINE_READ_UNLOCK_IRQ=y
+CONFIG_INLINE_WRITE_UNLOCK=y
+CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
+# CONFIG_FREEZER is not set
+
+#
+# Executable file formats
+#
+CONFIG_BINFMT_ELF=y
+CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
+CONFIG_BINFMT_SCRIPT=y
+# CONFIG_HAVE_AOUT is not set
+# CONFIG_BINFMT_MISC is not set
+CONFIG_COREDUMP=y
+
+#
+# Power management options
+#
+# CONFIG_PM_RUNTIME is not set
+CONFIG_NET=y
+
+#
+# Networking options
+#
+# CONFIG_PACKET is not set
+CONFIG_UNIX=y
+# CONFIG_UNIX_DIAG is not set
+# CONFIG_XFRM_USER is not set
+# CONFIG_NET_KEY is not set
+CONFIG_INET=y
+# CONFIG_IP_MULTICAST is not set
+# CONFIG_IP_ADVANCED_ROUTER is not set
+# CONFIG_IP_PNP is not set
+# CONFIG_NET_IPIP is not set
+# CONFIG_NET_IPGRE_DEMUX is not set
+# CONFIG_NET_IP_TUNNEL is not set
+# CONFIG_SYN_COOKIES is not set
+# CONFIG_INET_AH is not set
+# CONFIG_INET_ESP is not set
+# CONFIG_INET_IPCOMP is not set
+# CONFIG_INET_XFRM_TUNNEL is not set
+# CONFIG_INET_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_LRO is not set
+# CONFIG_INET_DIAG is not set
+# CONFIG_TCP_CONG_ADVANCED is not set
+CONFIG_TCP_CONG_CUBIC=y
+CONFIG_DEFAULT_TCP_CONG="cubic"
+# CONFIG_TCP_MD5SIG is not set
+# CONFIG_IPV6 is not set
+# CONFIG_NETWORK_SECMARK is not set
+# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
+# CONFIG_NETFILTER is not set
+# CONFIG_IP_DCCP is not set
+# CONFIG_IP_SCTP is not set
+# CONFIG_RDS is not set
+# CONFIG_TIPC is not set
+# CONFIG_ATM is not set
+# CONFIG_L2TP is not set
+# CONFIG_BRIDGE is not set
+# CONFIG_VLAN_8021Q is not set
+# CONFIG_DECNET is not set
+# CONFIG_LLC2 is not set
+# CONFIG_IPX is not set
+# CONFIG_ATALK is not set
+# CONFIG_X25 is not set
+# CONFIG_LAPB is not set
+# CONFIG_PHONET is not set
+# CONFIG_IEEE802154 is not set
+# CONFIG_NET_SCHED is not set
+# CONFIG_DCB is not set
+# CONFIG_BATMAN_ADV is not set
+# CONFIG_OPENVSWITCH is not set
+# CONFIG_VSOCKETS is not set
+# CONFIG_NETLINK_MMAP is not set
+# CONFIG_NETLINK_DIAG is not set
+# CONFIG_NET_MPLS_GSO is not set
+# CONFIG_HSR is not set
+CONFIG_NET_RX_BUSY_POLL=y
+
+#
+# Network testing
+#
+# CONFIG_NET_PKTGEN is not set
+# CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
+# CONFIG_IRDA is not set
+# CONFIG_BT is not set
+# CONFIG_AF_RXRPC is not set
+# CONFIG_WIRELESS is not set
+# CONFIG_WIMAX is not set
+# CONFIG_RFKILL is not set
+# CONFIG_NET_9P is not set
+# CONFIG_CAIF is not set
+# CONFIG_CEPH_LIB is not set
+# CONFIG_NFC is not set
+
+#
+# Device Drivers
+#
+
+#
+# Generic Driver Options
+#
+CONFIG_UEVENT_HELPER_PATH=""
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_STANDALONE=y
+CONFIG_PREVENT_FIRMWARE_BUILD=y
+CONFIG_FW_LOADER=y
+# CONFIG_FIRMWARE_IN_KERNEL is not set
+CONFIG_EXTRA_FIRMWARE=""
+CONFIG_FW_LOADER_USER_HELPER=y
+# CONFIG_DEBUG_DRIVER is not set
+# CONFIG_DEBUG_DEVRES is not set
+# CONFIG_SYS_HYPERVISOR is not set
+CONFIG_GENERIC_CPU_DEVICES=y
+# CONFIG_DMA_SHARED_BUFFER is not set
+
+#
+# Bus devices
+#
+# CONFIG_CONNECTOR is not set
+# CONFIG_MTD is not set
+# CONFIG_PARPORT is not set
+# CONFIG_BLK_DEV is not set
+
+#
+# Misc devices
+#
+# CONFIG_SENSORS_LIS3LV02D is not set
+# CONFIG_DUMMY_IRQ is not set
+# CONFIG_ATMEL_SSC is not set
+# CONFIG_ENCLOSURE_SERVICES is not set
+# CONFIG_SRAM is not set
+# CONFIG_C2PORT is not set
+
+#
+# EEPROM support
+#
+# CONFIG_EEPROM_93CX6 is not set
+
+#
+# Texas Instruments shared transport line discipline
+#
+
+#
+# Altera FPGA firmware download module
+#
+
+#
+# Intel MIC Host Driver
+#
+
+#
+# Intel MIC Card Driver
+#
+
+#
+# SCSI device support
+#
+CONFIG_SCSI_MOD=y
+# CONFIG_RAID_ATTRS is not set
+# CONFIG_SCSI is not set
+# CONFIG_SCSI_DMA is not set
+# CONFIG_SCSI_NETLINK is not set
+# CONFIG_ATA is not set
+# CONFIG_MD is not set
+# CONFIG_NETDEVICES is not set
+
+#
+# Input device support
+#
+CONFIG_INPUT=y
+# CONFIG_INPUT_FF_MEMLESS is not set
+# CONFIG_INPUT_POLLDEV is not set
+# CONFIG_INPUT_SPARSEKMAP is not set
+# CONFIG_INPUT_MATRIXKMAP is not set
+
+#
+# Userland interfaces
+#
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_JOYDEV is not set
+# CONFIG_INPUT_EVDEV is not set
+# CONFIG_INPUT_EVBUG is not set
+
+#
+# Input Device Drivers
+#
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_INPUT_JOYSTICK is not set
+# CONFIG_INPUT_TABLET is not set
+# CONFIG_INPUT_TOUCHSCREEN is not set
+# CONFIG_INPUT_MISC is not set
+
+#
+# Hardware I/O ports
+#
+CONFIG_SERIO=y
+CONFIG_SERIO_SERPORT=y
+# CONFIG_SERIO_LIBPS2 is not set
+# CONFIG_SERIO_RAW is not set
+# CONFIG_SERIO_ALTERA_PS2 is not set
+# CONFIG_SERIO_PS2MULT is not set
+# CONFIG_SERIO_ARC_PS2 is not set
+# CONFIG_GAMEPORT is not set
+
+#
+# Character devices
+#
+CONFIG_TTY=y
+# CONFIG_VT is not set
+CONFIG_UNIX98_PTYS=y
+# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
+CONFIG_LEGACY_PTYS=y
+CONFIG_LEGACY_PTY_COUNT=256
+# CONFIG_SERIAL_NONSTANDARD is not set
+# CONFIG_N_GSM is not set
+# CONFIG_TRACE_SINK is not set
+CONFIG_DEVKMEM=y
+
+#
+# Serial drivers
+#
+# CONFIG_SERIAL_8250 is not set
+
+#
+# Non-8250 serial port support
+#
+# CONFIG_SERIAL_SCCNXP is not set
+# CONFIG_SERIAL_TIMBERDALE is not set
+# CONFIG_SERIAL_ALTERA_JTAGUART is not set
+# CONFIG_SERIAL_ALTERA_UART is not set
+# CONFIG_SERIAL_ARC is not set
+# CONFIG_SERIAL_FSL_LPUART is not set
+# CONFIG_TTY_PRINTK is not set
+# CONFIG_IPMI_HANDLER is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_RTC is not set
+# CONFIG_GEN_RTC is not set
+# CONFIG_R3964 is not set
+
+#
+# PCMCIA character devices
+#
+# CONFIG_RAW_DRIVER is not set
+# CONFIG_TCG_TPM is not set
+# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+# CONFIG_HSI is not set
+
+#
+# PPS support
+#
+# CONFIG_PPS is not set
+
+#
+# PPS generators support
+#
+
+#
+# PTP clock support
+#
+# CONFIG_PTP_1588_CLOCK is not set
+
+#
+# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
+#
+# CONFIG_W1 is not set
+# CONFIG_POWER_SUPPLY is not set
+# CONFIG_POWER_AVS is not set
+# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
+# CONFIG_WATCHDOG is not set
+
+#
+# Multifunction device drivers
+#
+# CONFIG_MFD_CORE is not set
+# CONFIG_MFD_CROS_EC is not set
+# CONFIG_HTC_PASIC3 is not set
+# CONFIG_MFD_KEMPLD is not set
+# CONFIG_MFD_SM501 is not set
+# CONFIG_ABX500_CORE is not set
+# CONFIG_MFD_SYSCON is not set
+# CONFIG_MFD_TI_AM335X_TSCADC is not set
+# CONFIG_MFD_TMIO is not set
+# CONFIG_REGULATOR is not set
+# CONFIG_MEDIA_SUPPORT is not set
+
+#
+# Graphics support
+#
+# CONFIG_VGASTATE is not set
+# CONFIG_VIDEO_OUTPUT_CONTROL is not set
+CONFIG_FB=y
+# CONFIG_FIRMWARE_EDID is not set
+# CONFIG_FB_DDC is not set
+# CONFIG_FB_BOOT_VESA_SUPPORT is not set
+# CONFIG_FB_CFB_FILLRECT is not set
+# CONFIG_FB_CFB_COPYAREA is not set
+# CONFIG_FB_CFB_IMAGEBLIT is not set
+# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
+# CONFIG_FB_SYS_FILLRECT is not set
+# CONFIG_FB_SYS_COPYAREA is not set
+# CONFIG_FB_SYS_IMAGEBLIT is not set
+# CONFIG_FB_FOREIGN_ENDIAN is not set
+# CONFIG_FB_SYS_FOPS is not set
+# CONFIG_FB_SVGALIB is not set
+# CONFIG_FB_MACMODES is not set
+# CONFIG_FB_BACKLIGHT is not set
+# CONFIG_FB_MODE_HELPERS is not set
+# CONFIG_FB_TILEBLITTING is not set
+
+#
+# Frame buffer hardware drivers
+#
+# CONFIG_FB_OPENCORES is not set
+# CONFIG_FB_S1D13XXX is not set
+# CONFIG_FB_VIRTUAL is not set
+# CONFIG_FB_METRONOME is not set
+# CONFIG_FB_BROADSHEET is not set
+# CONFIG_FB_AUO_K190X is not set
+# CONFIG_FB_SIMPLE is not set
+# CONFIG_EXYNOS_VIDEO is not set
+# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
+# CONFIG_LOGO is not set
+# CONFIG_SOUND is not set
+
+#
+# HID support
+#
+CONFIG_HID=y
+# CONFIG_HIDRAW is not set
+# CONFIG_UHID is not set
+CONFIG_HID_GENERIC=y
+
+#
+# Special HID drivers
+#
+# CONFIG_HID_A4TECH is not set
+# CONFIG_HID_ACRUX is not set
+# CONFIG_HID_APPLE is not set
+# CONFIG_HID_AUREAL is not set
+# CONFIG_HID_BELKIN is not set
+# CONFIG_HID_CHERRY is not set
+# CONFIG_HID_CHICONY is not set
+# CONFIG_HID_CYPRESS is not set
+# CONFIG_HID_DRAGONRISE is not set
+# CONFIG_HID_EMS_FF is not set
+# CONFIG_HID_ELECOM is not set
+# CONFIG_HID_EZKEY is not set
+# CONFIG_HID_KEYTOUCH is not set
+# CONFIG_HID_KYE is not set
+# CONFIG_HID_UCLOGIC is not set
+# CONFIG_HID_WALTOP is not set
+# CONFIG_HID_GYRATION is not set
+# CONFIG_HID_ICADE is not set
+# CONFIG_HID_TWINHAN is not set
+# CONFIG_HID_KENSINGTON is not set
+# CONFIG_HID_LCPOWER is not set
+# CONFIG_HID_LENOVO_TPKBD is not set
+# CONFIG_HID_LOGITECH is not set
+# CONFIG_HID_MAGICMOUSE is not set
+# CONFIG_HID_MICROSOFT is not set
+# CONFIG_HID_MONTEREY is not set
+# CONFIG_HID_MULTITOUCH is not set
+# CONFIG_HID_ORTEK is not set
+# CONFIG_HID_PANTHERLORD is not set
+# CONFIG_HID_PETALYNX is not set
+# CONFIG_HID_PICOLCD is not set
+# CONFIG_HID_PRIMAX is not set
+# CONFIG_HID_SAITEK is not set
+# CONFIG_HID_SAMSUNG is not set
+# CONFIG_HID_SPEEDLINK is not set
+# CONFIG_HID_STEELSERIES is not set
+# CONFIG_HID_SUNPLUS is not set
+# CONFIG_HID_GREENASIA is not set
+# CONFIG_HID_SMARTJOYPLUS is not set
+# CONFIG_HID_TIVO is not set
+# CONFIG_HID_TOPSEED is not set
+# CONFIG_HID_THRUSTMASTER is not set
+# CONFIG_HID_XINMO is not set
+# CONFIG_HID_ZEROPLUS is not set
+# CONFIG_HID_ZYDACRON is not set
+# CONFIG_HID_SENSOR_HUB is not set
+CONFIG_USB_OHCI_LITTLE_ENDIAN=y
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_MMC is not set
+# CONFIG_MEMSTICK is not set
+# CONFIG_NEW_LEDS is not set
+# CONFIG_ACCESSIBILITY is not set
+# CONFIG_RTC_CLASS is not set
+# CONFIG_AUXDISPLAY is not set
+# CONFIG_UIO is not set
+# CONFIG_VIRT_DRIVERS is not set
+
+#
+# Virtio drivers
+#
+# CONFIG_VIRTIO_MMIO is not set
+
+#
+# Microsoft Hyper-V guest support
+#
+# CONFIG_STAGING is not set
+
+#
+# Hardware Spinlock drivers
+#
+# CONFIG_MAILBOX is not set
+# CONFIG_IOMMU_SUPPORT is not set
+
+#
+# Remoteproc drivers
+#
+
+#
+# Rpmsg drivers
+#
+# CONFIG_PM_DEVFREQ is not set
+# CONFIG_EXTCON is not set
+# CONFIG_MEMORY is not set
+# CONFIG_IIO is not set
+# CONFIG_PWM is not set
+# CONFIG_IPACK_BUS is not set
+# CONFIG_RESET_CONTROLLER is not set
+# CONFIG_FMC is not set
+
+#
+# PHY Subsystem
+#
+# CONFIG_GENERIC_PHY is not set
+# CONFIG_PHY_EXYNOS_MIPI_VIDEO is not set
+# CONFIG_POWERCAP is not set
+
+#
+# File systems
+#
+CONFIG_EXT2_FS=y
+# CONFIG_EXT2_FS_XATTR is not set
+# CONFIG_EXT2_FS_XIP is not set
+# CONFIG_EXT3_FS is not set
+# CONFIG_EXT4_FS is not set
+# CONFIG_REISERFS_FS is not set
+# CONFIG_JFS_FS is not set
+# CONFIG_XFS_FS is not set
+# CONFIG_GFS2_FS is not set
+# CONFIG_BTRFS_FS is not set
+# CONFIG_NILFS2_FS is not set
+# CONFIG_FS_POSIX_ACL is not set
+# CONFIG_FILE_LOCKING is not set
+# CONFIG_FSNOTIFY is not set
+# CONFIG_DNOTIFY is not set
+# CONFIG_INOTIFY_USER is not set
+# CONFIG_FANOTIFY is not set
+# CONFIG_QUOTA is not set
+# CONFIG_QUOTACTL is not set
+# CONFIG_AUTOFS4_FS is not set
+# CONFIG_FUSE_FS is not set
+
+#
+# Caches
+#
+# CONFIG_FSCACHE is not set
+
+#
+# CD-ROM/DVD Filesystems
+#
+# CONFIG_ISO9660_FS is not set
+# CONFIG_UDF_FS is not set
+
+#
+# DOS/FAT/NT Filesystems
+#
+# CONFIG_MSDOS_FS is not set
+# CONFIG_VFAT_FS is not set
+# CONFIG_NTFS_FS is not set
+
+#
+# Pseudo filesystems
+#
+CONFIG_PROC_FS=y
+# CONFIG_PROC_KCORE is not set
+CONFIG_PROC_SYSCTL=y
+# CONFIG_PROC_PAGE_MONITOR is not set
+# CONFIG_SYSFS is not set
+CONFIG_TMPFS=y
+# CONFIG_TMPFS_POSIX_ACL is not set
+# CONFIG_TMPFS_XATTR is not set
+# CONFIG_HUGETLB_PAGE is not set
+# CONFIG_CONFIGFS_FS is not set
+# CONFIG_MISC_FILESYSTEMS is not set
+# CONFIG_NETWORK_FILESYSTEMS is not set
+# CONFIG_NLS is not set
+
+#
+# Kernel hacking
+#
+# CONFIG_CMDLINE_BOOL is not set
+# CONFIG_EARLY_PRINTK is not set
+
+#
+# printk and dmesg options
+#
+CONFIG_PRINTK_TIME=y
+CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
+# CONFIG_BOOT_PRINTK_DELAY is not set
+
+#
+# Compile-time checks and compiler options
+#
+# CONFIG_DEBUG_INFO is not set
+CONFIG_ENABLE_WARN_DEPRECATED=y
+CONFIG_ENABLE_MUST_CHECK=y
+CONFIG_FRAME_WARN=2048
+# CONFIG_STRIP_ASM_SYMS is not set
+# CONFIG_READABLE_ASM is not set
+# CONFIG_UNUSED_SYMBOLS is not set
+# CONFIG_DEBUG_FS is not set
+# CONFIG_HEADERS_CHECK is not set
+CONFIG_DEBUG_SECTION_MISMATCH=y
+CONFIG_ARCH_WANT_FRAME_POINTERS=y
+# CONFIG_FRAME_POINTER is not set
+# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
+# CONFIG_MAGIC_SYSRQ is not set
+CONFIG_DEBUG_KERNEL=y
+
+#
+# Memory Debugging
+#
+# CONFIG_DEBUG_PAGEALLOC is not set
+# CONFIG_DEBUG_OBJECTS is not set
+# CONFIG_DEBUG_STACK_USAGE is not set
+# CONFIG_DEBUG_VM is not set
+# CONFIG_DEBUG_MEMORY_INIT is not set
+# CONFIG_DEBUG_SHIRQ is not set
+
+#
+# Debug Lockups and Hangs
+#
+# CONFIG_LOCKUP_DETECTOR is not set
+# CONFIG_DETECT_HUNG_TASK is not set
+# CONFIG_PANIC_ON_OOPS is not set
+CONFIG_PANIC_ON_OOPS_VALUE=0
+CONFIG_PANIC_TIMEOUT=0
+CONFIG_SCHED_DEBUG=y
+# CONFIG_SCHEDSTATS is not set
+# CONFIG_TIMER_STATS is not set
+
+#
+# Lock Debugging (spinlocks, mutexes, etc...)
+#
+# CONFIG_DEBUG_RT_MUTEXES is not set
+# CONFIG_RT_MUTEX_TESTER is not set
+# CONFIG_DEBUG_SPINLOCK is not set
+# CONFIG_DEBUG_MUTEXES is not set
+# CONFIG_DEBUG_ATOMIC_SLEEP is not set
+# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+# CONFIG_DEBUG_KOBJECT is not set
+CONFIG_DEBUG_BUGVERBOSE=y
+# CONFIG_DEBUG_WRITECOUNT is not set
+# CONFIG_DEBUG_LIST is not set
+# CONFIG_DEBUG_SG is not set
+# CONFIG_DEBUG_NOTIFIERS is not set
+# CONFIG_DEBUG_CREDENTIALS is not set
+
+#
+# RCU Debugging
+#
+# CONFIG_SPARSE_RCU_POINTER is not set
+# CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_RCU_TRACE is not set
+# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
+# CONFIG_NOTIFIER_ERROR_INJECTION is not set
+# CONFIG_FAULT_INJECTION is not set
+
+#
+# Runtime Testing
+#
+# CONFIG_TEST_LIST_SORT is not set
+# CONFIG_BACKTRACE_SELF_TEST is not set
+# CONFIG_RBTREE_TEST is not set
+# CONFIG_ATOMIC64_SELFTEST is not set
+# CONFIG_TEST_STRING_HELPERS is not set
+# CONFIG_TEST_KSTRTOX is not set
+# CONFIG_SAMPLES is not set
+
+#
+# Security options
+#
+# CONFIG_KEYS is not set
+# CONFIG_SECURITY_DMESG_RESTRICT is not set
+# CONFIG_SECURITYFS is not set
+CONFIG_DEFAULT_SECURITY_DAC=y
+CONFIG_DEFAULT_SECURITY=""
+CONFIG_CRYPTO=y
+
+#
+# Crypto core or helper
+#
+CONFIG_CRYPTO_ALGAPI=y
+CONFIG_CRYPTO_ALGAPI2=y
+# CONFIG_CRYPTO_MANAGER is not set
+# CONFIG_CRYPTO_MANAGER2 is not set
+# CONFIG_CRYPTO_USER is not set
+# CONFIG_CRYPTO_GF128MUL is not set
+# CONFIG_CRYPTO_NULL is not set
+# CONFIG_CRYPTO_CRYPTD is not set
+# CONFIG_CRYPTO_AUTHENC is not set
+
+#
+# Authenticated Encryption with Associated Data
+#
+# CONFIG_CRYPTO_CCM is not set
+# CONFIG_CRYPTO_GCM is not set
+# CONFIG_CRYPTO_SEQIV is not set
+
+#
+# Block modes
+#
+# CONFIG_CRYPTO_CBC is not set
+# CONFIG_CRYPTO_CTR is not set
+# CONFIG_CRYPTO_CTS is not set
+# CONFIG_CRYPTO_ECB is not set
+# CONFIG_CRYPTO_LRW is not set
+# CONFIG_CRYPTO_PCBC is not set
+# CONFIG_CRYPTO_XTS is not set
+
+#
+# Hash modes
+#
+# CONFIG_CRYPTO_CMAC is not set
+# CONFIG_CRYPTO_HMAC is not set
+# CONFIG_CRYPTO_XCBC is not set
+# CONFIG_CRYPTO_VMAC is not set
+
+#
+# Digest
+#
+# CONFIG_CRYPTO_CRC32C is not set
+# CONFIG_CRYPTO_CRC32 is not set
+# CONFIG_CRYPTO_CRCT10DIF is not set
+# CONFIG_CRYPTO_GHASH is not set
+# CONFIG_CRYPTO_MD4 is not set
+# CONFIG_CRYPTO_MD5 is not set
+# CONFIG_CRYPTO_MICHAEL_MIC is not set
+# CONFIG_CRYPTO_RMD128 is not set
+# CONFIG_CRYPTO_RMD160 is not set
+# CONFIG_CRYPTO_RMD256 is not set
+# CONFIG_CRYPTO_RMD320 is not set
+# CONFIG_CRYPTO_SHA1 is not set
+# CONFIG_CRYPTO_SHA256 is not set
+# CONFIG_CRYPTO_SHA512 is not set
+# CONFIG_CRYPTO_TGR192 is not set
+# CONFIG_CRYPTO_WP512 is not set
+
+#
+# Ciphers
+#
+CONFIG_CRYPTO_AES=y
+# CONFIG_CRYPTO_ANUBIS is not set
+# CONFIG_CRYPTO_ARC4 is not set
+# CONFIG_CRYPTO_BLOWFISH is not set
+# CONFIG_CRYPTO_CAMELLIA is not set
+# CONFIG_CRYPTO_CAST5 is not set
+# CONFIG_CRYPTO_CAST6 is not set
+# CONFIG_CRYPTO_DES is not set
+# CONFIG_CRYPTO_FCRYPT is not set
+# CONFIG_CRYPTO_KHAZAD is not set
+# CONFIG_CRYPTO_SALSA20 is not set
+# CONFIG_CRYPTO_SEED is not set
+# CONFIG_CRYPTO_SERPENT is not set
+# CONFIG_CRYPTO_TEA is not set
+# CONFIG_CRYPTO_TWOFISH is not set
+
+#
+# Compression
+#
+# CONFIG_CRYPTO_DEFLATE is not set
+# CONFIG_CRYPTO_ZLIB is not set
+# CONFIG_CRYPTO_LZO is not set
+# CONFIG_CRYPTO_LZ4 is not set
+# CONFIG_CRYPTO_LZ4HC is not set
+
+#
+# Random Number Generation
+#
+# CONFIG_CRYPTO_ANSI_CPRNG is not set
+# CONFIG_CRYPTO_USER_API_HASH is not set
+# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
+# CONFIG_CRYPTO_HW is not set
+# CONFIG_BINARY_PRINTF is not set
+
+#
+# Library routines
+#
+CONFIG_BITREVERSE=y
+CONFIG_GENERIC_STRNCPY_FROM_USER=y
+CONFIG_GENERIC_STRNLEN_USER=y
+CONFIG_GENERIC_NET_UTILS=y
+CONFIG_GENERIC_IO=y
+# CONFIG_CRC_CCITT is not set
+# CONFIG_CRC16 is not set
+# CONFIG_CRC_T10DIF is not set
+# CONFIG_CRC_ITU_T is not set
+CONFIG_CRC32=y
+# CONFIG_CRC32_SELFTEST is not set
+CONFIG_CRC32_SLICEBY8=y
+# CONFIG_CRC32_SLICEBY4 is not set
+# CONFIG_CRC32_SARWATE is not set
+# CONFIG_CRC32_BIT is not set
+# CONFIG_CRC7 is not set
+# CONFIG_LIBCRC32C is not set
+# CONFIG_CRC8 is not set
+# CONFIG_RANDOM32_SELFTEST is not set
+# CONFIG_XZ_DEC is not set
+# CONFIG_XZ_DEC_BCJ is not set
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT=y
+CONFIG_NLATTR=y
+CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE=y
+# CONFIG_AVERAGE is not set
+# CONFIG_CORDIC is not set
+# CONFIG_DDR is not set
diff -Nur linux-4.6.2/arch/riscv/.gitignore linux-4.6.2.riscv/arch/riscv/.gitignore
--- linux-4.6.2/arch/riscv/.gitignore	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/.gitignore	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1,35 @@
+# Now un-ignore all files.
+!*
+
+# But then re-ignore the files listed in the Linux .gitignore
+# Normal rules
+#
+.*
+*.o
+*.o.*
+*.a
+*.s
+*.ko
+*.so
+*.so.dbg
+*.mod.c
+*.i
+*.lst
+*.symtypes
+*.order
+modules.builtin
+*.elf
+*.bin
+*.gz
+*.bz2
+*.lzma
+*.xz
+*.lzo
+*.patch
+*.gcno
+
+include/generated
+kernel/vmlinux.lds
+
+# Then reinclude .gitignore.
+!.gitignore
diff -Nur linux-4.6.2/arch/riscv/include/asm/asm.h linux-4.6.2.riscv/arch/riscv/include/asm/asm.h
--- linux-4.6.2/arch/riscv/include/asm/asm.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/asm.h	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1,51 @@
+#ifndef _ASM_RISCV_ASM_H
+#define _ASM_RISCV_ASM_H
+
+#ifdef __ASSEMBLY__
+#define __ASM_STR(x)	x
+#else
+#define __ASM_STR(x)	#x
+#endif
+
+#if __riscv_xlen == 64
+#define __REG_SEL(a,b)	__ASM_STR(a)
+#elif __riscv_xlen == 32
+#define __REG_SEL(a,b)	__ASM_STR(b)
+#else
+#error "Unexpected __riscv_xlen"
+#endif
+
+#define REG_L		__REG_SEL(ld, lw)
+#define REG_S		__REG_SEL(sd, sw)
+#define SZREG		__REG_SEL(8, 4)
+#define LGREG		__REG_SEL(3, 2)
+
+#if __SIZEOF_POINTER__ == 8
+#define __PTR_SEL(a,b)	__ASM_STR(a)
+#elif __SIZEOF_POINTER__ == 4
+#define __PTR_SEL(a,b)	__ASM_STR(b)
+#else
+#error "Unexpected __SIZEOF_POINTER__"
+#endif
+
+#define PTR		__PTR_SEL(.dword, .word)
+#define SZPTR		__PTR_SEL(8, 4)
+#define LGPTR		__PTR_SEL(3, 2)
+
+#if (__SIZEOF_INT__ == 4)
+#define INT		__ASM_STR(.word)
+#define SZINT		__ASM_STR(4)
+#define LGINT		__ASM_STR(2)
+#else
+#error "Unexpected __SIZEOF_INT__"
+#endif
+
+#if (__SIZEOF_SHORT__ == 2)
+#define SHORT		__ASM_STR(.half)
+#define SZSHORT		__ASM_STR(2)
+#define LGSHORT		__ASM_STR(1)
+#else
+#error "Unexpected __SIZEOF_SHORT__"
+#endif
+
+#endif /* _ASM_RISCV_ASM_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/asm-offsets.h linux-4.6.2.riscv/arch/riscv/include/asm/asm-offsets.h
--- linux-4.6.2/arch/riscv/include/asm/asm-offsets.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/asm-offsets.h	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1 @@
+#include <generated/asm-offsets.h>
diff -Nur linux-4.6.2/arch/riscv/include/asm/atomic64.h linux-4.6.2.riscv/arch/riscv/include/asm/atomic64.h
--- linux-4.6.2/arch/riscv/include/asm/atomic64.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/atomic64.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,287 @@
+#ifndef _ASM_RISCV_ATOMIC64_H
+#define _ASM_RISCV_ATOMIC64_H
+
+#ifdef CONFIG_GENERIC_ATOMIC64
+#include <asm-generic/atomic64.h>
+#else /* !CONFIG_GENERIC_ATOMIC64 */
+
+#include <linux/types.h>
+
+#define ATOMIC64_INIT(i)	{ (i) }
+
+/**
+ * atomic64_read - read atomic64 variable
+ * @v: pointer of type atomic64_t
+ *
+ * Atomically reads the value of @v.
+ */
+static inline s64 atomic64_read(const atomic64_t *v)
+{
+	return *((volatile long *)(&(v->counter)));
+}
+
+/**
+ * atomic64_set - set atomic64 variable
+ * @v: pointer to type atomic64_t
+ * @i: required value
+ *
+ * Atomically sets the value of @v to @i.
+ */
+static inline void atomic64_set(atomic64_t *v, s64 i)
+{
+	v->counter = i;
+}
+
+/**
+ * atomic64_add - add integer to atomic64 variable
+ * @i: integer value to add
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically adds @i to @v.
+ */
+static inline void atomic64_add(s64 a, atomic64_t *v)
+{
+	__asm__ __volatile__ (
+		"amoadd.d zero, %1, %0"
+		: "+A" (v->counter)
+		: "r" (a));
+}
+
+/**
+ * atomic64_sub - subtract the atomic64 variable
+ * @i: integer value to subtract
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically subtracts @i from @v.
+ */
+static inline void atomic64_sub(s64 a, atomic64_t *v)
+{
+	atomic64_add(-a, v);
+}
+
+/**
+ * atomic64_add_return - add and return
+ * @i: integer value to add
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically adds @i to @v and returns @i + @v
+ */
+static inline s64 atomic64_add_return(s64 a, atomic64_t *v)
+{
+	register s64 c;
+	__asm__ __volatile__ (
+		"amoadd.d %0, %2, %1"
+		: "=r" (c), "+A" (v->counter)
+		: "r" (a));
+	return (c + a);
+}
+
+static inline s64 atomic64_sub_return(s64 a, atomic64_t *v)
+{
+	return atomic64_add_return(-a, v);
+}
+
+/**
+ * atomic64_inc - increment atomic64 variable
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically increments @v by 1.
+ */
+static inline void atomic64_inc(atomic64_t *v)
+{
+	atomic64_add(1L, v);
+}
+
+/**
+ * atomic64_dec - decrement atomic64 variable
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically decrements @v by 1.
+ */
+static inline void atomic64_dec(atomic64_t *v)
+{
+	atomic64_add(-1L, v);
+}
+
+static inline s64 atomic64_inc_return(atomic64_t *v)
+{
+	return atomic64_add_return(1L, v);
+}
+
+static inline s64 atomic64_dec_return(atomic64_t *v)
+{
+	return atomic64_add_return(-1L, v);
+}
+
+/**
+ * atomic64_inc_and_test - increment and test
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically increments @v by 1
+ * and returns true if the result is zero, or false for all
+ * other cases.
+ */
+static inline int atomic64_inc_and_test(atomic64_t *v)
+{
+	return (atomic64_inc_return(v) == 0);
+}
+
+/**
+ * atomic64_dec_and_test - decrement and test
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically decrements @v by 1 and
+ * returns true if the result is 0, or false for all other
+ * cases.
+ */
+static inline int atomic64_dec_and_test(atomic64_t *v)
+{
+	return (atomic64_dec_return(v) == 0);
+}
+
+/**
+ * atomic64_sub_and_test - subtract value from variable and test result
+ * @a: integer value to subtract
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically subtracts @a from @v and returns
+ * true if the result is zero, or false for all
+ * other cases.
+ */
+static inline int atomic64_sub_and_test(s64 a, atomic64_t *v)
+{
+	return (atomic64_sub_return(a, v) == 0);
+}
+
+/**
+ * atomic64_add_negative - add and test if negative
+ * @a: integer value to add
+ * @v: pointer to type atomic64_t
+ *
+ * Atomically adds @a to @v and returns true
+ * if the result is negative, or false when
+ * result is greater than or equal to zero.
+ */
+static inline int atomic64_add_negative(s64 a, atomic64_t *v)
+{
+	return (atomic64_add_return(a, v) < 0);
+}
+
+
+static inline s64 atomic64_xchg(atomic64_t *v, s64 n)
+{
+	register s64 c;
+	__asm__ __volatile__ (
+		"amoswap.d %0, %2, %1"
+		: "=r" (c), "+A" (v->counter)
+		: "r" (n));
+	return c;
+}
+
+static inline s64 atomic64_cmpxchg(atomic64_t *v, s64 o, s64 n)
+{
+	return cmpxchg(&(v->counter), o, n);
+}
+
+/*
+ * atomic64_dec_if_positive - decrement by 1 if old value positive
+ * @v: pointer of type atomic_t
+ *
+ * The function returns the old value of *v minus 1, even if
+ * the atomic variable, v, was not decremented.
+ */
+static inline s64 atomic64_dec_if_positive(atomic64_t *v)
+{
+	register s64 prev, rc;
+	__asm__ __volatile__ (
+	"0:"
+		"lr.d %0, %2\n"
+		"add  %0, %0, -1\n"
+		"bltz %0, 1f\n"
+		"sc.w %1, %0, %2\n"
+		"bnez %1, 0b\n"
+	"1:"
+		: "=&r" (prev), "=r" (rc), "+A" (v->counter));
+	return prev;
+}
+
+/**
+ * atomic64_add_unless - add unless the number is a given value
+ * @v: pointer of type atomic64_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, so long as it was not @u.
+ * Returns true if the addition occurred and false otherwise.
+ */
+static inline int atomic64_add_unless(atomic64_t *v, s64 a, s64 u)
+{
+	register s64 tmp;
+	register int rc = 1;
+
+	__asm__ __volatile__ (
+	"0:"
+		"lr.d %0, %2\n"
+		"beq  %0, %z4, 1f\n"
+		"add  %0, %0, %3\n"
+		"sc.d %1, %0, %2\n"
+		"bnez %1, 0b\n"
+	"1:"
+		: "=&r" (tmp), "=&r" (rc), "+A" (v->counter)
+		: "rI" (a), "rJ" (u));
+	return !rc;
+}
+
+static inline int atomic64_inc_not_zero(atomic64_t *v)
+{
+	return atomic64_add_unless(v, 1, 0);
+}
+
+/**
+ * atomic64_and - Atomically clear bits in atomic variable
+ * @mask: Mask of the bits to be retained
+ * @v: pointer of type atomic_t
+ *
+ * Atomically retains the bits set in @mask from @v
+ */
+static inline void atomic64_and(s64 mask, atomic64_t *v)
+{
+	__asm__ __volatile__ (
+		"amoand.d zero, %1, %0"
+		: "+A" (v->counter)
+		: "r" (mask));
+}
+
+/**
+ * atomic64_or - Atomically set bits in atomic variable
+ * @mask: Mask of the bits to be set
+ * @v: pointer of type atomic_t
+ *
+ * Atomically sets the bits set in @mask in @v
+ */
+static inline void atomic64_or(s64 mask, atomic64_t *v)
+{
+	__asm__ __volatile__ (
+		"amoor.d zero, %1, %0"
+		: "+A" (v->counter)
+		: "r" (mask));
+}
+
+/**
+ * atomic64_xor - Atomically flips bits in atomic variable
+ * @mask: Mask of the bits to be flipped
+ * @v: pointer of type atomic_t
+ *
+ * Atomically flips the bits set in @mask in @v
+ */
+static inline void atomic64_xor(s64 mask, atomic64_t *v)
+{
+	__asm__ __volatile__ (
+		"amoxor.d zero, %1, %0"
+		: "+A" (v->counter)
+		: "r" (mask));
+}
+
+#endif /* CONFIG_GENERIC_ATOMIC64 */
+
+#endif /* _ASM_RISCV_ATOMIC64_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/atomic.h linux-4.6.2.riscv/arch/riscv/include/asm/atomic.h
--- linux-4.6.2/arch/riscv/include/asm/atomic.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/atomic.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,276 @@
+#ifndef _ASM_RISCV_ATOMIC_H
+#define _ASM_RISCV_ATOMIC_H
+
+#ifdef CONFIG_RV_ATOMIC
+
+#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
+
+#define ATOMIC_INIT(i)	{ (i) }
+
+/**
+ * atomic_read - read atomic variable
+ * @v: pointer of type atomic_t
+ *
+ * Atomically reads the value of @v.
+ */
+static inline int atomic_read(const atomic_t *v)
+{
+	return *((volatile int *)(&(v->counter)));
+}
+
+/**
+ * atomic_set - set atomic variable
+ * @v: pointer of type atomic_t
+ * @i: required value
+ *
+ * Atomically sets the value of @v to @i.
+ */
+static inline void atomic_set(atomic_t *v, int i)
+{
+	v->counter = i;
+}
+
+/**
+ * atomic_add - add integer to atomic variable
+ * @i: integer value to add
+ * @v: pointer of type atomic_t
+ *
+ * Atomically adds @i to @v.
+ */
+static inline void atomic_add(int i, atomic_t *v)
+{
+	__asm__ __volatile__ (
+		"amoadd.w zero, %1, %0"
+		: "+A" (v->counter)
+		: "r" (i));
+}
+
+/**
+ * atomic_sub - subtract integer from atomic variable
+ * @i: integer value to subtract
+ * @v: pointer of type atomic_t
+ *
+ * Atomically subtracts @i from @v.
+ */
+static inline void atomic_sub(int i, atomic_t *v)
+{
+	atomic_add(-i, v);
+}
+
+/**
+ * atomic_add_return - add integer to atomic variable
+ * @i: integer value to add
+ * @v: pointer of type atomic_t
+ *
+ * Atomically adds @i to @v and returns the result
+ */
+static inline int atomic_add_return(int i, atomic_t *v)
+{
+	register int c;
+	__asm__ __volatile__ (
+		"amoadd.w %0, %2, %1"
+		: "=r" (c), "+A" (v->counter)
+		: "r" (i));
+	return (c + i);
+}
+
+/**
+ * atomic_sub_return - subtract integer from atomic variable
+ * @i: integer value to subtract
+ * @v: pointer of type atomic_t
+ *
+ * Atomically subtracts @i from @v and returns the result
+ */
+static inline int atomic_sub_return(int i, atomic_t *v)
+{
+	return atomic_add_return(-i, v);
+}
+
+/**
+ * atomic_inc - increment atomic variable
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1.
+ */
+static inline void atomic_inc(atomic_t *v)
+{
+	atomic_add(1, v);
+}
+
+/**
+ * atomic_dec - decrement atomic variable
+ * @v: pointer of type atomic_t
+ *
+ * Atomically decrements @v by 1.
+ */
+static inline void atomic_dec(atomic_t *v)
+{
+	atomic_add(-1, v);
+}
+
+static inline int atomic_inc_return(atomic_t *v)
+{
+	return atomic_add_return(1, v);
+}
+
+static inline int atomic_dec_return(atomic_t *v)
+{
+	return atomic_sub_return(1, v);
+}
+
+/**
+ * atomic_sub_and_test - subtract value from variable and test result
+ * @i: integer value to subtract
+ * @v: pointer of type atomic_t
+ *
+ * Atomically subtracts @i from @v and returns
+ * true if the result is zero, or false for all
+ * other cases.
+ */
+static inline int atomic_sub_and_test(int i, atomic_t *v)
+{
+	return (atomic_sub_return(i, v) == 0);
+}
+
+/**
+ * atomic_inc_and_test - increment and test
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1
+ * and returns true if the result is zero, or false for all
+ * other cases.
+ */
+static inline int atomic_inc_and_test(atomic_t *v)
+{
+	return (atomic_inc_return(v) == 0);
+}
+
+/**
+ * atomic_dec_and_test - decrement and test
+ * @v: pointer of type atomic_t
+ *
+ * Atomically decrements @v by 1 and
+ * returns true if the result is 0, or false for all other
+ * cases.
+ */
+static inline int atomic_dec_and_test(atomic_t *v)
+{
+	return (atomic_dec_return(v) == 0);
+}
+
+/**
+ * atomic_add_negative - add and test if negative
+ * @i: integer value to add
+ * @v: pointer of type atomic_t
+ * 
+ * Atomically adds @i to @v and returns true
+ * if the result is negative, or false when
+ * result is greater than or equal to zero.
+ */
+static inline int atomic_add_negative(int i, atomic_t *v)
+{
+	return (atomic_add_return(i, v) < 0);
+}
+
+
+static inline int atomic_xchg(atomic_t *v, int n)
+{
+	register int c;
+	__asm__ __volatile__ (
+		"amoswap.w %0, %2, %1"
+		: "=r" (c), "+A" (v->counter)
+		: "r" (n));
+	return c;
+}
+
+static inline int atomic_cmpxchg(atomic_t *v, int o, int n)
+{
+	return cmpxchg(&(v->counter), o, n);
+}
+
+/**
+ * __atomic_add_unless - add unless the number is already a given value
+ * @v: pointer of type atomic_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, so long as @v was not already @u.
+ * Returns the old value of @v.
+ */
+static inline int __atomic_add_unless(atomic_t *v, int a, int u)
+{
+	register int prev, rc;
+	__asm__ __volatile__ (
+	"0:"
+		"lr.w %0, %2\n"
+		"beq  %0, %4, 1f\n"
+		"add  %1, %0, %3\n"
+		"sc.w %1, %1, %2\n"
+		"bnez %1, 0b\n"
+	"1:"
+		: "=&r" (prev), "=&r" (rc), "+A" (v->counter)
+		: "r" (a), "r" (u));
+	return prev;
+}
+
+/**
+ * atomic_and - Atomically clear bits in atomic variable
+ * @mask: Mask of the bits to be retained
+ * @v: pointer of type atomic_t
+ *
+ * Atomically retains the bits set in @mask from @v
+ */
+static inline void atomic_and(unsigned int mask, atomic_t *v)
+{
+	__asm__ __volatile__ (
+		"amoand.w zero, %1, %0"
+		: "+A" (v->counter)
+		: "r" (mask));
+}
+
+/**
+ * atomic_or - Atomically set bits in atomic variable
+ * @mask: Mask of the bits to be set
+ * @v: pointer of type atomic_t
+ *
+ * Atomically sets the bits set in @mask in @v
+ */
+static inline void atomic_or(unsigned int mask, atomic_t *v)
+{
+	__asm__ __volatile__ (
+		"amoor.w zero, %1, %0"
+		: "+A" (v->counter)
+		: "r" (mask));
+}
+
+/**
+ * atomic_xor - Atomically flips bits in atomic variable
+ * @mask: Mask of the bits to be flipped
+ * @v: pointer of type atomic_t
+ *
+ * Atomically flips the bits set in @mask in @v
+ */
+static inline void atomic_xor(unsigned int mask, atomic_t *v)
+{
+	__asm__ __volatile__ (
+		"amoxor.w zero, %1, %0"
+		: "+A" (v->counter)
+		: "r" (mask));
+}
+
+/* Assume that atomic operations are already serializing */
+#define smp_mb__before_atomic_dec()	barrier()
+#define smp_mb__after_atomic_dec()	barrier()
+#define smp_mb__before_atomic_inc()	barrier()
+#define smp_mb__after_atomic_inc()	barrier()
+
+#else /* !CONFIG_RV_ATOMIC */
+
+#include <asm-generic/atomic.h>
+
+#endif /* CONFIG_RV_ATOMIC */
+
+#include <asm/atomic64.h>
+
+#endif /* _ASM_RISCV_ATOMIC_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/barrier.h linux-4.6.2.riscv/arch/riscv/include/asm/barrier.h
--- linux-4.6.2/arch/riscv/include/asm/barrier.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/barrier.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,14 @@
+#ifndef _ASM_RISCV_BARRIER_H
+#define _ASM_RISCV_BARRIER_H
+
+#ifndef __ASSEMBLY__
+
+#define nop()	__asm__ __volatile__ ("nop")
+
+#define mb()	__asm__ __volatile__ ("fence" : : : "memory")
+
+#include <asm-generic/barrier.h>
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_RISCV_BARRIER_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/bitops.h linux-4.6.2.riscv/arch/riscv/include/asm/bitops.h
--- linux-4.6.2/arch/riscv/include/asm/bitops.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/bitops.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,271 @@
+#ifndef _ASM_RISCV_BITOPS_H
+#define _ASM_RISCV_BITOPS_H
+
+#ifndef _LINUX_BITOPS_H
+#error "Only <linux/bitops.h> can be included directly"
+#endif /* _LINUX_BITOPS_H */
+
+#ifdef __KERNEL__
+
+#include <linux/compiler.h>
+#include <linux/irqflags.h>
+#include <asm/barrier.h>
+#include <asm/bitsperlong.h>
+
+#ifdef CONFIG_RV_ATOMIC
+
+#ifndef smp_mb__before_clear_bit
+#define smp_mb__before_clear_bit()  smp_mb()
+#define smp_mb__after_clear_bit()   smp_mb()
+#endif /* smp_mb__before_clear_bit */
+
+/**
+ * __ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ */
+/*
+static __always_inline unsigned long __ffs(unsigned long word)
+{
+	return 0;
+}
+*/
+#include <asm-generic/bitops/__ffs.h>
+
+#include <asm-generic/bitops/ffz.h>
+
+/**
+ * fls - find last (most-significant) bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+/*
+static __always_inline int fls(int x)
+{
+	return 0;
+}
+*/
+#include <asm-generic/bitops/fls.h>
+
+/**
+ * __fls - find last (most-significant) set bit in a long word
+ * @word: the word to search
+ *
+ * Undefined if no set bit exists, so code should check against 0 first.
+ */
+/*
+static __always_inline unsigned long __fls(unsigned long word)
+{
+	return 0;
+}
+*/
+#include <asm-generic/bitops/__fls.h>
+
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/find.h>
+#include <asm-generic/bitops/sched.h>
+
+/**
+ * ffs - find first bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ */
+/*
+static __always_inline int ffs(int x)
+{
+	return 0;
+}
+*/
+#include <asm-generic/bitops/ffs.h>
+
+#include <asm-generic/bitops/hweight.h>
+
+#if (BITS_PER_LONG == 64)
+#define __AMO(op)	"amo" #op ".d"
+#elif (BITS_PER_LONG == 32)
+#define __AMO(op)	"amo" #op ".w"
+#else
+#error "Unexpected BITS_PER_LONG"
+#endif
+
+#define __test_and_op_bit(op, mod, nr, addr)			\
+({								\
+	unsigned long __res, __mask;				\
+	__mask = BIT_MASK(nr);					\
+	__asm__ __volatile__ (					\
+		__AMO(op) " %0, %2, %1"				\
+		: "=r" (__res), "+A" (addr[BIT_WORD(nr)])	\
+		: "r" (mod(__mask)));				\
+	((__res & __mask) != 0);				\
+})
+
+#define __op_bit(op, mod, nr, addr)				\
+	__asm__ __volatile__ (					\
+		__AMO(op) " zero, %1, %0"			\
+		: "+A" (addr[BIT_WORD(nr)])			\
+		: "r" (mod(BIT_MASK(nr))))
+
+/* Bitmask modifiers */
+#define __NOP(x)	(x)
+#define __NOT(x)	(~(x))
+
+/**
+ * test_and_set_bit - Set a bit and return its old value
+ * @nr: Bit to set
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.
+ * It may be reordered on other architectures than x86.
+ * It also implies a memory barrier.
+ */
+static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
+{
+	return __test_and_op_bit(or, __NOP, nr, addr);
+}
+
+/**
+ * test_and_clear_bit - Clear a bit and return its old value
+ * @nr: Bit to clear
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.
+ * It can be reordered on other architectures other than x86.
+ * It also implies a memory barrier.
+ */
+static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
+{
+	return __test_and_op_bit(and, __NOT, nr, addr);
+}
+
+/**
+ * test_and_change_bit - Change a bit and return its old value
+ * @nr: Bit to change
+ * @addr: Address to count from
+ *
+ * This operation is atomic and cannot be reordered.
+ * It also implies a memory barrier.
+ */
+static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
+{
+	return __test_and_op_bit(xor, __NOP, nr, addr);
+}
+
+/**
+ * set_bit - Atomically set a bit in memory
+ * @nr: the bit to set
+ * @addr: the address to start counting from
+ *
+ * This function is atomic and may not be reordered.  See __set_bit()
+ * if you do not require the atomic guarantees.
+ *
+ * Note: there are no guarantees that this function will not be reordered
+ * on non x86 architectures, so if you are writing portable code,
+ * make sure not to rely on its reordering guarantees.
+ *
+ * Note that @nr may be almost arbitrarily large; this function is not
+ * restricted to acting on a single-word quantity.
+ */
+static inline void set_bit(int nr, volatile unsigned long *addr)
+{
+	__op_bit(or, __NOP, nr, addr);
+}
+
+/**
+ * clear_bit - Clears a bit in memory
+ * @nr: Bit to clear
+ * @addr: Address to start counting from
+ *
+ * clear_bit() is atomic and may not be reordered.  However, it does
+ * not contain a memory barrier, so if it is used for locking purposes,
+ * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * in order to ensure changes are visible on other processors.
+ */
+static inline void clear_bit(int nr, volatile unsigned long *addr)
+{
+	__op_bit(and, __NOT, nr, addr);
+}
+
+/**
+ * change_bit - Toggle a bit in memory
+ * @nr: Bit to change
+ * @addr: Address to start counting from
+ *
+ * change_bit() is atomic and may not be reordered. It may be
+ * reordered on other architectures than x86.
+ * Note that @nr may be almost arbitrarily large; this function is not
+ * restricted to acting on a single-word quantity.
+ */
+static inline void change_bit(int nr, volatile unsigned long *addr)
+{
+	__op_bit(xor, __NOP, nr, addr);
+}
+
+/**
+ * test_and_set_bit_lock - Set a bit and return its old value, for lock
+ * @nr: Bit to set
+ * @addr: Address to count from
+ *
+ * This operation is atomic and provides acquire barrier semantics.
+ * It can be used to implement bit locks.
+ */
+static inline int test_and_set_bit_lock(
+	unsigned long nr, volatile unsigned long *addr)
+{
+	return test_and_set_bit(nr, addr);
+}
+
+/**
+ * clear_bit_unlock - Clear a bit in memory, for unlock
+ * @nr: the bit to set
+ * @addr: the address to start counting from
+ *
+ * This operation is atomic and provides release barrier semantics.
+ */
+static inline void clear_bit_unlock(
+	unsigned long nr, volatile unsigned long *addr)
+{
+	clear_bit(nr, addr);
+}
+
+/**
+ * __clear_bit_unlock - Clear a bit in memory, for unlock
+ * @nr: the bit to set
+ * @addr: the address to start counting from
+ *
+ * This operation is like clear_bit_unlock, however it is not atomic.
+ * It does provide release barrier semantics so it can be used to unlock
+ * a bit lock, however it would only be used if no other CPU can modify
+ * any bits in the memory until the lock is released (a good example is
+ * if the bit lock itself protects access to the other bits in the word).
+ */
+static inline void __clear_bit_unlock(
+	unsigned long nr, volatile unsigned long *addr)
+{
+	clear_bit(nr, addr);
+}
+
+#undef __test_and_op_bit
+#undef __op_bit
+#undef __NOP
+#undef __NOT
+#undef __AMO
+
+#include <asm-generic/bitops/non-atomic.h>
+#include <asm-generic/bitops/le.h>
+#include <asm-generic/bitops/ext2-atomic.h>
+
+#else /* !CONFIG_RV_ATOMIC */
+
+#include <asm-generic/bitops.h>
+
+#endif /* CONFIG_RV_ATOMIC */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_RISCV_BITOPS_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/bug.h linux-4.6.2.riscv/arch/riscv/include/asm/bug.h
--- linux-4.6.2/arch/riscv/include/asm/bug.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/bug.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,67 @@
+#ifndef _ASM_RISCV_BUG_H
+#define _ASM_RISCV_BUG_H
+
+#include <linux/compiler.h>
+#include <linux/const.h>
+#include <linux/types.h>
+
+#include <asm/asm.h>
+
+#ifdef CONFIG_GENERIC_BUG
+#define __BUG_INSN	_AC(0x00100073,UL) /* sbreak */
+
+#ifndef __ASSEMBLY__
+typedef u32 bug_insn_t;
+
+#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
+#define __BUG_ENTRY_ADDR	INT " 1b - 2b"
+#define __BUG_ENTRY_FILE	INT " %0 - 2b"
+#else
+#define __BUG_ENTRY_ADDR	PTR " 1b"
+#define __BUG_ENTRY_FILE	PTR " %0"
+#endif
+
+#ifdef CONFIG_DEBUG_BUGVERBOSE
+#define __BUG_ENTRY			\
+	__BUG_ENTRY_ADDR "\n\t"		\
+	__BUG_ENTRY_FILE "\n\t"		\
+	SHORT " %1"
+#else
+#define __BUG_ENTRY			\
+	__BUG_ENTRY_ADDR
+#endif
+
+#define BUG()							\
+do {								\
+	__asm__ __volatile__ (					\
+		"1:\n\t"					\
+			"sbreak\n"				\
+			".pushsection __bug_table,\"a\"\n\t"	\
+		"2:\n\t"					\
+			__BUG_ENTRY "\n\t"			\
+			".org 2b + %2\n\t"			\
+			".popsection"				\
+		:						\
+		: "i" (__FILE__), "i" (__LINE__),		\
+		  "i" (sizeof(struct bug_entry)));		\
+	unreachable();						\
+} while (0)
+
+#define HAVE_ARCH_BUG
+#endif /* !__ASSEMBLY__ */
+#endif /* CONFIG_GENERIC_BUG */
+
+#include <asm-generic/bug.h>
+
+#ifndef __ASSEMBLY__
+
+struct pt_regs;
+struct task_struct;
+
+extern void die(struct pt_regs *regs, const char *str);
+extern void do_trap(struct pt_regs *regs, int signo, int code,
+	unsigned long addr, struct task_struct *tsk);
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_RISCV_BUG_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/cacheflush.h linux-4.6.2.riscv/arch/riscv/include/asm/cacheflush.h
--- linux-4.6.2/arch/riscv/include/asm/cacheflush.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/cacheflush.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,26 @@
+#ifndef _ASM_RISCV_CACHEFLUSH_H
+#define _ASM_RISCV_CACHEFLUSH_H
+
+#include <asm-generic/cacheflush.h>
+
+#undef flush_icache_range
+#undef flush_icache_user_range
+
+static inline void local_flush_icache_all(void)
+{
+	asm volatile ("fence.i" ::: "memory");
+}
+
+#ifndef CONFIG_SMP
+
+#define flush_icache_range(start, end) local_flush_icache_all()
+#define flush_icache_user_range(vma, pg, addr, len) local_flush_icache_all()
+
+#else /* CONFIG_SMP */
+
+#define flush_icache_range(start, end) sbi_remote_fence_i(0)
+#define flush_icache_user_range(vma, pg, addr, len) sbi_remote_fence_i(0)
+
+#endif /* CONFIG_SMP */
+
+#endif /* _ASM_RISCV_CACHEFLUSH_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/cache.h linux-4.6.2.riscv/arch/riscv/include/asm/cache.h
--- linux-4.6.2/arch/riscv/include/asm/cache.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/cache.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,12 @@
+#ifndef _ASM_RISCV_CACHE_H
+#define _ASM_RISCV_CACHE_H
+
+#if defined(CONFIG_CPU_RV_ROCKET)
+#define L1_CACHE_SHIFT		6
+#else
+#define L1_CACHE_SHIFT		5
+#endif
+
+#define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
+
+#endif /* _ASM_RISCV_CACHE_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/cmpxchg.h linux-4.6.2.riscv/arch/riscv/include/asm/cmpxchg.h
--- linux-4.6.2/arch/riscv/include/asm/cmpxchg.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/cmpxchg.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,111 @@
+#ifndef _ASM_RISCV_CMPXCHG_H
+#define _ASM_RISCV_CMPXCHG_H
+
+#include <linux/bug.h>
+
+#ifdef CONFIG_RV_ATOMIC
+
+#include <asm/barrier.h>
+
+#define __xchg(new, ptr, size)					\
+({								\
+	__typeof__(ptr) __ptr = (ptr);				\
+	__typeof__(new) __new = (new);				\
+	__typeof__(*(ptr)) __ret;				\
+	switch (size) {						\
+	case 4:							\
+		__asm__ __volatile__ (				\
+			"amoswap.w %0, %2, %1"			\
+			: "=r" (__ret), "+A" (*__ptr)		\
+			: "r" (__new));				\
+		break;						\
+	case 8:							\
+		__asm__ __volatile__ (				\
+			"amoswap.d %0, %2, %1"			\
+			: "=r" (__ret), "+A" (*__ptr)		\
+			: "r" (__new));				\
+		break;						\
+	default:						\
+		BUILD_BUG();					\
+	}							\
+	__ret;							\
+})
+
+#define xchg(ptr, x)    (__xchg((x), (ptr), sizeof(*(ptr))))
+
+
+/*
+ * Atomic compare and exchange.  Compare OLD with MEM, if identical,
+ * store NEW in MEM.  Return the initial value in MEM.  Success is
+ * indicated by comparing RETURN with OLD.
+ */
+#define __cmpxchg(ptr, old, new, size)					\
+({									\
+	__typeof__(ptr) __ptr = (ptr);					\
+	__typeof__(old) __old = (old);					\
+	__typeof__(new) __new = (new);					\
+	__typeof__(*(ptr)) __ret;					\
+	register unsigned int __rc;					\
+	switch (size) {							\
+	case 4:								\
+		__asm__ __volatile__ (					\
+		"0:"							\
+			"lr.w %0, %2\n"					\
+			"bne  %0, %z3, 1f\n"				\
+			"sc.w %1, %z4, %2\n"				\
+			"bnez %1, 0b\n"					\
+		"1:"							\
+			: "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr)	\
+			: "rJ" (__old), "rJ" (__new));			\
+		break;							\
+	case 8:								\
+		__asm__ __volatile__ (					\
+		"0:"							\
+			"lr.d %0, %2\n"					\
+			"bne  %0, %z3, 1f\n"				\
+			"sc.d %1, %z4, %2\n"				\
+			"bnez %1, 0b\n"					\
+		"1:"							\
+			: "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr)	\
+			: "rJ" (__old), "rJ" (__new));			\
+		break;							\
+	default:							\
+		BUILD_BUG();						\
+	}								\
+	__ret;								\
+})
+
+#define __cmpxchg_mb(ptr, old, new, size) 			\
+({								\
+	__typeof__(*(ptr)) __ret;				\
+	smp_mb();						\
+	__ret = __cmpxchg((ptr), (old), (new), (size));		\
+	smp_mb();						\
+	__ret;							\
+})
+
+#define cmpxchg(ptr, o, n) \
+	(__cmpxchg_mb((ptr), (o), (n), sizeof(*(ptr))))
+
+#define cmpxchg_local(ptr, o, n) \
+	(__cmpxchg((ptr), (o), (n), sizeof(*(ptr))))
+
+#define cmpxchg64(ptr, o, n)			\
+({						\
+	BUILD_BUG_ON(sizeof(*(ptr)) != 8);	\
+	cmpxchg((ptr), (o), (n));		\
+})
+
+#define cmpxchg64_local(ptr, o, n)		\
+({						\
+	BUILD_BUG_ON(sizeof(*(ptr)) != 8);	\
+	cmpxchg_local((ptr), (o), (n));		\
+})
+
+#else /* !CONFIG_RV_ATOMIC */
+
+#include <asm-generic/cmpxchg.h>
+
+#endif /* CONFIG_RV_ATOMIC */
+
+#endif /* _ASM_RISCV_CMPXCHG_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/csr.h linux-4.6.2.riscv/arch/riscv/include/asm/csr.h
--- linux-4.6.2/arch/riscv/include/asm/csr.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/csr.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,137 @@
+#ifndef _ASM_RISCV_CSR_H
+#define _ASM_RISCV_CSR_H
+
+#include <linux/const.h>
+
+/* Status register flags */
+#define SR_IE   _AC(0x00000002,UL) /* Interrupt Enable */
+#define SR_PIE  _AC(0x00000020,UL) /* Previous IE */
+#define SR_PS   _AC(0x00000100,UL) /* Previously Supervisor */
+#define SR_PUM  _AC(0x00040000,UL) /* Protect User Memory */
+
+#define SR_FS           _AC(0x00006000,UL) /* Floating-point Status */
+#define SR_FS_OFF       _AC(0x00000000,UL)
+#define SR_FS_INITIAL   _AC(0x00002000,UL)
+#define SR_FS_CLEAN     _AC(0x00004000,UL)
+#define SR_FS_DIRTY     _AC(0x00006000,UL)
+
+#define SR_XS           _AC(0x00018000,UL) /* Extension Status */
+#define SR_XS_OFF       _AC(0x00000000,UL)
+#define SR_XS_INITIAL   _AC(0x00008000,UL)
+#define SR_XS_CLEAN     _AC(0x00010000,UL)
+#define SR_XS_DIRTY     _AC(0x00018000,UL)
+
+#ifndef CONFIG_64BIT
+#define SR_SD   _AC(0x80000000,UL) /* FS/XS dirty */
+#else
+#define SR_SD   _AC(0x8000000000000000,UL) /* FS/XS dirty */
+#endif
+
+/* Interrupt Enable and Interrupt Pending flags */
+#define SIE_SSIE _AC(0x00000002,UL) /* Software Interrupt Enable */
+#define SIE_STIE _AC(0x00000020,UL) /* Timer Interrupt Enable */
+
+#define EXC_INST_MISALIGNED     0
+#define EXC_INST_ACCESS         1
+#define EXC_BREAKPOINT          3
+#define EXC_LOAD_ACCESS         5
+#define EXC_STORE_ACCESS        7
+#define EXC_SYSCALL             8
+
+#ifndef __ASSEMBLY__
+
+#define CSR_ZIMM(val) \
+	(__builtin_constant_p(val) && ((unsigned long)(val) < 0x20))
+
+#define csr_swap(csr,val)					\
+({								\
+	unsigned long __v = (unsigned long)(val);		\
+	if (CSR_ZIMM(__v)) { 					\
+		__asm__ __volatile__ (				\
+			"csrrw %0, " #csr ", %1"		\
+			: "=r" (__v) : "i" (__v));		\
+	} else {						\
+		__asm__ __volatile__ (				\
+			"csrrw %0, " #csr ", %1"		\
+			: "=r" (__v) : "r" (__v));		\
+	}							\
+	__v;							\
+})
+
+#define csr_read(csr)						\
+({								\
+	register unsigned long __v;				\
+	__asm__ __volatile__ (					\
+		"csrr %0, " #csr : "=r" (__v));			\
+	__v;							\
+})
+
+#define csr_write(csr,val)					\
+({								\
+	unsigned long __v = (unsigned long)(val);		\
+	if (CSR_ZIMM(__v)) {					\
+		__asm__ __volatile__ (				\
+			"csrw " #csr ", %0" : : "i" (__v));	\
+	} else {						\
+		__asm__ __volatile__ (				\
+			"csrw " #csr ", %0" : : "r" (__v));	\
+	}							\
+})
+
+#define csr_read_set(csr,val)					\
+({								\
+	unsigned long __v = (unsigned long)(val);		\
+	if (CSR_ZIMM(val)) {					\
+		__asm__ __volatile__ (				\
+			"csrrs %0, " #csr ", %1"		\
+			: "=r" (__v) : "i" (__v));		\
+	} else {						\
+		__asm__ __volatile__ (				\
+			"csrrs %0, " #csr ", %1"		\
+			: "=r" (__v) : "r" (__v));		\
+	}							\
+	__v;							\
+})
+
+#define csr_set(csr,val)					\
+({								\
+	unsigned long __v = (unsigned long)(val);		\
+	if (CSR_ZIMM(__v)) {					\
+		__asm__ __volatile__ (				\
+			"csrs " #csr ", %0" : : "i" (__v));	\
+	} else {						\
+		__asm__ __volatile__ (				\
+			"csrs " #csr ", %0" : : "r" (__v));	\
+	}							\
+})
+
+#define csr_read_clear(csr,val)					\
+({								\
+	unsigned long __v = (unsigned long)(val);		\
+	if (CSR_ZIMM(__v)) {					\
+		__asm__ __volatile__ (				\
+			"csrrc %0, " #csr ", %1"		\
+			: "=r" (__v) : "i" (__v));		\
+	} else {						\
+		__asm__ __volatile__ (				\
+			"csrrc %0, " #csr ", %1"		\
+			: "=r" (__v) : "r" (__v));		\
+	}							\
+	__v;							\
+})
+
+#define csr_clear(csr,val)					\
+({								\
+	unsigned long __v = (unsigned long)(val);		\
+	if (CSR_ZIMM(__v)) {					\
+		__asm__ __volatile__ (				\
+			"csrc " #csr ", %0" : : "i" (__v));	\
+	} else {						\
+		__asm__ __volatile__ (				\
+			"csrc " #csr ", %0" : : "r" (__v));	\
+	}							\
+})
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_RISCV_CSR_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/current.h linux-4.6.2.riscv/arch/riscv/include/asm/current.h
--- linux-4.6.2/arch/riscv/include/asm/current.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/current.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,16 @@
+#ifndef _ASM_RISCV_CURRENT_H
+#define _ASM_RISCV_CURRENT_H
+
+#include <asm/csr.h>
+
+struct task_struct;
+
+static inline struct task_struct *get_current(void)
+{
+	register struct task_struct * tp asm("tp");
+	return tp;
+}
+
+#define current (get_current())
+
+#endif /* _ASM_RISCV_CURRENT_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/delay.h linux-4.6.2.riscv/arch/riscv/include/asm/delay.h
--- linux-4.6.2/arch/riscv/include/asm/delay.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/delay.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,14 @@
+#ifndef _ASM_RISCV_DELAY_H
+#define _ASM_RISCV_DELAY_H
+
+extern unsigned long timebase;
+
+#define udelay udelay
+extern void udelay(unsigned long usecs);
+
+#define ndelay ndelay
+extern void ndelay(unsigned long nsecs);
+
+extern void __delay(unsigned long cycles);
+
+#endif /* _ASM_RISCV_DELAY_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/device.h linux-4.6.2.riscv/arch/riscv/include/asm/device.h
--- linux-4.6.2/arch/riscv/include/asm/device.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/device.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,13 @@
+#ifndef _ASM_RISCV_DEVICE_H
+#define _ASM_RISCV_DEVICE_H
+
+#include <linux/sysfs.h>
+
+struct dev_archdata {
+	struct dma_map_ops *dma_ops;
+};
+
+struct pdev_archdata {
+};
+
+#endif /* _ASM_RISCV_DEVICE_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/dma-mapping.h linux-4.6.2.riscv/arch/riscv/include/asm/dma-mapping.h
--- linux-4.6.2/arch/riscv/include/asm/dma-mapping.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/dma-mapping.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2003-2004 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2012 ARM Ltd.
+ * Copyright (C) 2016 SiFive, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_RISCV_DMA_MAPPING_H
+#define __ASM_RISCV_DMA_MAPPING_H
+
+#ifdef __KERNEL__
+
+/* Use ops->dma_mapping_error (if it exists) or assume success */
+// #undef DMA_ERROR_CODE
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+	if (unlikely(dev->archdata.dma_ops))
+		return dev->archdata.dma_ops;
+	else
+		return &dma_noop_ops;
+}
+
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+	if (!dev->dma_mask)
+		return false;
+
+	return addr + size - 1 <= *dev->dma_mask;
+}
+
+static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+	return (dma_addr_t)paddr;
+}
+
+static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
+{
+	return (phys_addr_t)dev_addr;
+}
+
+static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction dir)
+{
+	/*
+	 * RISC-V is cache-coherent, so this is mostly a no-op.  However, we do need to
+	 * ensure that dma_cache_sync() enforces order, hence the mb().
+	 */
+	mb();
+}
+
+#endif	/* __KERNEL__ */
+#endif	/* __ASM_RISCV_DMA_MAPPING_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/elf.h linux-4.6.2.riscv/arch/riscv/include/asm/elf.h
--- linux-4.6.2/arch/riscv/include/asm/elf.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/elf.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,72 @@
+#ifndef _ASM_RISCV_ELF_H
+#define _ASM_RISCV_ELF_H
+
+#include <uapi/asm/elf.h>
+#include <asm/auxvec.h>
+#include <asm/byteorder.h>
+
+/* TODO: Move definition into include/uapi/linux/elf-em.h */
+#define EM_RISCV	0xF3
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_ARCH	EM_RISCV
+
+#ifdef CONFIG_64BIT
+#define ELF_CLASS	ELFCLASS64
+#else
+#define ELF_CLASS	ELFCLASS32
+#endif
+
+#if defined(__LITTLE_ENDIAN)
+#define ELF_DATA	ELFDATA2LSB
+#elif defined(__BIG_ENDIAN)
+#define ELF_DATA	ELFDATA2MSB
+#else
+#error "Unknown endianness"
+#endif
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x) ((x)->e_machine == EM_RISCV)
+
+#define CORE_DUMP_USE_REGSET
+#define ELF_EXEC_PAGESIZE	(PAGE_SIZE)
+
+/*
+ * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
+ * use of this is to invoke "./ld.so someprog" to test out a new version of
+ * the loader.  We need to make sure that it is out of the way of the program
+ * that it will "exec", and that there is sufficient room for the brk.
+ */
+#define ELF_ET_DYN_BASE		((TASK_SIZE / 3) * 2)
+
+/*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this CPU supports.  This could be done in user space,
+ * but it's not easy, and we've already done it here.
+ */
+#define ELF_HWCAP	(0)
+
+/*
+ * This yields a string that ld.so will use to load implementation
+ * specific libraries for optimization.  This is more specific in
+ * intent than poking at uname or /proc/cpuinfo.
+ */
+#define ELF_PLATFORM	(NULL)
+
+#define ARCH_DLINFO						\
+do {								\
+	NEW_AUX_ENT(AT_SYSINFO_EHDR,				\
+		(elf_addr_t)current->mm->context.vdso);		\
+} while (0)
+
+
+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
+struct linux_binprm;
+extern int arch_setup_additional_pages(struct linux_binprm *bprm,
+	int uses_interp);
+
+#endif /* _ASM_RISCV_ELF_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/io.h linux-4.6.2.riscv/arch/riscv/include/asm/io.h
--- linux-4.6.2/arch/riscv/include/asm/io.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/io.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,63 @@
+#ifndef _ASM_RISCV_IO_H
+#define _ASM_RISCV_IO_H
+
+#include <asm-generic/io.h>
+
+#ifdef __KERNEL__
+
+#ifdef CONFIG_MMU
+
+extern void __iomem *ioremap(phys_addr_t offset, unsigned long size);
+
+/*
+ * ioremap_nocache     -   map bus memory into CPU space
+ * @offset:    bus address of the memory
+ * @size:      size of the resource to map
+ *
+ * ioremap_nocache performs a platform specific sequence of operations to
+ * make bus memory CPU accessible via the readb/readw/readl/writeb/
+ * writew/writel functions and the other mmio helpers. The returned
+ * address is not guaranteed to be usable directly as a virtual
+ * address.
+ *
+ * This version of ioremap ensures that the memory is marked uncachable
+ * on the CPU as well as honouring existing caching rules from things like
+ * the PCI bus. Note that there are other caches and buffers on many
+ * busses. In particular driver authors should read up on PCI writes.
+ *
+ * It's useful if some control registers are in such an area and
+ * write combining or read caching is not desirable.
+ *
+ * Must be freed with iounmap.
+ */
+static inline void __iomem *ioremap_nocache(
+	phys_addr_t offset, unsigned long size)
+{
+	return ioremap(offset, size);
+}
+
+/**
+ * ioremap_wc	-	map memory into CPU space write combined
+ * @offset:	bus address of the memory
+ * @size:	size of the resource to map
+ *
+ * This version of ioremap ensures that the memory is marked write combining.
+ * Write combining allows faster writes to some hardware devices.
+ *
+ * Must be freed with iounmap.
+ */
+static inline void __iomem *ioremap_wc(
+	phys_addr_t offset, unsigned long size)
+{
+	return ioremap(offset, size);
+}
+
+#define ioremap_wt ioremap_nocache
+
+extern void iounmap(void __iomem *addr);
+
+#endif /* CONFIG_MMU */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_RISCV_IO_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/irqflags.h linux-4.6.2.riscv/arch/riscv/include/asm/irqflags.h
--- linux-4.6.2/arch/riscv/include/asm/irqflags.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/irqflags.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,49 @@
+#ifndef _ASM_RISCV_IRQFLAGS_H
+#define _ASM_RISCV_IRQFLAGS_H
+
+#include <asm/processor.h>
+#include <asm/csr.h>
+
+/* read interrupt enabled status */
+static inline unsigned long arch_local_save_flags(void)
+{
+	return csr_read(sstatus);
+}
+
+/* unconditionally enable interrupts */
+static inline void arch_local_irq_enable(void)
+{
+	csr_set(sstatus, SR_IE);
+}
+
+/* unconditionally disable interrupts */
+static inline void arch_local_irq_disable(void)
+{
+	csr_clear(sstatus, SR_IE);
+}
+
+/* get status and disable interrupts */
+static inline unsigned long arch_local_irq_save(void)
+{
+	return csr_read_clear(sstatus, SR_IE);
+}
+
+/* test flags */
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+	return !(flags & SR_IE);
+}
+
+/* test hardware interrupt enable bit */
+static inline int arch_irqs_disabled(void)
+{
+	return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+/* set interrupt enabled status */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+	csr_set(sstatus, flags & SR_IE);
+}
+
+#endif /* _ASM_RISCV_IRQFLAGS_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/irq.h linux-4.6.2.riscv/arch/riscv/include/asm/irq.h
--- linux-4.6.2/arch/riscv/include/asm/irq.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/irq.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,14 @@
+#ifndef _ASM_RISCV_IRQ_H
+#define _ASM_RISCV_IRQ_H
+
+#define NR_IRQS         0
+
+#define INTERRUPT_CAUSE_SOFTWARE    1
+#define INTERRUPT_CAUSE_TIMER       5
+#define INTERRUPT_CAUSE_EXTERNAL    9
+
+void riscv_timer_interrupt(void);
+
+#include <asm-generic/irq.h>
+
+#endif /* _ASM_RISCV_IRQ_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/Kbuild linux-4.6.2.riscv/arch/riscv/include/asm/Kbuild
--- linux-4.6.2/arch/riscv/include/asm/Kbuild	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/Kbuild	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1,59 @@
+generic-y += bugs.h
+generic-y += cacheflush.h
+generic-y += checksum.h
+generic-y += clkdev.h
+generic-y += cputime.h
+generic-y += div64.h
+generic-y += dma.h
+generic-y += emergency-restart.h
+generic-y += errno.h
+generic-y += exec.h
+generic-y += fb.h
+generic-y += fcntl.h
+generic-y += ftrace.h
+generic-y += futex.h
+generic-y += hardirq.h
+generic-y += hash.h
+generic-y += hw_irq.h
+generic-y += ioctl.h
+generic-y += ioctls.h
+generic-y += ipcbuf.h
+generic-y += irq_regs.h
+generic-y += irq_work.h
+generic-y += kdebug.h
+generic-y += kmap_types.h
+generic-y += kvm_para.h
+generic-y += local.h
+generic-y += mm-arch-hooks.h
+generic-y += mman.h
+generic-y += module.h
+generic-y += msgbuf.h
+generic-y += mutex.h
+generic-y += param.h
+generic-y += percpu.h
+generic-y += poll.h
+generic-y += posix_types.h
+generic-y += preempt.h
+generic-y += resource.h
+generic-y += scatterlist.h
+generic-y += sections.h
+generic-y += sembuf.h
+generic-y += shmbuf.h
+generic-y += shmparam.h
+generic-y += signal.h
+generic-y += socket.h
+generic-y += sockios.h
+generic-y += stat.h
+generic-y += statfs.h
+generic-y += swab.h
+generic-y += termbits.h
+generic-y += termios.h
+generic-y += topology.h
+generic-y += trace_clock.h
+generic-y += types.h
+generic-y += ucontext.h
+generic-y += unaligned.h
+generic-y += user.h
+generic-y += vga.h
+generic-y += vmlinux.lds.h
+generic-y += xor.h
diff -Nur linux-4.6.2/arch/riscv/include/asm/linkage.h linux-4.6.2.riscv/arch/riscv/include/asm/linkage.h
--- linux-4.6.2/arch/riscv/include/asm/linkage.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/linkage.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,7 @@
+#ifndef _ASM_RISCV_LINKAGE_H
+#define _ASM_RISCV_LINKAGE_H
+
+#define __ALIGN		.balign 4
+#define __ALIGN_STR	".balign 4"
+
+#endif /* _ASM_RISCV_LINKAGE_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/mmu_context.h linux-4.6.2.riscv/arch/riscv/include/asm/mmu_context.h
--- linux-4.6.2/arch/riscv/include/asm/mmu_context.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/mmu_context.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,46 @@
+#ifndef _ASM_RISCV_MMU_CONTEXT_H
+#define _ASM_RISCV_MMU_CONTEXT_H
+
+#include <asm-generic/mm_hooks.h>
+
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <asm/tlbflush.h>
+
+static inline void enter_lazy_tlb(struct mm_struct *mm,
+	struct task_struct *task)
+{
+}
+
+/* Initialize context-related info for a new mm_struct */
+static inline int init_new_context(struct task_struct *task,
+	struct mm_struct *mm)
+{
+	return 0;
+}
+
+static inline void destroy_context(struct mm_struct *mm)
+{
+}
+
+static inline void switch_mm(struct mm_struct *prev,
+	struct mm_struct *next, struct task_struct *task)
+{
+	if (likely(prev != next)) {
+		csr_write(sptbr, virt_to_pfn(next->pgd));
+		local_flush_tlb_all();
+	}
+}
+
+static inline void activate_mm(struct mm_struct *prev,
+			       struct mm_struct *next)
+{
+	switch_mm(prev, next, NULL);
+}
+
+static inline void deactivate_mm(struct task_struct *task,
+	struct mm_struct *mm)
+{
+}
+
+#endif /* _ASM_RISCV_MMU_CONTEXT_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/mmu.h linux-4.6.2.riscv/arch/riscv/include/asm/mmu.h
--- linux-4.6.2/arch/riscv/include/asm/mmu.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/mmu.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,12 @@
+#ifndef _ASM_RISCV_MMU_H
+#define _ASM_RISCV_MMU_H
+
+#ifndef __ASSEMBLY__
+
+typedef struct {
+	void *vdso;
+} mm_context_t;
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_RISCV_MMU_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/page.h linux-4.6.2.riscv/arch/riscv/include/asm/page.h
--- linux-4.6.2/arch/riscv/include/asm/page.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/page.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,119 @@
+#ifndef _ASM_RISCV_PAGE_H
+#define _ASM_RISCV_PAGE_H
+
+#include <linux/pfn.h>
+#include <linux/const.h>
+
+#define PAGE_SHIFT	(12)
+#define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
+#define PAGE_MASK	(~(PAGE_SIZE - 1))
+
+#ifdef __KERNEL__
+
+/*
+ * PAGE_OFFSET -- the first address of the first page of memory.
+ * When not using MMU this corresponds to the first free page in
+ * physical memory (aligned on a page boundary).
+ */
+#ifdef CONFIG_64BIT
+#define PAGE_OFFSET		_AC(0xffffffff80000000,UL)
+#else
+#define PAGE_OFFSET		_AC(0xc0000000,UL)
+#endif
+
+#ifndef __ASSEMBLY__
+
+#define PAGE_UP(addr)	(((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
+#define PAGE_DOWN(addr)	((addr)&(~((PAGE_SIZE)-1)))
+
+/* align addr on a size boundary - adjust address up/down if needed */
+#define _ALIGN_UP(addr, size)	(((addr)+((size)-1))&(~((size)-1)))
+#define _ALIGN_DOWN(addr, size)	((addr)&(~((size)-1)))
+
+/* align addr on a size boundary - adjust address up if needed */
+#define _ALIGN(addr, size)	_ALIGN_UP(addr, size)
+
+#define clear_page(pgaddr)			memset((pgaddr), 0, PAGE_SIZE)
+#define copy_page(to, from)			memcpy((to), (from), PAGE_SIZE)
+
+#define clear_user_page(pgaddr, vaddr, page)	memset((pgaddr), 0, PAGE_SIZE)
+#define copy_user_page(vto, vfrom, vaddr, topg) \
+			memcpy((vto), (vfrom), PAGE_SIZE)
+
+/*
+ * Use struct definitions to apply C type checking
+ */
+
+/* Page Global Directory entry */
+typedef struct {
+	unsigned long pgd;
+} pgd_t;
+
+/* Page Table entry */
+typedef struct {
+	unsigned long pte;
+} pte_t;
+
+typedef struct {
+	unsigned long pgprot;
+} pgprot_t;
+
+typedef struct page *pgtable_t;
+
+#define pte_val(x)	((x).pte)
+#define pgd_val(x)	((x).pgd)
+#define pgprot_val(x)	((x).pgprot)
+
+#define __pte(x)	((pte_t) { (x) })
+#define __pgd(x)	((pgd_t) { (x) })
+#define __pgprot(x)	((pgprot_t) { (x) })
+
+#ifdef CONFIG_64BITS
+#define PTE_FMT "%016lx"
+#else
+#define PTE_FMT "%08lx"
+#endif
+
+extern unsigned long va_pa_offset;
+extern unsigned long pfn_base;
+
+extern unsigned long max_low_pfn;
+extern unsigned long min_low_pfn;
+
+#define __pa(x)		((unsigned long)(x) - va_pa_offset)
+#define __va(x)		((void *)((unsigned long) (x) + va_pa_offset))
+
+#define phys_to_pfn(phys)	(PFN_DOWN(phys))
+#define pfn_to_phys(pfn)	(PFN_PHYS(pfn))
+
+#define virt_to_pfn(vaddr)	(phys_to_pfn(__pa(vaddr)))
+#define pfn_to_virt(pfn)	(__va(pfn_to_phys(pfn)))
+
+#define virt_to_page(vaddr)	(pfn_to_page(virt_to_pfn(vaddr)))
+#define page_to_virt(page)	(pfn_to_virt(page_to_pfn(page)))
+
+#define page_to_phys(page)	(pfn_to_phys(page_to_pfn(page)))
+#define page_to_bus(page)	(page_to_phys(page))
+#define phys_to_page(paddr)	(pfn_to_page(phys_to_pfn(paddr)))
+
+#define pfn_valid(pfn)		(((pfn) >= pfn_base) && (((pfn)-pfn_base) < max_mapnr))
+
+#define ARCH_PFN_OFFSET		(pfn_base)
+
+#endif /* __ASSEMBLY__ */
+
+#define virt_addr_valid(vaddr)	(pfn_valid(virt_to_pfn(vaddr)))
+
+#endif /* __KERNEL__ */
+
+#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/getorder.h>
+
+/* vDSO support */
+/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
+#define __HAVE_ARCH_GATE_AREA
+
+#endif /* _ASM_RISCV_PAGE_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/pci.h linux-4.6.2.riscv/arch/riscv/include/asm/pci.h
--- linux-4.6.2/arch/riscv/include/asm/pci.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/pci.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,37 @@
+#ifndef __ASM_RISCV_PCI_H
+#define __ASM_RISCV_PCI_H
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/io.h>
+
+#define PCIBIOS_MIN_IO		0x1000
+#define PCIBIOS_MIN_MEM		0
+
+/* RISC-V shim does not initialize PCI bus */
+#define pcibios_assign_all_busses() 1
+
+/* RISC-V TileLink and PCIe share the share address space */
+#define PCI_DMA_BUS_IS_PHYS 1
+
+extern int isa_dma_bridge_buggy;
+
+#ifdef CONFIG_PCI
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+	/* no legacy IRQ on risc-v */
+	return -ENODEV;
+}
+
+static inline int pci_proc_domain(struct pci_bus *bus)
+{
+	/* always show the domain in /proc */
+	return 1;
+}
+#endif  /* CONFIG_PCI */
+
+#endif  /* __KERNEL__ */
+#endif  /* __ASM_PCI_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/pgalloc.h linux-4.6.2.riscv/arch/riscv/include/asm/pgalloc.h
--- linux-4.6.2/arch/riscv/include/asm/pgalloc.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/pgalloc.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,107 @@
+#ifndef _ASM_RISCV_PGALLOC_H
+#define _ASM_RISCV_PGALLOC_H
+
+#include <linux/mm.h>
+#include <asm/tlb.h>
+
+static inline void pmd_populate_kernel(struct mm_struct *mm,
+	pmd_t *pmd, pte_t *pte)
+{
+	unsigned long pfn = virt_to_pfn(pte);
+	set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
+}
+
+static inline void pmd_populate(struct mm_struct *mm,
+	pmd_t *pmd, pgtable_t pte)
+{
+	unsigned long pfn = virt_to_pfn(page_address(pte));
+	set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
+}
+
+#ifndef __PAGETABLE_PMD_FOLDED
+static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+{
+	unsigned long pfn = virt_to_pfn(pmd);
+	set_pud(pud, __pud((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
+}
+#endif /* __PAGETABLE_PMD_FOLDED */
+
+#define pmd_pgtable(pmd)	pmd_page(pmd)
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+	pgd_t *pgd;
+
+	pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
+	if (likely(pgd != NULL)) {
+		memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
+		/* Copy kernel mappings */
+		memcpy(pgd + USER_PTRS_PER_PGD,
+			init_mm.pgd + USER_PTRS_PER_PGD,
+			(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+	}
+	return pgd;
+}
+
+static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+	free_page((unsigned long)pgd);
+}
+
+#ifndef __PAGETABLE_PMD_FOLDED
+
+static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
+{
+	return (pmd_t *)__get_free_page(
+		GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
+}
+
+static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+{
+	free_page((unsigned long)pmd);
+}
+
+#define __pmd_free_tlb(tlb, pmd, addr)  pmd_free((tlb)->mm, pmd)
+
+#endif /* __PAGETABLE_PMD_FOLDED */
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+	unsigned long address)
+{
+	return (pte_t *)__get_free_page(
+		GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
+}
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+	unsigned long address)
+{
+	struct page *pte;
+	pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
+	if (likely(pte != NULL)) {
+		pgtable_page_ctor(pte);
+	}
+	return pte;
+}
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+	free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+	pgtable_page_dtor(pte);
+	__free_page(pte);
+}
+
+#define __pte_free_tlb(tlb, pte, buf)   \
+do {                                    \
+	pgtable_page_dtor(pte);         \
+	tlb_remove_page((tlb), pte);    \
+} while (0)
+
+static inline void check_pgt_cache(void)
+{
+}
+
+#endif /* _ASM_RISCV_PGALLOC_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/pgtable-32.h linux-4.6.2.riscv/arch/riscv/include/asm/pgtable-32.h
--- linux-4.6.2/arch/riscv/include/asm/pgtable-32.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/pgtable-32.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,12 @@
+#ifndef _ASM_RISCV_PGTABLE_32_H
+#define _ASM_RISCV_PGTABLE_32_H
+
+#include <asm-generic/pgtable-nopmd.h>
+#include <linux/const.h>
+
+/* Size of region mapped by a page global directory */
+#define PGDIR_SHIFT     22
+#define PGDIR_SIZE      (_AC(1,UL) << PGDIR_SHIFT)
+#define PGDIR_MASK      (~(PGDIR_SIZE - 1))
+
+#endif /* _ASM_RISCV_PGTABLE_32_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/pgtable-64.h linux-4.6.2.riscv/arch/riscv/include/asm/pgtable-64.h
--- linux-4.6.2/arch/riscv/include/asm/pgtable-64.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/pgtable-64.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,66 @@
+#ifndef _ASM_RISCV_PGTABLE_64_H
+#define _ASM_RISCV_PGTABLE_64_H
+
+#include <linux/const.h>
+
+#define PGDIR_SHIFT     30
+/* Size of region mapped by a page global directory */
+#define PGDIR_SIZE      (_AC(1,UL) << PGDIR_SHIFT)
+#define PGDIR_MASK      (~(PGDIR_SIZE - 1))
+
+#define PMD_SHIFT       21
+/* Size of region mapped by a page middle directory */
+#define PMD_SIZE        (_AC(1,UL) << PMD_SHIFT)
+#define PMD_MASK        (~(PMD_SIZE - 1))
+
+/* Page Middle Directory entry */
+typedef struct {
+	unsigned long pmd;
+} pmd_t;
+
+#define pmd_val(x)      ((x).pmd)
+#define __pmd(x)        ((pmd_t) { (x) })
+
+#define PTRS_PER_PMD    (PAGE_SIZE / sizeof(pmd_t))
+
+static inline int pud_present(pud_t pud)
+{
+	return (pud_val(pud) & _PAGE_PRESENT);
+}
+
+static inline int pud_none(pud_t pud)
+{
+	return (pud_val(pud) == 0);
+}
+
+static inline int pud_bad(pud_t pud)
+{
+	return !pud_present(pud);
+}
+
+static inline void set_pud(pud_t *pudp, pud_t pud)
+{
+	*pudp = pud;
+}
+
+static inline void pud_clear(pud_t *pudp)
+{
+	set_pud(pudp, __pud(0));
+}
+
+static inline unsigned long pud_page_vaddr(pud_t pud)
+{
+	return (unsigned long)pfn_to_virt(pud_val(pud) >> _PAGE_PFN_SHIFT);
+}
+
+#define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
+
+static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
+{
+	return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(addr);
+}
+
+#define pmd_ERROR(e) \
+	pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
+
+#endif /* _ASM_RISCV_PGTABLE_64_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/pgtable-bits.h linux-4.6.2.riscv/arch/riscv/include/asm/pgtable-bits.h
--- linux-4.6.2/arch/riscv/include/asm/pgtable-bits.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/pgtable-bits.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,37 @@
+#ifndef _ASM_RISCV_PGTABLE_BITS_H
+#define _ASM_RISCV_PGTABLE_BITS_H
+
+/*
+ * RV32Sv32 page table entry:
+ * | 31 10 | 9             7 | 6 | 5 | 4  1 | 0
+ *    PFN    reserved for SW   D   R   TYPE   V
+ *
+ * RV64Sv39 / RV64Sv48 page table entry:
+ * | 63           48 | 47 10 | 9             7 | 6 | 5 | 4  1 | 0
+ *   reserved for HW    PFN    reserved for SW   D   R   TYPE   V
+ */
+
+#define _PAGE_PRESENT   (1 << 0)
+#define _PAGE_READ      (1 << 1)    /* Readable */
+#define _PAGE_WRITE     (1 << 2)    /* Writable */
+#define _PAGE_EXEC      (1 << 3)    /* Executable */
+#define _PAGE_USER      (1 << 4)    /* User */
+#define _PAGE_GLOBAL    (1 << 5)    /* Global */
+#define _PAGE_ACCESSED  (1 << 6)    /* Set by hardware on any access */
+#define _PAGE_DIRTY     (1 << 7)    /* Set by hardware on any write */
+#define _PAGE_SOFT      (1 << 8)    /* Reserved for software */
+
+#define _PAGE_SPECIAL   _PAGE_SOFT
+#define _PAGE_TABLE     _PAGE_PRESENT
+
+#define _PAGE_PFN_SHIFT 10
+
+/* Set of bits to preserve across pte_modify() */
+#define _PAGE_CHG_MASK  (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ |	\
+					  _PAGE_WRITE | _PAGE_EXEC |	\
+					  _PAGE_USER | _PAGE_GLOBAL))
+
+/* Advertise support for _PAGE_SPECIAL */
+#define __HAVE_ARCH_PTE_SPECIAL
+
+#endif /* _ASM_RISCV_PGTABLE_BITS_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/pgtable.h linux-4.6.2.riscv/arch/riscv/include/asm/pgtable.h
--- linux-4.6.2/arch/riscv/include/asm/pgtable.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/pgtable.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,329 @@
+#ifndef _ASM_RISCV_PGTABLE_H
+#define _ASM_RISCV_PGTABLE_H
+
+#include <linux/mmzone.h>
+
+#include <asm/pgtable-bits.h>
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_MMU
+
+/* Page Upper Directory not used in RISC-V */
+#include <asm-generic/pgtable-nopud.h>
+#include <asm/page.h>
+#include <linux/mm_types.h>
+
+#ifdef CONFIG_64BIT
+#include <asm/pgtable-64.h>
+#else
+#include <asm/pgtable-32.h>
+#endif /* CONFIG_64BIT */
+
+/* Number of entries in the page global directory */
+#define PTRS_PER_PGD    (PAGE_SIZE / sizeof(pgd_t))
+/* Number of entries in the page table */
+#define PTRS_PER_PTE    (PAGE_SIZE / sizeof(pte_t))
+
+/* Number of PGD entries that a user-mode program can use */
+#define USER_PTRS_PER_PGD   (TASK_SIZE / PGDIR_SIZE)
+#define FIRST_USER_ADDRESS  0
+
+/* Page protection bits */
+#define _PAGE_BASE	(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_USER)
+
+#define PAGE_NONE		__pgprot(0)
+#define PAGE_READ		__pgprot(_PAGE_BASE | _PAGE_READ)
+#define PAGE_WRITE		__pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_WRITE)
+#define PAGE_EXEC		__pgprot(_PAGE_BASE | _PAGE_EXEC)
+#define PAGE_READ_EXEC		__pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC)
+#define PAGE_WRITE_EXEC		__pgprot(_PAGE_BASE | _PAGE_READ |	\
+					 _PAGE_EXEC | _PAGE_WRITE)
+
+#define PAGE_COPY		PAGE_READ
+#define PAGE_COPY_EXEC		PAGE_EXEC
+#define PAGE_COPY_READ_EXEC	PAGE_READ_EXEC
+#define PAGE_SHARED		PAGE_WRITE
+#define PAGE_SHARED_EXEC	PAGE_WRITE_EXEC
+
+#define PAGE_KERNEL		__pgprot(_PAGE_READ | _PAGE_WRITE |	\
+					 _PAGE_PRESENT | _PAGE_ACCESSED)
+
+#define swapper_pg_dir NULL
+
+/* MAP_PRIVATE permissions: xwr (copy-on-write) */
+#define __P000	PAGE_NONE
+#define __P001	PAGE_READ
+#define __P010	PAGE_COPY
+#define __P011	PAGE_COPY
+#define __P100	PAGE_EXEC
+#define __P101	PAGE_READ_EXEC
+#define __P110	PAGE_COPY_EXEC
+#define __P111	PAGE_COPY_READ_EXEC
+
+/* MAP_SHARED permissions: xwr */
+#define __S000	PAGE_NONE
+#define __S001	PAGE_READ
+#define __S010	PAGE_SHARED
+#define __S011	PAGE_SHARED
+#define __S100	PAGE_EXEC
+#define __S101	PAGE_READ_EXEC
+#define __S110	PAGE_SHARED_EXEC
+#define __S111	PAGE_SHARED_EXEC
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero,
+ * used for zero-mapped memory areas, etc.
+ */
+extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
+#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+
+static inline int pmd_present(pmd_t pmd)
+{
+	return (pmd_val(pmd) & _PAGE_PRESENT);
+}
+
+static inline int pmd_none(pmd_t pmd)
+{
+	return (pmd_val(pmd) == 0);
+}
+
+static inline int pmd_bad(pmd_t pmd)
+{
+	return !pmd_present(pmd);
+}
+
+static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
+{
+	*pmdp = pmd;
+}
+
+static inline void pmd_clear(pmd_t *pmdp)
+{
+	set_pmd(pmdp, __pmd(0));
+}
+
+
+#define pgd_index(addr) (((addr) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
+
+/* Locate an entry in the page global directory */
+static inline pgd_t *pgd_offset(const struct mm_struct *mm, unsigned long addr)
+{
+	return mm->pgd + pgd_index(addr);
+}
+/* Locate an entry in the kernel page global directory */
+#define pgd_offset_k(addr)      pgd_offset(&init_mm, (addr))
+
+static inline struct page *pmd_page(pmd_t pmd)
+{
+	return pfn_to_page(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
+}
+
+static inline unsigned long pmd_page_vaddr(pmd_t pmd)
+{
+	return (unsigned long)pfn_to_virt(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
+}
+
+/* Yields the page frame number (PFN) of a page table entry */
+static inline unsigned long pte_pfn(pte_t pte)
+{
+	return (pte_val(pte) >> _PAGE_PFN_SHIFT);
+}
+
+#define pte_page(x)     pfn_to_page(pte_pfn(x))
+
+/* Constructs a page table entry */
+static inline pte_t pfn_pte(unsigned long pfn, pgprot_t prot)
+{
+	return __pte((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
+}
+
+static inline pte_t mk_pte(struct page *page, pgprot_t prot)
+{
+	return pfn_pte(page_to_pfn(page), prot);
+}
+
+#define pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) 
+
+static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long addr)
+{
+	return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(addr);
+}
+
+#define pte_offset_map(dir, addr)	pte_offset_kernel((dir), (addr))
+#define pte_unmap(pte)			((void)(pte))
+
+/*
+ * Certain architectures need to do special things when PTEs within
+ * a page table are directly modified.  Thus, the following hook is
+ * made available.
+ */
+static inline void set_pte(pte_t *ptep, pte_t pteval)
+{
+	*ptep = pteval;
+}
+
+static inline void set_pte_at(struct mm_struct *mm,
+	unsigned long addr, pte_t *ptep, pte_t pteval)
+{
+	set_pte(ptep, pteval);
+}
+
+static inline void pte_clear(struct mm_struct *mm,
+	unsigned long addr, pte_t *ptep)
+{
+	set_pte_at(mm, addr, ptep, __pte(0));
+}
+
+static inline int pte_present(pte_t pte)
+{
+	return (pte_val(pte) & _PAGE_PRESENT);
+}
+
+static inline int pte_none(pte_t pte)
+{
+	return (pte_val(pte) == 0);
+}
+
+/* static inline int pte_read(pte_t pte) */
+
+static inline int pte_write(pte_t pte)
+{
+	return pte_val(pte) & _PAGE_WRITE;
+}
+
+static inline int pte_huge(pte_t pte)
+{
+	return pte_present(pte)
+		&& (pte_val(pte) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
+}
+
+/* static inline int pte_exec(pte_t pte) */
+
+static inline int pte_dirty(pte_t pte)
+{
+	return pte_val(pte) & _PAGE_DIRTY;
+}
+
+static inline int pte_young(pte_t pte)
+{
+	return pte_val(pte) & _PAGE_ACCESSED;
+}
+
+static inline int pte_special(pte_t pte)
+{
+	return pte_val(pte) & _PAGE_SPECIAL;
+}
+
+/* static inline pte_t pte_rdprotect(pte_t pte) */
+
+static inline pte_t pte_wrprotect(pte_t pte)
+{
+	return __pte(pte_val(pte) & ~(_PAGE_WRITE));
+}
+
+/* static inline pte_t pte_mkread(pte_t pte) */
+
+static inline pte_t pte_mkwrite(pte_t pte)
+{
+	return __pte(pte_val(pte) | _PAGE_WRITE);
+}
+
+/* static inline pte_t pte_mkexec(pte_t pte) */
+
+static inline pte_t pte_mkdirty(pte_t pte)
+{
+	return __pte(pte_val(pte) | _PAGE_DIRTY);
+}
+
+static inline pte_t pte_mkclean(pte_t pte)
+{
+	return __pte(pte_val(pte) & ~(_PAGE_DIRTY));
+}
+
+static inline pte_t pte_mkyoung(pte_t pte)
+{
+	return __pte(pte_val(pte) & ~(_PAGE_ACCESSED));
+}
+
+static inline pte_t pte_mkold(pte_t pte)
+{
+	return __pte(pte_val(pte) | _PAGE_ACCESSED);
+}
+
+static inline pte_t pte_mkspecial(pte_t pte)
+{
+	return __pte(pte_val(pte) | _PAGE_SPECIAL);
+}
+
+/* Modify page protection bits */
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+	return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
+}
+
+#define pgd_ERROR(e) \
+	pr_err("%s:%d: bad pgd " PTE_FMT ".\n", __FILE__, __LINE__, pgd_val(e))
+
+
+/* Commit new configuration to MMU hardware */
+static inline void update_mmu_cache(struct vm_area_struct *vma,
+	unsigned long address, pte_t *ptep)
+{
+}
+
+/*
+ * Encode and decode a swap entry
+ *
+ * Format of swap PTE:
+ *	bit            0:	_PAGE_PRESENT (zero)
+ *	bit            1:	reserved for future use (zero)
+ *	bits      2 to 6:	swap type
+ *	bits 7 to XLEN-1:	swap offset
+ */
+#define __SWP_TYPE_SHIFT	2
+#define __SWP_TYPE_BITS		5
+#define __SWP_TYPE_MASK		((1UL << __SWP_TYPE_BITS) - 1)
+#define __SWP_OFFSET_SHIFT	(__SWP_TYPE_BITS + __SWP_TYPE_SHIFT)
+
+#define MAX_SWAPFILES_CHECK()	\
+	BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > __SWP_TYPE_BITS)
+
+#define __swp_type(x)		(((x).val >> __SWP_TYPE_SHIFT) & __SWP_TYPE_MASK)
+#define __swp_offset(x)		((x).val >> __SWP_OFFSET_SHIFT)
+#define __swp_entry(type, offset) ((swp_entry_t) \
+	{ ((type) << __SWP_TYPE_SHIFT) | ((offset) << __SWP_OFFSET_SHIFT) })
+
+#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
+#define __swp_entry_to_pte(x)	((pte_t) { (x).val })
+
+#ifdef CONFIG_FLATMEM
+#define kern_addr_valid(addr)   (1) /* FIXME */
+#endif
+
+extern void paging_init(void);
+
+static inline void pgtable_cache_init(void)
+{
+	/* No page table caches to initialize */
+}
+
+#endif /* CONFIG_MMU */
+
+#define VMALLOC_SIZE     _AC(0x8000000,UL)
+#define VMALLOC_END      (PAGE_OFFSET - 1)
+#define VMALLOC_START    (PAGE_OFFSET - VMALLOC_SIZE)
+
+/* Task size is 0x40000000000 for RV64 or 0xb800000 for RV32.
+   Note that PGDIR_SIZE must evenly divide TASK_SIZE. */
+#ifdef CONFIG_64BIT
+#define TASK_SIZE (PGDIR_SIZE * PTRS_PER_PGD / 2)
+#else
+#define TASK_SIZE VMALLOC_START
+#endif
+
+#include <asm-generic/pgtable.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_RISCV_PGTABLE_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/processor.h linux-4.6.2.riscv/arch/riscv/include/asm/processor.h
--- linux-4.6.2/arch/riscv/include/asm/processor.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/processor.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,87 @@
+#ifndef _ASM_RISCV_PROCESSOR_H
+#define _ASM_RISCV_PROCESSOR_H
+
+#include <linux/const.h>
+
+#include <asm/ptrace.h>
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE	PAGE_ALIGN(TASK_SIZE >> 1)
+
+#ifdef __KERNEL__
+#define STACK_TOP		TASK_SIZE
+#define STACK_TOP_MAX		STACK_TOP
+#endif /* __KERNEL__ */
+
+#ifndef __ASSEMBLY__
+
+struct task_struct;
+struct pt_regs;
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr()	({ __label__ _l; _l: &&_l;})
+
+/* CPU-specific state of a task */
+struct thread_struct {
+	/* Callee-saved registers */
+	unsigned long ra;
+	unsigned long sp;	/* Kernel mode stack */
+	unsigned long s[12];	/* s[0]: frame pointer */
+	struct user_fpregs_struct fstate;
+};
+
+#define INIT_THREAD {					\
+	.sp = sizeof(init_stack) + (long)&init_stack,	\
+}
+
+/* Return saved (kernel) PC of a blocked thread. */
+#define thread_saved_pc(t)	((t)->thread.ra)
+#define thread_saved_sp(t)	((t)->thread.sp)
+#define thread_saved_fp(t)	((t)->thread.s[0])
+
+#define task_pt_regs(tsk) \
+	((struct pt_regs *)(task_stack_page(tsk) + THREAD_SIZE) - 1)
+
+#define KSTK_EIP(tsk)		(task_pt_regs(tsk)->sepc)
+#define KSTK_ESP(tsk)		(task_pt_regs(tsk)->sp)
+
+
+/* Do necessary setup to start up a newly executed thread. */
+extern void start_thread(struct pt_regs *regs,
+			unsigned long pc, unsigned long sp);
+
+/* Free all resources held by a thread. */
+static inline void release_thread(struct task_struct *dead_task)
+{
+}
+
+/* Free current thread data structures, etc. */
+static inline void exit_thread(void)
+{
+}
+
+extern unsigned long get_wchan(struct task_struct *p);
+
+
+static inline void cpu_relax(void)
+{
+	int dummy;
+	/* In lieu of a halt instruction, induce a long-latency stall. */
+	__asm__ __volatile__ ("div %0, %0, zero" : "=r" (dummy));
+	barrier();
+}
+
+static inline void wait_for_interrupt(void)
+{
+	__asm__ __volatile__ ("wfi");
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_RISCV_PROCESSOR_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/ptrace.h linux-4.6.2.riscv/arch/riscv/include/asm/ptrace.h
--- linux-4.6.2/arch/riscv/include/asm/ptrace.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/ptrace.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,103 @@
+#ifndef _ASM_RISCV_PTRACE_H
+#define _ASM_RISCV_PTRACE_H
+
+#include <uapi/asm/ptrace.h>
+#include <asm/csr.h>
+
+#ifndef __ASSEMBLY__
+
+struct pt_regs {
+	unsigned long sepc;
+	unsigned long ra;
+	unsigned long sp;
+	unsigned long gp;
+	unsigned long tp;
+	unsigned long t0;
+	unsigned long t1;
+	unsigned long t2;
+	unsigned long s0;
+	unsigned long s1;
+	unsigned long a0;
+	unsigned long a1;
+	unsigned long a2;
+	unsigned long a3;
+	unsigned long a4;
+	unsigned long a5;
+	unsigned long a6;
+	unsigned long a7;
+	unsigned long s2;
+	unsigned long s3;
+	unsigned long s4;
+	unsigned long s5;
+	unsigned long s6;
+	unsigned long s7;
+	unsigned long s8;
+	unsigned long s9;
+	unsigned long s10;
+	unsigned long s11;
+	unsigned long t3;
+	unsigned long t4;
+	unsigned long t5;
+	unsigned long t6;
+	/* Supervisor CSRs */
+	unsigned long sstatus;
+	unsigned long sbadaddr;
+	unsigned long scause;
+};
+
+#ifdef CONFIG_64BIT
+#define REG_FMT "%016lx"
+#else
+#define REG_FMT "%08lx"
+#endif
+
+#define user_mode(regs) (((regs)->sstatus & SR_PS) == 0)
+
+
+/* Helpers for working with the instruction pointer */
+#define GET_IP(regs) ((regs)->sepc)
+#define SET_IP(regs, val) (GET_IP(regs) = (val))
+
+static inline unsigned long instruction_pointer(struct pt_regs *regs)
+{
+	return GET_IP(regs);
+}
+static inline void instruction_pointer_set(struct pt_regs *regs,
+                                           unsigned long val)
+{
+	SET_IP(regs, val);
+}
+
+#define profile_pc(regs) instruction_pointer(regs)
+
+/* Helpers for working with the user stack pointer */
+#define GET_USP(regs) ((regs)->sp)
+#define SET_USP(regs, val) (GET_USP(regs) = (val))
+
+static inline unsigned long user_stack_pointer(struct pt_regs *regs)
+{
+	return GET_USP(regs);
+}
+static inline void user_stack_pointer_set(struct pt_regs *regs,
+                                          unsigned long val)
+{
+	SET_USP(regs, val);
+}
+
+/* Helpers for working with the frame pointer */
+#define GET_FP(regs) ((regs)->s0)
+#define SET_FP(regs, val) (GET_FP(regs) = (val))
+
+static inline unsigned long frame_pointer(struct pt_regs *regs)
+{
+	return GET_FP(regs);
+}
+static inline void frame_pointer_set(struct pt_regs *regs,
+                                     unsigned long val)
+{
+	SET_FP(regs, val);
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_RISCV_PTRACE_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/sbi-con.h linux-4.6.2.riscv/arch/riscv/include/asm/sbi-con.h
--- linux-4.6.2/arch/riscv/include/asm/sbi-con.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/sbi-con.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,8 @@
+#ifndef _ASM_RISCV_SBI_CON_H
+#define _ASM_RISCV_SBI_CON_H
+
+#include <linux/irqreturn.h>
+
+irqreturn_t sbi_console_isr(void);
+
+#endif /* _ASM_RISCV_SBI_CON_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/sbi.h linux-4.6.2.riscv/arch/riscv/include/asm/sbi.h
--- linux-4.6.2/arch/riscv/include/asm/sbi.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/sbi.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,30 @@
+#ifndef _ASM_RISCV_SBI_H
+#define _ASM_RISCV_SBI_H
+
+typedef struct {
+  unsigned long base;
+  unsigned long size;
+  unsigned long node_id;
+} memory_block_info;
+
+unsigned long sbi_query_memory(unsigned long id, memory_block_info *p);
+
+unsigned long sbi_hart_id(void);
+unsigned long sbi_num_harts(void);
+unsigned long sbi_timebase(void);
+void sbi_set_timer(unsigned long long stime_value);
+void sbi_send_ipi(unsigned long hart_id);
+unsigned long sbi_clear_ipi(void);
+void sbi_shutdown(void);
+
+void sbi_console_putchar(unsigned char ch);
+int sbi_console_getchar(void);
+
+void sbi_remote_sfence_vm(unsigned long hart_mask_ptr, unsigned long asid);
+void sbi_remote_sfence_vm_range(unsigned long hart_mask_ptr, unsigned long asid, unsigned long start, unsigned long size);
+void sbi_remote_fence_i(unsigned long hart_mask_ptr);
+
+unsigned long sbi_mask_interrupt(unsigned long which);
+unsigned long sbi_unmask_interrupt(unsigned long which);
+
+#endif
diff -Nur linux-4.6.2/arch/riscv/include/asm/serial.h linux-4.6.2.riscv/arch/riscv/include/asm/serial.h
--- linux-4.6.2/arch/riscv/include/asm/serial.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/serial.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,29 @@
+#ifndef _ASM_RISCV_SERIAL_H
+#define _ASM_RISCV_SERIAL_H
+
+/*
+ * FIXME: interim serial support for riscv-qemu
+ *
+ * Currently requires that the emulator itself create a hole at addresses
+ * 0x3f8 - 0x3ff without looking through page tables.
+ *
+ * This assumes you have a 1.8432 MHz clock for your UART.
+ */
+#define BASE_BAUD ( 1843200 / 16 )
+
+/* Standard COM flags */
+#ifdef CONFIG_SERIAL_DETECT_IRQ
+#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ)
+#else
+#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
+#endif
+
+#define SERIAL_PORT_DFNS 			\
+	{	/* ttyS0 */			\
+		.baud_base = BASE_BAUD,		\
+		.port      = 0x3F8,		\
+		.irq       = 4,			\
+		.flags     = STD_COM_FLAGS,	\
+	},
+
+#endif /* _ASM_RISCV_SERIAL_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/setup.h linux-4.6.2.riscv/arch/riscv/include/asm/setup.h
--- linux-4.6.2/arch/riscv/include/asm/setup.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/setup.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,6 @@
+#ifndef _ASM_RISCV_SETUP_H
+#define _ASM_RISCV_SETUP_H
+
+#include <asm-generic/setup.h>
+
+#endif /* _ASM_RISCV_SETUP_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/smp.h linux-4.6.2.riscv/arch/riscv/include/asm/smp.h
--- linux-4.6.2/arch/riscv/include/asm/smp.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/smp.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,28 @@
+#ifndef _ASM_RISCV_SMP_H
+#define _ASM_RISCV_SMP_H
+
+#include <linux/cpumask.h>
+#include <linux/irqreturn.h>
+
+#ifdef CONFIG_SMP
+
+/* SMP initialization hook for setup_arch */
+void __init init_clockevent(void);
+
+/* SMP initialization hook for setup_arch */
+void __init setup_smp(void);
+
+/* Hook for the generic smp_call_function_many() routine. */
+void arch_send_call_function_ipi_mask(struct cpumask *mask);
+
+/* Hook for the generic smp_call_function_single() routine. */
+void arch_send_call_function_single_ipi(int cpu);
+
+#define raw_smp_processor_id() (current_thread_info()->cpu)
+
+/* Interprocessor interrupt handler */
+irqreturn_t handle_ipi(void);
+
+#endif /* CONFIG_SMP */
+
+#endif /* _ASM_RISCV_SMP_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/spinlock.h linux-4.6.2.riscv/arch/riscv/include/asm/spinlock.h
--- linux-4.6.2/arch/riscv/include/asm/spinlock.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/spinlock.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,142 @@
+#ifndef _ASM_RISCV_SPINLOCK_H
+#define _ASM_RISCV_SPINLOCK_H
+
+#include <linux/kernel.h>
+#include <asm/current.h>
+
+/*
+ * Simple spin lock operations.  These provide no fairness guarantees.
+ */
+
+#define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock)
+#define arch_spin_is_locked(x)	((x)->lock != 0)
+#define arch_spin_unlock_wait(x) \
+		do { cpu_relax(); } while ((x)->lock)
+
+static inline void arch_spin_unlock(arch_spinlock_t *lock)
+{
+	__asm__ __volatile__ (
+		"amoswap.w.rl x0, x0, %0"
+		: "=A" (lock->lock)
+		:: "memory");
+}
+
+static inline int arch_spin_trylock(arch_spinlock_t *lock)
+{
+	int tmp = 1, busy;
+
+	__asm__ __volatile__ (
+		"amoswap.w.aq %0, %2, %1"
+		: "=r" (busy), "+A" (lock->lock)
+		: "r" (tmp)
+		: "memory");
+
+	return !busy;
+}
+
+static inline void arch_spin_lock(arch_spinlock_t *lock)
+{
+	while (1) {
+		if (arch_spin_is_locked(lock))
+			continue;
+
+		if (arch_spin_trylock(lock))
+			break;
+	}
+}
+
+/***********************************************************/
+
+static inline int arch_read_can_lock(arch_rwlock_t *lock)
+{
+	return lock->lock >= 0;
+}
+
+static inline int arch_write_can_lock(arch_rwlock_t *lock)
+{
+	return lock->lock == 0;
+}
+
+static inline void arch_read_lock(arch_rwlock_t *lock)
+{
+	int tmp;
+
+	__asm__ __volatile__(
+		"1:	lr.w	%1, %0\n"
+		"	bltz	%1, 1b\n"
+		"	addi	%1, %1, 1\n"
+		"	sc.w.aq	%1, %1, %0\n"
+		"	bnez	%1, 1b\n"
+		: "+A" (lock->lock), "=&r" (tmp)
+		:: "memory");
+}
+
+static inline void arch_write_lock(arch_rwlock_t *lock)
+{
+	int tmp;
+
+	__asm__ __volatile__(
+		"1:	lr.w	%1, %0\n"
+		"	bnez	%1, 1b\n"
+		"	li	%1, -1\n"
+		"	sc.w.aq	%1, %1, %0\n"
+		"	bnez	%1, 1b\n"
+		: "+A" (lock->lock), "=&r" (tmp)
+		:: "memory");
+}
+
+static inline int arch_read_trylock(arch_rwlock_t * lock)
+{
+	int busy;
+
+	__asm__ __volatile__(
+		"1:	lr.w	%1, %0\n"
+		"	bltz	%1, 1f\n"
+		"	addi	%1, %1, 1\n"
+		"	sc.w.aq	%1, %1, %0\n"
+		"	bnez	%1, 1b\n"
+		"1:\n"
+		: "+A" (lock->lock), "=&r" (busy)
+		:: "memory");
+	
+	return !busy;
+}
+
+static inline int arch_write_trylock(arch_rwlock_t * lock)
+{
+	int busy;
+
+	__asm__ __volatile__(
+		"1:	lr.w	%1, %0\n"
+		"	bnez	%1, 1f\n"
+		"	li	%1, -1\n"
+		"	sc.w.aq	%1, %1, %0\n"
+		"	bnez	%1, 1b\n"
+		"1:\n"
+		: "+A" (lock->lock), "=&r" (busy)
+		:: "memory");
+	
+	return !busy;
+}
+
+static inline void arch_read_unlock(arch_rwlock_t * lock)
+{
+	__asm__ __volatile__(
+		"amoadd.w.rl x0, %1, %0"
+		: "+A" (lock->lock)
+		: "r" (-1)
+		: "memory");
+}
+
+static inline void arch_write_unlock(arch_rwlock_t * lock)
+{
+	__asm__ __volatile__ (
+		"amoswap.w.rl x0, x0, %0"
+		: "=A" (lock->lock)
+		:: "memory");
+}
+
+#define arch_read_lock_flags(lock, flags) arch_read_lock(lock)
+#define arch_write_lock_flags(lock, flags) arch_write_lock(lock)
+
+#endif /* _ASM_RISCV_SPINLOCK_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/spinlock_types.h linux-4.6.2.riscv/arch/riscv/include/asm/spinlock_types.h
--- linux-4.6.2/arch/riscv/include/asm/spinlock_types.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/spinlock_types.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,20 @@
+#ifndef _ASM_RISCV_SPINLOCK_TYPES_H
+#define _ASM_RISCV_SPINLOCK_TYPES_H
+
+#ifndef __LINUX_SPINLOCK_TYPES_H
+# error "please don't include this file directly"
+#endif
+
+typedef struct {
+	volatile unsigned int lock;
+} arch_spinlock_t;
+
+#define __ARCH_SPIN_LOCK_UNLOCKED	{ 0 }
+
+typedef struct {
+	volatile unsigned int lock;
+} arch_rwlock_t;
+
+#define __ARCH_RW_LOCK_UNLOCKED		{ 0 }
+
+#endif
diff -Nur linux-4.6.2/arch/riscv/include/asm/string.h linux-4.6.2.riscv/arch/riscv/include/asm/string.h
--- linux-4.6.2/arch/riscv/include/asm/string.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/string.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,17 @@
+#ifndef _ASM_RISCV_STRING_H
+#define _ASM_RISCV_STRING_H
+
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <linux/linkage.h>
+
+#define __HAVE_ARCH_MEMSET
+extern asmlinkage void *memset(void *, int, size_t);
+
+#define __HAVE_ARCH_MEMCPY
+extern asmlinkage void *memcpy(void *, const void *, size_t);
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_RISCV_STRING_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/switch_to.h linux-4.6.2.riscv/arch/riscv/include/asm/switch_to.h
--- linux-4.6.2/arch/riscv/include/asm/switch_to.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/switch_to.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,57 @@
+#ifndef _ASM_RISCV_SWITCH_TO_H
+#define _ASM_RISCV_SWITCH_TO_H
+
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+#include <asm/csr.h>
+
+extern void __fstate_save(struct task_struct *);
+extern void __fstate_restore(struct task_struct *);
+
+static inline void __fstate_clean(struct pt_regs *regs)
+{
+	regs->sstatus |= (regs->sstatus & ~(SR_FS)) | SR_FS_CLEAN;
+}
+
+static inline void fstate_save(struct task_struct *task,
+                               struct pt_regs *regs)
+{
+	if ((regs->sstatus & SR_FS) == SR_FS_DIRTY) {
+		__fstate_save(task);
+		__fstate_clean(regs);
+	}
+}
+
+static inline void fstate_restore(struct task_struct *task,
+                                  struct pt_regs *regs)
+{
+	if ((regs->sstatus & SR_FS) != SR_FS_OFF) {
+		__fstate_restore(task);
+		__fstate_clean(regs);
+	}
+}
+
+static inline void __switch_to_aux(struct task_struct *prev,
+                                   struct task_struct *next)
+{
+	struct pt_regs *regs;
+
+	regs = task_pt_regs(prev);
+	if (unlikely(regs->sstatus & SR_SD)) {
+		fstate_save(prev, regs);
+	}
+	fstate_restore(next, task_pt_regs(next));
+}
+
+extern struct task_struct *__switch_to(struct task_struct *,
+                                       struct task_struct *);
+
+#define switch_to(prev, next, last)			\
+do {							\
+	struct task_struct *__prev = (prev);		\
+	struct task_struct *__next = (next);		\
+	__switch_to_aux(__prev, __next);		\
+	((last) = __switch_to(__prev, __next));		\
+} while (0)
+
+#endif /* _ASM_RISCV_SWITCH_TO_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/syscall.h linux-4.6.2.riscv/arch/riscv/include/asm/syscall.h
--- linux-4.6.2/arch/riscv/include/asm/syscall.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/syscall.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2008-2009 Red Hat, Inc.  All rights reserved.
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ * Copyright 2015 Regents of the University of California, Berkeley
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ *
+ * See asm-generic/syscall.h for descriptions of what we must do here.
+ */
+
+#ifndef _ASM_RISCV_SYSCALL_H
+#define _ASM_RISCV_SYSCALL_H
+
+#include <linux/sched.h>
+#include <linux/err.h>
+
+/* The array of function pointers for syscalls. */
+extern void *sys_call_table[];
+
+/*
+ * Only the low 32 bits of orig_r0 are meaningful, so we return int.
+ * This importantly ignores the high bits on 64-bit, so comparisons
+ * sign-extend the low 32 bits.
+ */
+static inline int syscall_get_nr(struct task_struct *task,
+				 struct pt_regs *regs)
+{
+	return regs->a7;
+}
+
+static inline void syscall_set_nr(struct task_struct *task,
+				  struct pt_regs *regs,
+				  int sysno)
+{
+	regs->a7 = sysno;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+				    struct pt_regs *regs)
+{
+	/* FIXME: We can't do this... */
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	unsigned long error = regs->a0;
+	return IS_ERR_VALUE(error) ? error : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+					    struct pt_regs *regs)
+{
+	return regs->a0;
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+					    struct pt_regs *regs,
+					    int error, long val)
+{
+	regs->a0 = (long) error ?: val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned int i, unsigned int n,
+					 unsigned long *args)
+{
+	BUG_ON(i + n > 6);
+	memcpy(args, &regs->a0 + i * sizeof(regs->a0), n * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned int i, unsigned int n,
+					 const unsigned long *args)
+{
+	BUG_ON(i + n > 6);
+	memcpy(&regs->a0 + i * sizeof(regs->a0), args, n * sizeof(regs->a0));
+}
+
+#endif	/* _ASM_TILE_SYSCALL_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/syscalls.h linux-4.6.2.riscv/arch/riscv/include/asm/syscalls.h
--- linux-4.6.2/arch/riscv/include/asm/syscalls.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/syscalls.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,12 @@
+#ifndef _ASM_RISCV_SYSCALLS_H
+#define _ASM_RISCV_SYSCALLS_H
+
+#include <linux/linkage.h>
+
+#include <asm-generic/syscalls.h>
+
+/* kernel/sys_riscv.c */
+asmlinkage long sys_sysriscv(unsigned long, unsigned long,
+	unsigned long, unsigned long);
+
+#endif /* _ASM_RISCV_SYSCALLS_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/thread_info.h linux-4.6.2.riscv/arch/riscv/include/asm/thread_info.h
--- linux-4.6.2/arch/riscv/include/asm/thread_info.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/thread_info.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,89 @@
+#ifndef _ASM_RISCV_THREAD_INFO_H
+#define _ASM_RISCV_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#include <asm/page.h>
+#include <linux/const.h>
+
+/* thread information allocation */
+#define THREAD_SIZE_ORDER 	(1)
+#define THREAD_SIZE 		(PAGE_SIZE << THREAD_SIZE_ORDER)
+
+#ifndef __ASSEMBLY__
+
+#include <asm/processor.h>
+#include <asm/csr.h>
+
+typedef unsigned long mm_segment_t;
+
+/*
+ * low level task data that entry.S needs immediate access to
+ * - this struct should fit entirely inside of one cache line
+ * - this struct resides at the bottom of the supervisor stack
+ * - if the members of this struct changes, the assembly constants
+ *   in asm-offsets.c must be updated accordingly
+ */
+struct thread_info {
+	struct task_struct	*task;		/* main task structure */
+	unsigned long		flags;		/* low level flags */
+	__u32			cpu;		/* current CPU */
+	int                     preempt_count;  /* 0 => preemptable, <0 => BUG */
+	mm_segment_t		addr_limit;
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#define INIT_THREAD_INFO(tsk)			\
+{						\
+	.task		= &tsk,			\
+	.flags		= 0,			\
+	.cpu		= 0,			\
+	.preempt_count	= INIT_PREEMPT_COUNT,	\
+	.addr_limit	= KERNEL_DS,		\
+}
+
+#define init_thread_info	(init_thread_union.thread_info)
+#define init_stack		(init_thread_union.stack)
+
+/*
+ * Pointer to the thread_info struct of the current process
+ * Assumes that the kernel mode stack (thread_union) is THREAD_SIZE-aligned
+ */
+static inline struct thread_info *current_thread_info(void)
+{
+	register unsigned long sp __asm__ ("sp");
+	return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
+}
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * thread information flags
+ * - these are process state flags that various assembly files may need to
+ *   access
+ * - pending work-to-be-done flags are in lowest half-word
+ * - other flags in upper half-word(s)
+ */
+#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
+#define TIF_NOTIFY_RESUME	1	/* callback before returning to user */
+#define TIF_SIGPENDING		2	/* signal pending */
+#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
+#define TIF_RESTORE_SIGMASK	4	/* restore signal mask in do_signal() */
+#define TIF_MEMDIE		5	/* is terminating due to OOM killer */
+#define TIF_SYSCALL_TRACEPOINT  6       /* syscall tracepoint instrumentation */
+
+#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
+
+#define _TIF_WORK_MASK \
+	(_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | _TIF_NEED_RESCHED)
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_RISCV_THREAD_INFO_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/timex.h linux-4.6.2.riscv/arch/riscv/include/asm/timex.h
--- linux-4.6.2/arch/riscv/include/asm/timex.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/timex.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,39 @@
+#ifndef _ASM_RISCV_TIMEX_H
+#define _ASM_RISCV_TIMEX_H
+
+#include <asm/param.h>
+
+#define CLOCK_TICK_RATE (HZ * 100UL)
+
+typedef unsigned long cycles_t;
+
+static inline cycles_t get_cycles(void)
+{
+#if __riscv_xlen >= 64
+	cycles_t n;
+	__asm__ __volatile__ (
+		"rdtime %0"
+		: "=r" (n));
+	return n;
+#else
+	u32 lo, hi, tmp;
+	__asm__ __volatile__ (
+		"1:\n"
+		"rdtimeh %0\n"
+		"rdtime %1\n"
+		"rdtimeh %2\n"
+		"bne %0, %2, 1b"
+		: "=&r" (hi), "=&r" (lo), "=&r" (tmp));
+	return ((u64)hi << 32) | lo;
+#endif
+}
+
+#define ARCH_HAS_READ_CURRENT_TIMER
+
+static inline int read_current_timer(unsigned long *timer_val)
+{
+	*timer_val = get_cycles();
+	return 0;
+}
+
+#endif /* _ASM_RISCV_TIMEX_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/tlbflush.h linux-4.6.2.riscv/arch/riscv/include/asm/tlbflush.h
--- linux-4.6.2/arch/riscv/include/asm/tlbflush.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/tlbflush.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,84 @@
+#ifndef _ASM_RISCV_TLBFLUSH_H
+#define _ASM_RISCV_TLBFLUSH_H
+
+#ifdef CONFIG_MMU
+
+#include <linux/mm.h>
+#include <linux/bug.h>
+#include <asm/csr.h>
+
+/* Flush entire local TLB */
+static inline void local_flush_tlb_all(void)
+{
+	__asm__ __volatile__ ("sfence.vm");
+}
+
+/* Flush one page from local TLB */
+static inline void local_flush_tlb_page(unsigned long addr)
+{
+	__asm__ __volatile__ ("sfence.vm %0" : : "r" (addr));
+}
+
+#ifndef CONFIG_SMP
+
+#define flush_tlb_all() local_flush_tlb_all()
+#define flush_tlb_page(vma, addr) local_flush_tlb_page(addr)
+#define flush_tlb_range(vma, start, end) local_flush_tlb_all()
+
+#else /* CONFIG_SMP */
+
+#include <asm/sbi.h>
+
+#define flush_tlb_all() sbi_remote_sfence_vm(0, 0)
+#define flush_tlb_page(vma, addr) flush_tlb_range(vma, (addr), (addr) + 1)
+#define flush_tlb_range(vma, start, end) \
+	sbi_remote_sfence_vm_range(0, 0, (start), (end) - (start))
+
+#endif /* CONFIG_SMP */
+
+/* Flush the TLB entries of the specified mm context */
+static inline void flush_tlb_mm(struct mm_struct *mm)
+{
+	flush_tlb_all();
+}
+
+/* Flush a range of kernel pages */
+static inline void flush_tlb_kernel_range(unsigned long start,
+	unsigned long end)
+{
+	flush_tlb_all();
+}
+
+#else /* !CONFIG_MMU */
+
+static inline void flush_tlb_all(void)
+{
+	BUG();
+}
+
+static inline void flush_tlb_mm(struct mm_struct *mm)
+{
+	BUG();
+}
+
+static inline void flush_tlb_page(struct vm_area_struct *vma,
+	unsigned long addr)
+{
+	BUG();
+}
+
+static inline void flush_tlb_range(struct vm_area_struct *vma,
+	unsigned long start, unsigned long end)
+{
+	BUG();
+}
+
+static inline void flush_tlb_kernel_range(unsigned long start,
+	unsigned long end)
+{
+	BUG();
+}
+
+#endif /* CONFIG_MMU */
+
+#endif /* _ASM_RISCV_TLBFLUSH_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/tlb.h linux-4.6.2.riscv/arch/riscv/include/asm/tlb.h
--- linux-4.6.2/arch/riscv/include/asm/tlb.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/tlb.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,11 @@
+#ifndef _ASM_RISCV_TLB_H
+#define _ASM_RISCV_TLB_H
+
+#include <asm-generic/tlb.h>
+
+static inline void tlb_flush(struct mmu_gather *tlb)
+{
+	flush_tlb_mm(tlb->mm);
+}
+
+#endif /* _ASM_RISCV_TLB_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/uaccess.h linux-4.6.2.riscv/arch/riscv/include/asm/uaccess.h
--- linux-4.6.2/arch/riscv/include/asm/uaccess.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/uaccess.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,460 @@
+#ifndef _ASM_RISCV_UACCESS_H
+#define _ASM_RISCV_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/errno.h>
+#include <linux/compiler.h>
+#include <linux/thread_info.h>
+#include <asm/byteorder.h>
+#include <asm/asm.h>
+
+#ifdef CONFIG_RV_PUM
+#define __enable_user_access()						\
+	__asm__ __volatile__ ("csrc sstatus, %0" : : "r" (SR_PUM))
+#define __disable_user_access()						\
+	__asm__ __volatile__ ("csrs sstatus, %0" : : "r" (SR_PUM))
+#else
+#define __enable_user_access()
+#define __disable_user_access()
+#endif
+
+/*
+ * The fs value determines whether argument validity checking should be
+ * performed or not.  If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ */
+
+#define KERNEL_DS	(~0UL)
+#define USER_DS		(TASK_SIZE)
+
+#define get_ds()	(KERNEL_DS)
+#define get_fs()	(current_thread_info()->addr_limit)
+
+static inline void set_fs(mm_segment_t fs)
+{
+	current_thread_info()->addr_limit = fs;
+}
+
+#define segment_eq(a, b) ((a) == (b))
+
+#define user_addr_max()	(get_fs())
+
+
+#define VERIFY_READ	0
+#define VERIFY_WRITE	1
+
+/**
+ * access_ok: - Checks if a user space pointer is valid
+ * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE.  Note that
+ *        %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe
+ *        to write to a block, it is always safe to read from it.
+ * @addr: User space pointer to start of block to check
+ * @size: Size of block to check
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * Checks if a pointer to a block of memory in user space is valid.
+ *
+ * Returns true (nonzero) if the memory block may be valid, false (zero)
+ * if it is definitely invalid.
+ *
+ * Note that, depending on architecture, this function probably just
+ * checks that the pointer is in the user space range - after calling
+ * this function, memory access functions may still return -EFAULT.
+ */
+#define access_ok(type, addr, size) ({					\
+	__chk_user_ptr(addr);						\
+	likely(__access_ok((unsigned long __force)(addr), (size)));	\
+})
+
+/* Ensure that the range [addr, addr+size) is within the process's
+ * address space
+ */
+static inline int __access_ok(unsigned long addr, unsigned long size)
+{
+	const mm_segment_t fs = get_fs();
+	return (size <= fs) && (addr <= (fs - size));
+}
+
+/*
+ * The exception table consists of pairs of addresses: the first is the
+ * address of an instruction that is allowed to fault, and the second is
+ * the address at which the program should continue.  No registers are
+ * modified, so it is entirely up to the continuation code to figure out
+ * what to do.
+ *
+ * All the routines below use bits of fixup code that are out of line
+ * with the main instruction path.  This means when everything is well,
+ * we don't even have to jump over them.  Further, they do not intrude
+ * on our cache or tlb entries.
+ */
+
+struct exception_table_entry {
+	unsigned long insn, fixup;
+};
+
+extern int fixup_exception(struct pt_regs *);
+
+#if defined(__LITTLE_ENDIAN)
+#define __MSW	1
+#define __LSW	0
+#elif defined(__BIG_ENDIAN)
+#define __MSW	0
+#define	__LSW	1
+#else
+#error "Unknown endianness"
+#endif
+
+/*
+ * The "__xxx" versions of the user access functions do not verify the address
+ * space - it must have been done previously with a separate "access_ok()"
+ * call.
+ */
+
+#ifdef CONFIG_MMU
+#define __get_user_asm(insn, x, ptr, err)			\
+do {								\
+	uintptr_t __tmp;					\
+	__enable_user_access();					\
+	__asm__ __volatile__ (					\
+		"1:\n"						\
+		"	" insn " %1, %3\n"			\
+		"2:\n"						\
+		"	.section .fixup,\"ax\"\n"		\
+		"	.balign 4\n"				\
+		"3:\n"						\
+		"	li %0, %4\n"				\
+		"	li %1, 0\n"				\
+		"	jump 2b, %2\n"				\
+		"	.previous\n"				\
+		"	.section __ex_table,\"a\"\n"		\
+		"	.balign " SZPTR "\n"			\
+		"	" PTR " 1b, 3b\n"			\
+		"	.previous"				\
+		: "+r" (err), "=&r" (x), "=r" (__tmp)		\
+		: "m" (*(ptr)), "i" (-EFAULT));			\
+	__disable_user_access();				\
+} while (0)
+#else /* !CONFIG_MMU */
+#define __get_user_asm(insn, x, ptr, err)			\
+	__asm__ __volatile__ (					\
+		insn " %0, %1"					\
+		: "=r" (x)					\
+		: "m" (*(ptr)))
+#endif /* CONFIG_MMU */
+
+
+#ifdef CONFIG_64BIT
+#define __get_user_8(x, ptr, err) \
+	__get_user_asm("ld", x, ptr, err)
+#else /* !CONFIG_64BIT */
+#ifdef CONFIG_MMU
+#define __get_user_8(x, ptr, err)				\
+do {								\
+	u32 __user *__ptr = (u32 __user *)(ptr);		\
+	u32 __lo, __hi;						\
+	uintptr_t __tmp;					\
+	__enable_user_access();					\
+	__asm__ __volatile__ (					\
+		"1:\n"						\
+		"	lw %1, %4\n"				\
+		"2:\n"						\
+		"	lw %2, %5\n"				\
+		"3:\n"						\
+		"	.section .fixup,\"ax\"\n"		\
+		"	.balign 4\n"				\
+		"4:\n"						\
+		"	li %0, %6\n"				\
+		"	li %1, 0\n"				\
+		"	li %2, 0\n"				\
+		"	jump 3b, %3\n"				\
+		"	.previous\n"				\
+		"	.section __ex_table,\"a\"\n"		\
+		"	.balign " SZPTR "\n"			\
+		"	" PTR " 1b, 4b\n"			\
+		"	" PTR " 2b, 4b\n"			\
+		"	.previous"				\
+		: "+r" (err), "=&r" (__lo), "=r" (__hi),	\
+			"=r" (__tmp)				\
+		: "m" (__ptr[__LSW]), "m" (__ptr[__MSW]),	\
+			"i" (-EFAULT));				\
+	__disable_user_access();				\
+	(x) = (__typeof__(x))((__typeof__((x)-(x)))(		\
+		(((u64)__hi << 32) | __lo)));			\
+} while (0)
+#else /* !CONFIG_MMU */
+#define __get_user_8(x, ptr, err) \
+	(x) = (__typeof__(x))(*((u64 __user *)(ptr)))
+#endif /* CONFIG_MMU */
+#endif /* CONFIG_64BIT */
+
+
+/**
+ * __get_user: - Get a simple variable from user space, with less checking.
+ * @x:   Variable to store result.
+ * @ptr: Source address, in user space.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * This macro copies a single simple variable from user space to kernel
+ * space.  It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and the result of
+ * dereferencing @ptr must be assignable to @x without a cast.
+ *
+ * Caller must check the pointer with access_ok() before calling this
+ * function.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ * On error, the variable @x is set to zero.
+ */
+#define __get_user(x, ptr)					\
+({								\
+	register int __gu_err = 0;				\
+	const __typeof__(*(ptr)) __user *__gu_ptr = (ptr);	\
+	__chk_user_ptr(__gu_ptr);				\
+	switch (sizeof(*__gu_ptr)) {				\
+	case 1:							\
+		__get_user_asm("lb", (x), __gu_ptr, __gu_err);	\
+		break;						\
+	case 2:							\
+		__get_user_asm("lh", (x), __gu_ptr, __gu_err);	\
+		break;						\
+	case 4:							\
+		__get_user_asm("lw", (x), __gu_ptr, __gu_err);	\
+		break;						\
+	case 8:							\
+		__get_user_8((x), __gu_ptr, __gu_err);	\
+		break;						\
+	default:						\
+		BUILD_BUG();					\
+	}							\
+	__gu_err;						\
+})
+
+/**
+ * get_user: - Get a simple variable from user space.
+ * @x:   Variable to store result.
+ * @ptr: Source address, in user space.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * This macro copies a single simple variable from user space to kernel
+ * space.  It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and the result of
+ * dereferencing @ptr must be assignable to @x without a cast.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ * On error, the variable @x is set to zero.
+ */
+#define get_user(x, ptr)					\
+({								\
+	const __typeof__(*(ptr)) __user *__p = (ptr);		\
+	might_fault();						\
+	access_ok(VERIFY_READ, __p, sizeof(*__p)) ?		\
+		__get_user((x), __p) :				\
+		((x) = 0, -EFAULT);				\
+})
+
+
+#ifdef CONFIG_MMU
+#define __put_user_asm(insn, x, ptr, err)			\
+do {								\
+	uintptr_t __tmp;					\
+	__typeof__(*(ptr)) __x = x;				\
+	__enable_user_access();					\
+	__asm__ __volatile__ (					\
+		"1:\n"						\
+		"	" insn " %z3, %2\n"			\
+		"2:\n"						\
+		"	.section .fixup,\"ax\"\n"		\
+		"	.balign 4\n"				\
+		"3:\n"						\
+		"	li %0, %4\n"				\
+		"	jump 2b, %1\n"				\
+		"	.previous\n"				\
+		"	.section __ex_table,\"a\"\n"		\
+		"	.balign " SZPTR "\n"			\
+		"	" PTR " 1b, 3b\n"			\
+		"	.previous"				\
+		: "+r" (err), "=r" (__tmp), "=m" (*(ptr))	\
+		: "rJ" (__x), "i" (-EFAULT));			\
+	__disable_user_access();				\
+} while (0)
+#else /* !CONFIG_MMU */
+#define __put_user_asm(insn, x, ptr, err)			\
+	__asm__ __volatile__ (					\
+		insn " %z1, %0"					\
+		: "=m" (*(ptr))					\
+		: "rJ" ((__typeof__(*(ptr))) x))
+#endif /* CONFIG_MMU */
+
+
+#ifdef CONFIG_64BIT
+#define __put_user_8(x, ptr, err) \
+	__put_user_asm("sd", x, ptr, err)
+#else /* !CONFIG_64BIT */
+#ifdef CONFIG_MMU
+#define __put_user_8(x, ptr, err)				\
+do {								\
+	u32 __user *__ptr = (u32 __user *)(ptr);		\
+	u64 __x = (__typeof__((x)-(x)))(x);	 		\
+	uintptr_t __tmp;					\
+	__enable_user_access();					\
+	__asm__ __volatile__ (					\
+		"1:\n"						\
+		"	sw %z4, %2\n"				\
+		"2:\n"						\
+		"	sw %z5, %3\n"				\
+		"3:\n"						\
+		"	.section .fixup,\"ax\"\n"		\
+		"	.balign 4\n"				\
+		"4:\n"						\
+		"	li %0, %6\n"				\
+		"	jump 2b, %1\n"				\
+		"	.previous\n"				\
+		"	.section __ex_table,\"a\"\n"		\
+		"	.balign " SZPTR "\n"			\
+		"	" PTR " 1b, 4b\n"			\
+		"	" PTR " 2b, 4b\n"			\
+		"	.previous"				\
+		: "+r" (err), "=r" (__tmp),			\
+			"=m" (__ptr[__LSW]),			\
+			"=m" (__ptr[__MSW])			\
+		: "rJ" (__x), "rJ" (__x >> 32), "i" (-EFAULT));	\
+	__disable_user_access();				\
+} while (0)
+#else /* !CONFIG_MMU */
+#define __put_user_8(x, ptr, err)				\
+	*((u64 __user *)(ptr)) = (u64)(x)
+#endif /* CONFIG_MMU */
+#endif /* CONFIG_64BIT */
+
+
+/**
+ * __put_user: - Write a simple value into user space, with less checking.
+ * @x:   Value to copy to user space.
+ * @ptr: Destination address, in user space.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * This macro copies a single simple value from kernel space to user
+ * space.  It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and @x must be assignable
+ * to the result of dereferencing @ptr.
+ *
+ * Caller must check the pointer with access_ok() before calling this
+ * function.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ */
+#define __put_user(x, ptr)					\
+({								\
+	register int __pu_err = 0;				\
+	__typeof__(*(ptr)) __user *__gu_ptr = (ptr);		\
+	__chk_user_ptr(__gu_ptr);				\
+	switch (sizeof(*__gu_ptr)) {				\
+	case 1:							\
+		__put_user_asm("sb", (x), __gu_ptr, __pu_err);	\
+		break;						\
+	case 2:							\
+		__put_user_asm("sh", (x), __gu_ptr, __pu_err);	\
+		break;						\
+	case 4:							\
+		__put_user_asm("sw", (x), __gu_ptr, __pu_err);	\
+		break;						\
+	case 8:							\
+		__put_user_8((x), __gu_ptr, __pu_err);	\
+		break;						\
+	default:						\
+		BUILD_BUG();					\
+	}							\
+	__pu_err;						\
+})
+
+/**
+ * put_user: - Write a simple value into user space.
+ * @x:   Value to copy to user space.
+ * @ptr: Destination address, in user space.
+ *
+ * Context: User context only.  This function may sleep.
+ *
+ * This macro copies a single simple value from kernel space to user
+ * space.  It supports simple types like char and int, but not larger
+ * data types like structures or arrays.
+ *
+ * @ptr must have pointer-to-simple-variable type, and @x must be assignable
+ * to the result of dereferencing @ptr.
+ *
+ * Returns zero on success, or -EFAULT on error.
+ */
+#define put_user(x, ptr)					\
+({								\
+	__typeof__(*(ptr)) __user *__p = (ptr);			\
+	might_fault();						\
+	access_ok(VERIFY_WRITE, __p, sizeof(*__p)) ?		\
+		__put_user((x), __p) :				\
+		-EFAULT;					\
+})
+
+
+extern unsigned long __must_check __copy_user(void __user *to,
+	const void __user *from, unsigned long n);
+
+static inline long __must_check __copy_from_user(void *to,
+		const void __user *from, unsigned long n)
+{
+	return __copy_user(to, from, n);
+}
+
+static inline long __must_check __copy_to_user(void __user *to,
+		const void *from, unsigned long n)
+{
+	return __copy_user(to, from, n);
+}
+
+#define __copy_from_user_inatomic(to, from, n) \
+	__copy_from_user((to), (from), (n))
+#define __copy_to_user_inatomic(to, from, n) \
+	__copy_to_user((to), (from), (n))
+
+static inline long copy_from_user(void *to,
+		const void __user * from, unsigned long n)
+{
+	might_fault();
+	return access_ok(VERIFY_READ, from, n) ?
+		__copy_from_user(to, from, n) : n;
+}
+
+static inline long copy_to_user(void __user *to,
+		const void *from, unsigned long n)
+{
+	might_fault();
+	return access_ok(VERIFY_WRITE, to, n) ?
+		__copy_to_user(to, from, n) : n;
+}
+
+extern long strncpy_from_user(char *dest, const char __user *src, long count);
+
+extern long __must_check strlen_user(const char __user *str);
+extern long __must_check strnlen_user(const char __user *str, long n);
+
+extern unsigned long __must_check __clear_user(void __user *addr, unsigned long n);
+
+static inline unsigned long __must_check clear_user(void __user *to, unsigned long n)
+{
+	might_fault();
+	return access_ok(VERIFY_WRITE, to, n) ?
+		__clear_user(to, n) : n;
+}
+
+#endif /* _ASM_RISCV_UACCESS_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/unistd.h linux-4.6.2.riscv/arch/riscv/include/asm/unistd.h
--- linux-4.6.2/arch/riscv/include/asm/unistd.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/unistd.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,3 @@
+#define __ARCH_HAVE_MMU
+#define __ARCH_WANT_SYS_CLONE
+#include <uapi/asm/unistd.h>
diff -Nur linux-4.6.2/arch/riscv/include/asm/vdso.h linux-4.6.2.riscv/arch/riscv/include/asm/vdso.h
--- linux-4.6.2/arch/riscv/include/asm/vdso.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/vdso.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,15 @@
+#ifndef _ASM_RISCV_VDSO_H
+#define _ASM_RISCV_VDSO_H
+
+#include <linux/types.h>
+
+struct vdso_data {
+};
+
+#define VDSO_SYMBOL(base, name)					\
+({								\
+	extern const char __vdso_##name[];			\
+	(void __user *)((unsigned long)(base) + __vdso_##name);	\
+})
+
+#endif /* _ASM_RISCV_VDSO_H */
diff -Nur linux-4.6.2/arch/riscv/include/asm/word-at-a-time.h linux-4.6.2.riscv/arch/riscv/include/asm/word-at-a-time.h
--- linux-4.6.2/arch/riscv/include/asm/word-at-a-time.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/asm/word-at-a-time.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,42 @@
+#ifndef _ASM_RISCV_WORD_AT_A_TIME_H
+#define _ASM_RISCV_WORD_AT_A_TIME_H
+
+/* Derived from arch/x86/include/asm/word-at-a-time.h */
+
+#include <linux/kernel.h>
+
+struct word_at_a_time {
+	const unsigned long one_bits, high_bits;
+};
+
+#define WORD_AT_A_TIME_CONSTANTS { REPEAT_BYTE(0x01), REPEAT_BYTE(0x80) }
+
+static inline unsigned long has_zero(unsigned long val,
+	unsigned long *bits, const struct word_at_a_time *c)
+{
+	unsigned long mask = ((val - c->one_bits) & ~val) & c->high_bits;
+	*bits = mask;
+	return mask;
+}
+
+static inline unsigned long prep_zero_mask(unsigned long val,
+	unsigned long bits, const struct word_at_a_time *c)
+{
+	return bits;
+}
+
+static inline unsigned long create_zero_mask(unsigned long bits)
+{
+	bits = (bits - 1) & ~bits;
+	return bits >> 7;
+}
+
+static inline unsigned long find_zero(unsigned long mask)
+{
+	return fls64(mask) >> 3;
+}
+
+/* The mask we created is directly usable as a bytemask */
+#define zero_bytemask(mask) (mask)
+
+#endif /* _ASM_RISCV_WORD_AT_A_TIME_H */
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/auxvec.h linux-4.6.2.riscv/arch/riscv/include/uapi/asm/auxvec.h
--- linux-4.6.2/arch/riscv/include/uapi/asm/auxvec.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/auxvec.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,7 @@
+#ifndef _UAPI_ASM_RISCV_AUXVEC_H
+#define _UAPI_ASM_RISCV_AUXVEC_H
+
+/* vDSO location */
+#define AT_SYSINFO_EHDR 33
+
+#endif /* _UAPI_ASM_RISCV_AUXVEC_H */
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/bitsperlong.h linux-4.6.2.riscv/arch/riscv/include/uapi/asm/bitsperlong.h
--- linux-4.6.2/arch/riscv/include/uapi/asm/bitsperlong.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/bitsperlong.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,8 @@
+#ifndef _UAPI_ASM_RISCV_BITSPERLONG_H
+#define _UAPI_ASM_RISCV_BITSPERLONG_H
+
+#define __BITS_PER_LONG (__SIZEOF_POINTER__ * 8)
+
+#include <asm-generic/bitsperlong.h>
+
+#endif /* _UAPI_ASM_RISCV_BITSPERLONG_H */
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/byteorder.h linux-4.6.2.riscv/arch/riscv/include/uapi/asm/byteorder.h
--- linux-4.6.2/arch/riscv/include/uapi/asm/byteorder.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/byteorder.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,6 @@
+#ifndef _UAPI_ASM_RISCV_BYTEORDER_H
+#define _UAPI_ASM_RISCV_BYTEORDER_H
+
+#include <linux/byteorder/little_endian.h>
+
+#endif /* _UAPI_ASM_RISCV_BYTEORDER_H */
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/elf.h linux-4.6.2.riscv/arch/riscv/include/uapi/asm/elf.h
--- linux-4.6.2/arch/riscv/include/uapi/asm/elf.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/elf.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,64 @@
+#ifndef _UAPI_ASM_ELF_H
+#define _UAPI_ASM_ELF_H
+
+#include <asm/ptrace.h>
+
+/* ELF register definitions */
+typedef unsigned long elf_greg_t;
+typedef struct user_regs_struct elf_gregset_t;
+#define ELF_NGREG (sizeof(elf_gregset_t) / sizeof(elf_greg_t))
+
+typedef struct user_fpregs_struct elf_fpregset_t;
+
+
+/*
+ * RISC-V relocation types
+ */
+
+/* Relocation types used by the dynamic linker */
+#define R_RISCV_NONE		0
+#define R_RISCV_32		1
+#define R_RISCV_64		2
+#define R_RISCV_RELATIVE	3
+#define R_RISCV_COPY		4
+#define R_RISCV_JUMP_SLOT	5
+#define R_RISCV_TLS_DTPMOD32	6
+#define R_RISCV_TLS_DTPMOD64	7
+#define R_RISCV_TLS_DTPREL32	8
+#define R_RISCV_TLS_DTPREL64	9
+#define R_RISCV_TLS_TPREL32	10
+#define R_RISCV_TLS_TPREL64	11
+
+/* Relocation types not used by the dynamic linker */
+#define R_RISCV_BRANCH		16
+#define R_RISCV_JAL		17
+#define R_RISCV_CALL		18
+#define R_RISCV_CALL_PLT	19
+#define R_RISCV_GOT_HI20	20
+#define R_RISCV_TLS_GOT_HI20	21
+#define R_RISCV_TLS_GD_HI20	22
+#define R_RISCV_PCREL_HI20	23
+#define R_RISCV_PCREL_LO12_I	24
+#define R_RISCV_PCREL_LO12_S	25
+#define R_RISCV_HI20		26
+#define R_RISCV_LO12_I		27
+#define R_RISCV_LO12_S		28
+#define R_RISCV_TPREL_HI20	29
+#define R_RISCV_TPREL_LO12_I	30
+#define R_RISCV_TPREL_LO12_S	31
+#define R_RISCV_TPREL_ADD	32
+#define R_RISCV_ADD8		33
+#define R_RISCV_ADD16		34
+#define R_RISCV_ADD32		35
+#define R_RISCV_ADD64		36
+#define R_RISCV_SUB8		37
+#define R_RISCV_SUB16		38
+#define R_RISCV_SUB32		39
+#define R_RISCV_SUB64		40
+#define R_RISCV_GNU_VTINHERIT	41
+#define R_RISCV_GNU_VTENTRY	42
+#define R_RISCV_ALIGN		43
+#define R_RISCV_RVC_BRANCH	44
+#define R_RISCV_RVC_JUMP	45
+
+#endif /* _UAPI_ASM_ELF_H */
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/Kbuild linux-4.6.2.riscv/arch/riscv/include/uapi/asm/Kbuild
--- linux-4.6.2/arch/riscv/include/uapi/asm/Kbuild	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/Kbuild	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,10 @@
+# UAPI Header export list
+include include/uapi/asm-generic/Kbuild.asm
+
+header-y += auxvec.h
+header-y += bitsperlong.h
+header-y += byteorder.h
+header-y += ptrace.h
+header-y += sigcontext.h
+header-y += siginfo.h
+header-y += unistd.h
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/ptrace.h linux-4.6.2.riscv/arch/riscv/include/uapi/asm/ptrace.h
--- linux-4.6.2/arch/riscv/include/uapi/asm/ptrace.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/ptrace.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,55 @@
+#ifndef _UAPI_ASM_RISCV_PTRACE_H
+#define _UAPI_ASM_RISCV_PTRACE_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+
+/* User-mode register state for core dumps, ptrace, sigcontext
+ *
+ * This decouples struct pt_regs from the userspace ABI.
+ * struct user_regs_struct must form a prefix of struct pt_regs.
+ */
+struct user_regs_struct {
+	unsigned long pc;
+	unsigned long ra;
+	unsigned long sp;
+	unsigned long gp;
+	unsigned long tp;
+	unsigned long t0;
+	unsigned long t1;
+	unsigned long t2;
+	unsigned long s0;
+	unsigned long s1;
+	unsigned long a0;
+	unsigned long a1;
+	unsigned long a2;
+	unsigned long a3;
+	unsigned long a4;
+	unsigned long a5;
+	unsigned long a6;
+	unsigned long a7;
+	unsigned long s2;
+	unsigned long s3;
+	unsigned long s4;
+	unsigned long s5;
+	unsigned long s6;
+	unsigned long s7;
+	unsigned long s8;
+	unsigned long s9;
+	unsigned long s10;
+	unsigned long s11;
+	unsigned long t3;
+	unsigned long t4;
+	unsigned long t5;
+	unsigned long t6;
+};
+
+struct user_fpregs_struct {
+	__u64 f[32];
+	__u32 fcsr;
+};
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _UAPI_ASM_RISCV_PTRACE_H */
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/sigcontext.h linux-4.6.2.riscv/arch/riscv/include/uapi/asm/sigcontext.h
--- linux-4.6.2/arch/riscv/include/uapi/asm/sigcontext.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/sigcontext.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,16 @@
+#ifndef _UAPI_ASM_RISCV_SIGCONTEXT_H
+#define _UAPI_ASM_RISCV_SIGCONTEXT_H
+
+#include <asm/ptrace.h>
+
+/* Signal context structure
+ *
+ * This contains the context saved before a signal handler is invoked;
+ * it is restored by sys_sigreturn / sys_rt_sigreturn.
+ */
+struct sigcontext {
+	struct user_regs_struct sc_regs;
+	struct user_fpregs_struct sc_fpregs;
+};
+
+#endif /* _UAPI_ASM_RISCV_SIGCONTEXT_H */
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/siginfo.h linux-4.6.2.riscv/arch/riscv/include/uapi/asm/siginfo.h
--- linux-4.6.2/arch/riscv/include/uapi/asm/siginfo.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/siginfo.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ * Copyright (C) 2016 SiFive, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_SIGINFO_H
+#define __ASM_SIGINFO_H
+
+#define __ARCH_SI_PREAMBLE_SIZE	(4 * sizeof(int))
+
+#include <asm-generic/siginfo.h>
+
+#endif
diff -Nur linux-4.6.2/arch/riscv/include/uapi/asm/unistd.h linux-4.6.2.riscv/arch/riscv/include/uapi/asm/unistd.h
--- linux-4.6.2/arch/riscv/include/uapi/asm/unistd.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/include/uapi/asm/unistd.h	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,9 @@
+#include <asm-generic/unistd.h>
+
+#define __NR_sysriscv  __NR_arch_specific_syscall
+#ifndef __riscv_atomic
+__SYSCALL(__NR_sysriscv, sys_sysriscv)
+#endif
+
+#define RISCV_ATOMIC_CMPXCHG    1
+#define RISCV_ATOMIC_CMPXCHG64  2
diff -Nur linux-4.6.2/arch/riscv/initramfs.txt linux-4.6.2.riscv/arch/riscv/initramfs.txt
--- linux-4.6.2/arch/riscv/initramfs.txt	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/initramfs.txt	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,9 @@
+dir /bin 755 0 0
+file /bin/busybox tmp/bin/busybox 755 0 0
+dir /etc 755 0 0
+file /etc/inittab tmp/etc/inittab 755 0 0
+
+dir /dev 755 0 0
+nod /dev/console 644 0 0 c 5 1
+nod /dev/null 644 0 0 c 1 3
+slink /init /bin/busybox 755 0 0
diff -Nur linux-4.6.2/arch/riscv/Kconfig linux-4.6.2.riscv/arch/riscv/Kconfig
--- linux-4.6.2/arch/riscv/Kconfig	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/Kconfig	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1,284 @@
+#
+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/kconfig-language.txt.
+#
+
+config RISCV
+	def_bool y
+	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+	select ARCH_WANT_FRAME_POINTERS
+	select CLONE_BACKWARDS
+	select COMMON_CLK
+	select GENERIC_CLOCKEVENTS
+	select GENERIC_CPU_DEVICES
+	select GENERIC_IRQ_SHOW
+	select GENERIC_PCI_IOMAP
+	select GENERIC_STRNCPY_FROM_USER
+	select GENERIC_STRNLEN_USER
+	select GENERIC_SMP_IDLE_THREAD
+	select GENERIC_ATOMIC64 if !64BIT || !RV_ATOMIC
+	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select HAVE_MEMBLOCK
+	select HAVE_MEMBLOCK_NODE_MAP
+	select HAVE_DMA_API_DEBUG
+	select HAVE_DMA_CONTIGUOUS
+	select HAVE_GENERIC_DMA_COHERENT
+	select IRQ_DOMAIN
+	select NO_BOOTMEM
+	select RV_ATOMIC if SMP
+	select RV_SYSRISCV_ATOMIC if !RV_ATOMIC
+	select SPARSE_IRQ
+	select SYSCTL_EXCEPTION_TRACE
+	select HAVE_ARCH_TRACEHOOK
+
+config MMU
+	def_bool y
+
+# even on 32-bit, physical (and DMA) addresses are > 32-bits
+config ARCH_PHYS_ADDR_T_64BIT
+	def_bool y
+
+config ARCH_DMA_ADDR_T_64BIT
+	def_bool y
+
+config STACKTRACE_SUPPORT
+	def_bool y
+
+config RWSEM_GENERIC_SPINLOCK
+	def_bool y
+
+config GENERIC_BUG
+	def_bool y
+	depends on BUG
+	select GENERIC_BUG_RELATIVE_POINTERS if 64BIT
+
+config GENERIC_BUG_RELATIVE_POINTERS
+	bool
+
+config GENERIC_CALIBRATE_DELAY
+	def_bool y
+
+config GENERIC_CSUM
+	def_bool y
+
+config GENERIC_HWEIGHT
+	def_bool y
+
+config PGTABLE_LEVELS
+	int
+	default 3 if 64BIT
+	default 2
+
+menu "Platform type"
+
+config SMP
+	bool "Symmetric Multi-Processing"
+	help
+	  This enables support for systems with more than one CPU.  If
+	  you say N here, the kernel will run on single and
+	  multiprocessor machines, but will use only one CPU of a
+	  multiprocessor machine. If you say Y here, the kernel will run
+	  on many, but not all, single processor machines. On a single
+	  processor machine, the kernel will run faster if you say N
+	  here.
+
+	  If you don't know what to do here, say N.
+
+config NR_CPUS
+	int "Maximum number of CPUs (2-32)"
+	range 2 32
+	depends on SMP
+	default "8"
+
+choice
+	prompt "CPU selection"
+	default CPU_RV_ROCKET
+
+config CPU_RV_ROCKET
+	bool "Rocket"
+	select CPU_SUPPORTS_64BIT_KERNEL
+
+config CPU_RV_GENERIC
+	bool "Generic RISC-V"
+	select CPU_SUPPORTS_32BIT_KERNEL
+	select CPU_SUPPORTS_64BIT_KERNEL
+
+endchoice
+
+config CPU_SUPPORTS_32BIT_KERNEL
+	bool
+config CPU_SUPPORTS_64BIT_KERNEL
+	bool
+
+config SBI_CONSOLE
+	tristate "SBI console support"
+	select TTY
+	default y
+
+config RVC
+	bool "Use compressed instructions (RV32C or RV64C)"
+	default n
+
+config RV_ATOMIC
+	bool "Use atomic memory instructions (RV32A or RV64A)"
+	default y
+
+config RV_SYSRISCV_ATOMIC
+	bool "Include support for atomic operation syscalls"
+	default n
+	help
+	  If atomic memory instructions are present, i.e.,
+	  CONFIG_RV_ATOMIC, this includes support for the syscall that
+	  provides atomic accesses.  This is only useful to run
+	  binaries that require atomic access but were compiled with
+	  -mno-atomic.
+
+	  If CONFIG_RV_ATOMIC is unset, this option is mandatory.
+
+config RV_PUM
+	def_bool y
+	prompt "Protect User Memory" if EXPERT
+	---help---
+	  Protect User Memory (PUM) prevents the kernel from inadvertently
+	  accessing user-space memory.  There is a small performance cost
+	  and kernel size increase if this is enabled.
+
+	  If unsure, say Y.
+
+endmenu
+
+menu "Kernel type"
+
+choice
+	prompt "Kernel code model"
+	default 64BIT
+
+config 32BIT
+	bool "32-bit kernel"
+	depends on CPU_SUPPORTS_32BIT_KERNEL
+	help
+	  Select this option to build a 32-bit kernel.
+
+config 64BIT
+	bool "64-bit kernel"
+	depends on CPU_SUPPORTS_64BIT_KERNEL
+	help
+	  Select this option to build a 64-bit kernel.
+
+endchoice
+
+source "mm/Kconfig"
+
+source "kernel/Kconfig.preempt"
+
+source "kernel/Kconfig.hz"
+
+endmenu
+
+menu "Bus support"
+
+config PCI
+	bool "PCI support"
+	select PCI_MSI
+	help
+	  This feature enables support for PCI bus system. If you say Y
+	  here, the kernel will include drivers and infrastructure code
+	  to support PCI bus devices.
+
+config PCI_DOMAINS
+	def_bool PCI
+
+config PCI_DOMAINS_GENERIC
+	def_bool PCI
+
+config PCI_SYSCALL
+	def_bool PCI
+
+source "drivers/pci/Kconfig"
+
+endmenu
+
+source "init/Kconfig"
+
+source "kernel/Kconfig.freezer"
+
+menu "Executable file formats"
+
+source "fs/Kconfig.binfmt"
+
+endmenu
+
+menu "Power management options"
+
+source kernel/power/Kconfig
+
+endmenu
+
+source "net/Kconfig"
+
+source "drivers/Kconfig"
+
+source "fs/Kconfig"
+
+menu "Kernel hacking"
+
+config CMDLINE_BOOL
+	bool "Built-in kernel command line"
+	default n
+	help
+	  For most platforms, it is firmware or second stage bootloader
+	  that by default specifies the kernel command line options.
+	  However, it might be necessary or advantageous to either override
+	  the default kernel command line or add a few extra options to it.
+	  For such cases, this option allows hardcoding command line options
+	  directly into the kernel.
+
+	  For that, choose 'Y' here and fill in the extra boot parameters
+	  in CONFIG_CMDLINE.
+
+	  The built-in options will be concatenated to the default command
+	  line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
+	  command line will be ignored and replaced by the built-in string.
+
+config CMDLINE
+	string "Built-in kernel command string"
+	depends on CMDLINE_BOOL
+	default ""
+	help
+	  Supply command-line options at build time by entering them here.
+
+config CMDLINE_OVERRIDE
+	bool "Built-in command line overrides bootloader arguments"
+	default n
+	depends on CMDLINE_BOOL
+	help
+	  Set this option to 'Y' to have the kernel ignore the bootloader
+	  or firmware command line.  Instead, the built-in command line
+	  will be used exclusively.
+
+config EARLY_PRINTK
+	bool "Early printk"
+	default n
+	help
+	  This option enables special console drivers which allow the kernel
+	  to print messages very early in the bootup process.
+
+	  This is useful for kernel debugging when your machine crashes very
+	  early before the console code is initialized. For normal operation
+	  it is not recommended because it looks ugly and doesn't cooperate
+	  with klogd/syslogd or the X server. You should normally N here,
+	  unless you want to debug such a crash.
+
+
+source "lib/Kconfig.debug"
+
+config CMDLINE_BOOL
+	bool 
+endmenu
+
+source "security/Kconfig"
+
+source "crypto/Kconfig"
+
+source "lib/Kconfig"
+
diff -Nur linux-4.6.2/arch/riscv/kernel/asm-offsets.c linux-4.6.2.riscv/arch/riscv/kernel/asm-offsets.c
--- linux-4.6.2/arch/riscv/kernel/asm-offsets.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/asm-offsets.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,99 @@
+#include <linux/kbuild.h>
+#include <linux/sched.h>
+#include <asm/thread_info.h>
+#include <asm/ptrace.h>
+
+void asm_offsets(void)
+{
+	OFFSET(TASK_THREAD_INFO, task_struct, stack);
+	OFFSET(THREAD_RA, task_struct, thread.ra);
+	OFFSET(THREAD_SP, task_struct, thread.sp);
+	OFFSET(THREAD_S0, task_struct, thread.s[0]);
+	OFFSET(THREAD_S1, task_struct, thread.s[1]);
+	OFFSET(THREAD_S2, task_struct, thread.s[2]);
+	OFFSET(THREAD_S3, task_struct, thread.s[3]);
+	OFFSET(THREAD_S4, task_struct, thread.s[4]);
+	OFFSET(THREAD_S5, task_struct, thread.s[5]);
+	OFFSET(THREAD_S6, task_struct, thread.s[6]);
+	OFFSET(THREAD_S7, task_struct, thread.s[7]);
+	OFFSET(THREAD_S8, task_struct, thread.s[8]);
+	OFFSET(THREAD_S9, task_struct, thread.s[9]);
+	OFFSET(THREAD_S10, task_struct, thread.s[10]);
+	OFFSET(THREAD_S11, task_struct, thread.s[11]);
+	OFFSET(THREAD_SP, task_struct, thread.sp);
+	OFFSET(TI_TASK, thread_info, task);
+	OFFSET(TI_FLAGS, thread_info, flags);
+	OFFSET(TI_CPU, thread_info, cpu);
+
+	OFFSET(THREAD_F0,  task_struct, thread.fstate.f[0]);
+	OFFSET(THREAD_F1,  task_struct, thread.fstate.f[1]);
+	OFFSET(THREAD_F2,  task_struct, thread.fstate.f[2]);
+	OFFSET(THREAD_F3,  task_struct, thread.fstate.f[3]);
+	OFFSET(THREAD_F4,  task_struct, thread.fstate.f[4]);
+	OFFSET(THREAD_F5,  task_struct, thread.fstate.f[5]);
+	OFFSET(THREAD_F6,  task_struct, thread.fstate.f[6]);
+	OFFSET(THREAD_F7,  task_struct, thread.fstate.f[7]);
+	OFFSET(THREAD_F8,  task_struct, thread.fstate.f[8]);
+	OFFSET(THREAD_F9,  task_struct, thread.fstate.f[9]);
+	OFFSET(THREAD_F10, task_struct, thread.fstate.f[10]);
+	OFFSET(THREAD_F11, task_struct, thread.fstate.f[11]);
+	OFFSET(THREAD_F12, task_struct, thread.fstate.f[12]);
+	OFFSET(THREAD_F13, task_struct, thread.fstate.f[13]);
+	OFFSET(THREAD_F14, task_struct, thread.fstate.f[14]);
+	OFFSET(THREAD_F15, task_struct, thread.fstate.f[15]);
+	OFFSET(THREAD_F16, task_struct, thread.fstate.f[16]);
+	OFFSET(THREAD_F17, task_struct, thread.fstate.f[17]);
+	OFFSET(THREAD_F18, task_struct, thread.fstate.f[18]);
+	OFFSET(THREAD_F19, task_struct, thread.fstate.f[19]);
+	OFFSET(THREAD_F20, task_struct, thread.fstate.f[20]);
+	OFFSET(THREAD_F21, task_struct, thread.fstate.f[21]);
+	OFFSET(THREAD_F22, task_struct, thread.fstate.f[22]);
+	OFFSET(THREAD_F23, task_struct, thread.fstate.f[23]);
+	OFFSET(THREAD_F24, task_struct, thread.fstate.f[24]);
+	OFFSET(THREAD_F25, task_struct, thread.fstate.f[25]);
+	OFFSET(THREAD_F26, task_struct, thread.fstate.f[26]);
+	OFFSET(THREAD_F27, task_struct, thread.fstate.f[27]);
+	OFFSET(THREAD_F28, task_struct, thread.fstate.f[28]);
+	OFFSET(THREAD_F29, task_struct, thread.fstate.f[29]);
+	OFFSET(THREAD_F30, task_struct, thread.fstate.f[30]);
+	OFFSET(THREAD_F31, task_struct, thread.fstate.f[31]);
+	OFFSET(THREAD_FCSR, task_struct, thread.fstate.fcsr);
+
+	DEFINE(PT_SIZE, sizeof(struct pt_regs));
+	OFFSET(PT_SEPC, pt_regs, sepc);
+	OFFSET(PT_RA, pt_regs, ra);
+	OFFSET(PT_FP, pt_regs, s0);
+	OFFSET(PT_S0, pt_regs, s0);
+	OFFSET(PT_S1, pt_regs, s1);
+	OFFSET(PT_S2, pt_regs, s2);
+	OFFSET(PT_S3, pt_regs, s3);
+	OFFSET(PT_S4, pt_regs, s4);
+	OFFSET(PT_S5, pt_regs, s5);
+	OFFSET(PT_S6, pt_regs, s6);
+	OFFSET(PT_S7, pt_regs, s7);
+	OFFSET(PT_S8, pt_regs, s8);
+	OFFSET(PT_S9, pt_regs, s9);
+	OFFSET(PT_S10, pt_regs, s10);
+	OFFSET(PT_S11, pt_regs, s11);
+	OFFSET(PT_SP, pt_regs, sp);
+	OFFSET(PT_TP, pt_regs, tp);
+	OFFSET(PT_A0, pt_regs, a0);
+	OFFSET(PT_A1, pt_regs, a1);
+	OFFSET(PT_A2, pt_regs, a2);
+	OFFSET(PT_A3, pt_regs, a3);
+	OFFSET(PT_A4, pt_regs, a4);
+	OFFSET(PT_A5, pt_regs, a5);
+	OFFSET(PT_A6, pt_regs, a6);
+	OFFSET(PT_A7, pt_regs, a7);
+	OFFSET(PT_T0, pt_regs, t0);
+	OFFSET(PT_T1, pt_regs, t1);
+	OFFSET(PT_T2, pt_regs, t2);
+	OFFSET(PT_T3, pt_regs, t3);
+	OFFSET(PT_T4, pt_regs, t4);
+	OFFSET(PT_T5, pt_regs, t5);
+	OFFSET(PT_T6, pt_regs, t6);
+	OFFSET(PT_GP, pt_regs, gp);
+	OFFSET(PT_SSTATUS, pt_regs, sstatus);
+	OFFSET(PT_SBADADDR, pt_regs, sbadaddr);
+	OFFSET(PT_SCAUSE, pt_regs, scause);
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/cpu.c linux-4.6.2.riscv/arch/riscv/kernel/cpu.c
--- linux-4.6.2/arch/riscv/kernel/cpu.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/cpu.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,41 @@
+#include <linux/init.h>
+#include <linux/seq_file.h>
+
+#ifdef CONFIG_PROC_FS
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+	*pos = cpumask_next(*pos - 1, cpu_online_mask);
+	if ((*pos) < nr_cpu_ids)
+		return (void *)(uintptr_t)(1 + *pos);
+	return NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	(*pos)++;
+	return c_start(m, pos);
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+static int c_show(struct seq_file *m, void *v)
+{
+	unsigned long hart_id = (unsigned long)v - 1;
+
+	seq_printf(m, "hart\t: %lu\n", hart_id);
+	seq_printf(m, "isa\t: RV%zuG\n", sizeof(void *) * 8);
+	seq_printf(m, "\n");
+	return 0;
+}
+
+const struct seq_operations cpuinfo_op = {
+	.start	= c_start,
+	.next	= c_next,
+	.stop	= c_stop,
+	.show	= c_show
+};
+
+#endif /* CONFIG_PROC_FS */
diff -Nur linux-4.6.2/arch/riscv/kernel/entry.S linux-4.6.2.riscv/arch/riscv/kernel/entry.S
--- linux-4.6.2/arch/riscv/kernel/entry.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/entry.S	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,399 @@
+#include <linux/init.h>
+#include <linux/linkage.h>
+
+#include <asm/asm.h>
+#include <asm/csr.h>
+#include <asm/unistd.h>
+#include <asm/thread_info.h>
+#include <asm/asm-offsets.h>
+
+	.text
+	.altmacro
+	.macro SAVE_ALL
+	LOCAL _restore_kernel_sp
+	LOCAL _save_context
+
+	/* If coming from userspace, preserve the user stack pointer and load
+	   the kernel stack pointer.  If we came from the kernel, sscratch
+	   will contain 0, and we should continue on the current stack. */
+	csrrw sp, sscratch, sp
+	bnez sp, _save_context
+
+_restore_kernel_sp:
+	csrr sp, sscratch
+_save_context:
+	addi sp, sp, -(PT_SIZE)
+	REG_S x1,  PT_RA(sp)
+	REG_S x3,  PT_GP(sp)
+	REG_S x4,  PT_TP(sp)
+	REG_S x5,  PT_T0(sp)
+	REG_S x6,  PT_T1(sp)
+	REG_S x7,  PT_T2(sp)
+	REG_S x8,  PT_S0(sp)
+	REG_S x9,  PT_S1(sp)
+	REG_S x10, PT_A0(sp)
+	REG_S x11, PT_A1(sp)
+	REG_S x12, PT_A2(sp)
+	REG_S x13, PT_A3(sp)
+	REG_S x14, PT_A4(sp)
+	REG_S x15, PT_A5(sp)
+	REG_S x16, PT_A6(sp)
+	REG_S x17, PT_A7(sp)
+	REG_S x18, PT_S2(sp)
+	REG_S x19, PT_S3(sp)
+	REG_S x20, PT_S4(sp)
+	REG_S x21, PT_S5(sp)
+	REG_S x22, PT_S6(sp)
+	REG_S x23, PT_S7(sp)
+	REG_S x24, PT_S8(sp)
+	REG_S x25, PT_S9(sp)
+	REG_S x26, PT_S10(sp)
+	REG_S x27, PT_S11(sp)
+	REG_S x28, PT_T3(sp)
+	REG_S x29, PT_T4(sp)
+	REG_S x30, PT_T5(sp)
+	REG_S x31, PT_T6(sp)
+
+	/* Disable FPU to detect illegal usage of
+	   floating point in kernel space */
+	li t0, SR_FS
+
+	csrr s0, sscratch
+	csrrc s1, sstatus, t0
+	csrr s2, sepc
+	csrr s3, sbadaddr
+	csrr s4, scause
+	REG_S s0, PT_SP(sp)
+	REG_S s1, PT_SSTATUS(sp)
+	REG_S s2, PT_SEPC(sp)
+	REG_S s3, PT_SBADADDR(sp)
+	REG_S s4, PT_SCAUSE(sp)
+	.endm
+
+	.macro RESTORE_ALL
+	REG_L a0, PT_SSTATUS(sp)
+	REG_L a2, PT_SEPC(sp)
+	csrw sstatus, a0
+	csrw sepc, a2
+
+	REG_L x1,  PT_RA(sp)
+	REG_L x3,  PT_GP(sp)
+	REG_L x4,  PT_TP(sp)
+	REG_L x5,  PT_T0(sp)
+	REG_L x6,  PT_T1(sp)
+	REG_L x7,  PT_T2(sp)
+	REG_L x8,  PT_S0(sp)
+	REG_L x9,  PT_S1(sp)
+	REG_L x10, PT_A0(sp)
+	REG_L x11, PT_A1(sp)
+	REG_L x12, PT_A2(sp)
+	REG_L x13, PT_A3(sp)
+	REG_L x14, PT_A4(sp)
+	REG_L x15, PT_A5(sp)
+	REG_L x16, PT_A6(sp)
+	REG_L x17, PT_A7(sp)
+	REG_L x18, PT_S2(sp)
+	REG_L x19, PT_S3(sp)
+	REG_L x20, PT_S4(sp)
+	REG_L x21, PT_S5(sp)
+	REG_L x22, PT_S6(sp)
+	REG_L x23, PT_S7(sp)
+	REG_L x24, PT_S8(sp)
+	REG_L x25, PT_S9(sp)
+	REG_L x26, PT_S10(sp)
+	REG_L x27, PT_S11(sp)
+	REG_L x28, PT_T3(sp)
+	REG_L x29, PT_T4(sp)
+	REG_L x30, PT_T5(sp)
+	REG_L x31, PT_T6(sp)
+
+	REG_L x2,  PT_SP(sp)
+	.endm
+
+ENTRY(handle_exception)
+	SAVE_ALL
+
+	/* Set sscratch register to 0, so that if a recursive exception
+	   occurs, the exception vector knows it came from the kernel */
+	csrw sscratch, x0
+
+	/* Compute address of current thread_info */
+	li tp, ~(THREAD_SIZE-1)
+	and tp, tp, sp
+	/* Set current pointer */
+	REG_L tp, TI_TASK(tp)
+
+1:	auipc gp, %pcrel_hi(_gp)
+	addi gp, gp, %pcrel_lo(1b)
+
+	la ra, ret_from_exception
+	/* MSB of cause differentiates between
+	   interrupts and exceptions */
+	bge s4, zero, 1f
+
+	/* Handle interrupts */
+	slli a0, s4, 1
+	srli a0, a0, 1
+	move a1, sp /* pt_regs */
+	tail do_IRQ
+1:
+	/* Handle syscalls */
+	li t0, EXC_SYSCALL
+	beq s4, t0, handle_syscall
+
+	/* Handle other exceptions */
+	slli t0, s4, LGPTR
+	la t1, excp_vect_table
+	la t2, excp_vect_table_end
+	move a0, sp /* pt_regs */
+	add t0, t1, t0
+	/* Check if exception code lies within bounds */
+	bgeu t0, t2, 1f
+	REG_L t0, 0(t0)
+	jr t0
+1:
+	tail do_trap_unknown
+
+handle_syscall:
+	/* Advance SEPC to avoid executing the original
+	   scall instruction on sret */
+	addi s2, s2, 0x4
+	REG_S s2, PT_SEPC(sp)
+	/* System calls run with interrupts enabled */
+	csrs sstatus, SR_IE
+	/* Trace syscalls, but only if requested by the user. */
+	REG_L t0, TASK_THREAD_INFO(tp)
+	REG_L t0, TI_FLAGS(t0)
+	andi t0, t0, _TIF_SYSCALL_TRACE
+	bnez t0, handle_syscall_trace_enter
+check_syscall_nr:
+	/* Check to make sure we don't jump to a bogus syscall number. */
+	li t0, __NR_syscalls
+	la s0, sys_ni_syscall
+	/* Syscall number held in a7 */
+	bgeu a7, t0, 1f
+	la s0, sys_call_table
+	slli t0, a7, LGPTR
+	add s0, s0, t0
+	REG_L s0, 0(s0)
+1:
+	jalr s0
+
+ret_from_syscall:
+	/* Set user a0 to kernel a0 */
+	REG_S a0, PT_A0(sp)
+	/* Trace syscalls, but only if requested by the user. */
+	REG_L t0, TASK_THREAD_INFO(tp)
+	REG_L t0, TI_FLAGS(t0)
+	andi t0, t0, _TIF_SYSCALL_TRACE
+	bnez t0, handle_syscall_trace_exit
+
+ret_from_exception:
+	REG_L s0, PT_SSTATUS(sp)
+	csrc sstatus, SR_IE
+	andi s0, s0, SR_PS
+	bnez s0, restore_all
+
+resume_userspace:
+	/* Interrupts must be disabled here so flags are checked atomically */
+	REG_L s0, TASK_THREAD_INFO(tp)
+	REG_L s0, TI_FLAGS(s0) /* current_thread_info->flags */
+	andi s1, s0, _TIF_WORK_MASK
+	bnez s1, work_pending
+
+	/* Save unwound kernel stack pointer in sscratch */
+	addi s0, sp, PT_SIZE
+	csrw sscratch, s0
+restore_all:
+	RESTORE_ALL
+	sret
+
+work_pending:
+	/* Enter slow path for supplementary processing */
+	la ra, ret_from_exception
+	andi s1, s0, _TIF_NEED_RESCHED
+	bnez s1, work_resched
+work_notifysig:
+	/* Handle pending signals and notify-resume requests */
+	csrs sstatus, SR_IE /* Enable interrupts for do_notify_resume() */
+	move a0, sp /* pt_regs */
+	move a1, s0 /* current_thread_info->flags */
+	tail do_notify_resume
+work_resched:
+	tail schedule
+
+/* Slow paths for ptrace. */
+handle_syscall_trace_enter:
+	move a0, sp
+	call do_syscall_trace_enter
+	REG_L a0, PT_A0(sp)
+	REG_L a1, PT_A1(sp)
+	REG_L a2, PT_A2(sp)
+	REG_L a3, PT_A3(sp)
+	REG_L a4, PT_A4(sp)
+	REG_L a5, PT_A5(sp)
+	REG_L a6, PT_A6(sp)
+	REG_L a7, PT_A7(sp)
+	j check_syscall_nr
+handle_syscall_trace_exit:
+	move a0, sp
+	call do_syscall_trace_exit
+	j ret_from_exception
+
+END(handle_exception)
+
+ENTRY(ret_from_fork)
+	la ra, ret_from_exception
+	tail schedule_tail
+ENDPROC(ret_from_fork)
+
+ENTRY(ret_from_kernel_thread)
+	call schedule_tail
+	/* Call fn(arg) */
+	la ra, ret_from_exception
+	move a0, s1
+	jr s0
+ENDPROC(ret_from_kernel_thread)
+
+
+/*
+ * Integer register context switch
+ * The callee-saved registers must be saved and restored.
+ * 
+ *   a0: previous task_struct (must be preserved across the switch)
+ *   a1: next task_struct
+ */
+ENTRY(__switch_to)
+	/* Save context into prev->thread */
+	REG_S ra,  THREAD_RA(a0)
+	REG_S sp,  THREAD_SP(a0)
+	REG_S s0,  THREAD_S0(a0)
+	REG_S s1,  THREAD_S1(a0)
+	REG_S s2,  THREAD_S2(a0)
+	REG_S s3,  THREAD_S3(a0)
+	REG_S s4,  THREAD_S4(a0)
+	REG_S s5,  THREAD_S5(a0)
+	REG_S s6,  THREAD_S6(a0)
+	REG_S s7,  THREAD_S7(a0)
+	REG_S s8,  THREAD_S8(a0)
+	REG_S s9,  THREAD_S9(a0)
+	REG_S s10, THREAD_S10(a0)
+	REG_S s11, THREAD_S11(a0)
+	/* Restore context from next->thread */
+	REG_L ra,  THREAD_RA(a1)
+	REG_L sp,  THREAD_SP(a1)
+	REG_L s0,  THREAD_S0(a1)
+	REG_L s1,  THREAD_S1(a1)
+	REG_L s2,  THREAD_S2(a1)
+	REG_L s3,  THREAD_S3(a1)
+	REG_L s4,  THREAD_S4(a1)
+	REG_L s5,  THREAD_S5(a1)
+	REG_L s6,  THREAD_S6(a1)
+	REG_L s7,  THREAD_S7(a1)
+	REG_L s8,  THREAD_S8(a1)
+	REG_L s9,  THREAD_S9(a1)
+	REG_L s10, THREAD_S10(a1)
+	REG_L s11, THREAD_S11(a1)
+	mv tp, a1 /* Next current pointer */
+	ret
+ENDPROC(__switch_to)
+
+ENTRY(__fstate_save)
+	li t1, SR_FS
+	csrs sstatus, t1
+	frcsr t0
+	fsd f0,  THREAD_F0(a0)
+	fsd f1,  THREAD_F1(a0)
+	fsd f2,  THREAD_F2(a0)
+	fsd f3,  THREAD_F3(a0)
+	fsd f4,  THREAD_F4(a0)
+	fsd f5,  THREAD_F5(a0)
+	fsd f6,  THREAD_F6(a0)
+	fsd f7,  THREAD_F7(a0)
+	fsd f8,  THREAD_F8(a0)
+	fsd f9,  THREAD_F9(a0)
+	fsd f10, THREAD_F10(a0)
+	fsd f11, THREAD_F11(a0)
+	fsd f12, THREAD_F12(a0)
+	fsd f13, THREAD_F13(a0)
+	fsd f14, THREAD_F14(a0)
+	fsd f15, THREAD_F15(a0)
+	fsd f16, THREAD_F16(a0)
+	fsd f17, THREAD_F17(a0)
+	fsd f18, THREAD_F18(a0)
+	fsd f19, THREAD_F19(a0)
+	fsd f20, THREAD_F20(a0)
+	fsd f21, THREAD_F21(a0)
+	fsd f22, THREAD_F22(a0)
+	fsd f23, THREAD_F23(a0)
+	fsd f24, THREAD_F24(a0)
+	fsd f25, THREAD_F25(a0)
+	fsd f26, THREAD_F26(a0)
+	fsd f27, THREAD_F27(a0)
+	fsd f28, THREAD_F28(a0)
+	fsd f29, THREAD_F29(a0)
+	fsd f30, THREAD_F30(a0)
+	fsd f31, THREAD_F31(a0)
+	sw t0, THREAD_FCSR(a0)
+	csrc sstatus, t1
+	ret
+ENDPROC(__fstate_save)
+
+ENTRY(__fstate_restore)
+	li t1, SR_FS
+	lw t0, THREAD_FCSR(a0)
+	csrs sstatus, t1
+	fld f0,  THREAD_F0(a0)
+	fld f1,  THREAD_F1(a0)
+	fld f2,  THREAD_F2(a0)
+	fld f3,  THREAD_F3(a0)
+	fld f4,  THREAD_F4(a0)
+	fld f5,  THREAD_F5(a0)
+	fld f6,  THREAD_F6(a0)
+	fld f7,  THREAD_F7(a0)
+	fld f8,  THREAD_F8(a0)
+	fld f9,  THREAD_F9(a0)
+	fld f10, THREAD_F10(a0)
+	fld f11, THREAD_F11(a0)
+	fld f12, THREAD_F12(a0)
+	fld f13, THREAD_F13(a0)
+	fld f14, THREAD_F14(a0)
+	fld f15, THREAD_F15(a0)
+	fld f16, THREAD_F16(a0)
+	fld f17, THREAD_F17(a0)
+	fld f18, THREAD_F18(a0)
+	fld f19, THREAD_F19(a0)
+	fld f20, THREAD_F20(a0)
+	fld f21, THREAD_F21(a0)
+	fld f22, THREAD_F22(a0)
+	fld f23, THREAD_F23(a0)
+	fld f24, THREAD_F24(a0)
+	fld f25, THREAD_F25(a0)
+	fld f26, THREAD_F26(a0)
+	fld f27, THREAD_F27(a0)
+	fld f28, THREAD_F28(a0)
+	fld f29, THREAD_F29(a0)
+	fld f30, THREAD_F30(a0)
+	fld f31, THREAD_F31(a0)
+	fscsr t0
+	csrc sstatus, t1
+	ret
+ENDPROC(__fstate_restore)
+
+
+	.section ".rodata"
+	/* Exception vector table */
+ENTRY(excp_vect_table)
+	PTR do_trap_insn_misaligned
+	PTR do_page_fault
+	PTR do_trap_insn_illegal
+	PTR do_trap_unknown
+	PTR do_trap_unknown
+	PTR do_page_fault
+	PTR do_trap_amo_misaligned
+	PTR do_page_fault
+	PTR 0 /* handle_syscall */
+	PTR do_trap_break
+excp_vect_table_end:
+END(excp_vect_table)
+
diff -Nur linux-4.6.2/arch/riscv/kernel/head.S linux-4.6.2.riscv/arch/riscv/kernel/head.S
--- linux-4.6.2/arch/riscv/kernel/head.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/head.S	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,77 @@
+#include <asm/thread_info.h>
+#include <asm/asm-offsets.h>
+#include <asm/asm.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+#include <asm/csr.h>
+
+__INIT
+ENTRY(_start)
+	/* Load the global pointer (before any use of la) */
+1:	auipc gp, %pcrel_hi(_gp)
+	addi gp, gp, %pcrel_lo(1b)
+
+	/* Disable FPU to detect illegal usage of
+	   floating point in kernel space */
+	li t0, SR_FS
+	csrc sstatus, t0
+
+#ifdef CONFIG_RV_PUM
+	/* Prevent inadvertent access to user memory */
+	li t0, SR_PUM
+	csrs sstatus, t0
+#endif
+
+	/* See if we're the main hart */
+	call sbi_hart_id
+	bnez a0, .Lsecondary_start
+
+	/* Clear the .bss segment */
+	la a0, __bss_start
+	li a1, 0
+	la a2, __bss_stop
+	sub a2, a2, a0
+	call memset
+
+	/* Initialize stack pointer */
+	la sp, init_thread_union + THREAD_SIZE
+	/* Initialize current task_struct pointer */
+	la tp, init_task
+
+	tail start_kernel
+
+.Lsecondary_start:
+#ifdef CONFIG_SMP
+	li a1, CONFIG_NR_CPUS
+	bgeu a0, a1, .Lsecondary_park
+
+	la a1, __cpu_up_stack_pointer
+	slli a0, a0, LGREG
+	add a0, a0, a1
+
+.Lwait_for_cpu_up:
+	REG_L sp, (a0)
+	beqz sp, .Lwait_for_cpu_up
+
+	/* Initialize task_struct pointer */
+	li tp, -THREAD_SIZE
+	add tp, tp, sp
+	REG_L tp, (tp)
+
+	tail smp_callin
+#endif
+
+.Lsecondary_park:
+	/* We lack SMP support or have too many harts, so park this hart */
+	wfi
+	j .Lsecondary_park
+END(_start)
+
+__PAGE_ALIGNED_BSS
+	/* Empty zero page */
+	.balign PAGE_SIZE
+ENTRY(empty_zero_page)
+	.fill (empty_zero_page + PAGE_SIZE) - ., 1, 0x00
+END(empty_zero_page)
diff -Nur linux-4.6.2/arch/riscv/kernel/irq.c linux-4.6.2.riscv/arch/riscv/kernel/irq.c
--- linux-4.6.2/arch/riscv/kernel/irq.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/irq.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,102 @@
+#include <linux/interrupt.h>
+#include <linux/ftrace.h>
+#include <linux/seq_file.h>
+
+#include <asm/ptrace.h>
+#include <asm/sbi.h>
+#include <asm/sbi-con.h>
+#include <asm/smp.h>
+
+struct plic_context {
+	volatile int priority_threshold;
+	volatile int claim;
+};
+
+static DEFINE_PER_CPU(struct plic_context *, plic_context);
+static DEFINE_PER_CPU(unsigned int, irq_in_progress);
+
+static void riscv_software_interrupt(void)
+{
+	irqreturn_t ret;
+
+#ifdef CONFIG_SMP
+	ret = handle_ipi();
+	if (ret != IRQ_NONE)
+		return;
+#endif
+
+	ret = sbi_console_isr();
+	if (ret != IRQ_NONE)
+		return;
+
+	BUG();
+}
+
+static void plic_interrupt(void)
+{
+	unsigned int cpu = smp_processor_id();
+	unsigned int irq = per_cpu(plic_context, cpu)->claim;
+
+	BUG_ON(per_cpu(irq_in_progress, cpu) != 0);
+
+	if (irq) {
+		per_cpu(irq_in_progress, cpu) = irq;
+		generic_handle_irq(irq);
+	}
+}
+
+asmlinkage void __irq_entry do_IRQ(unsigned int cause, struct pt_regs *regs)
+{
+	struct pt_regs *old_regs = set_irq_regs(regs);
+	irq_enter();
+
+	/* There are three classes of interrupt: timer, software, and
+	   external devices.  We dispatch between them here.  External
+	   device interrupts use the generic IRQ mechanisms. */
+	switch (cause) {
+		case INTERRUPT_CAUSE_TIMER:
+			riscv_timer_interrupt();
+			break;
+		case INTERRUPT_CAUSE_SOFTWARE:
+			riscv_software_interrupt();
+			break;
+		case INTERRUPT_CAUSE_EXTERNAL:
+			plic_interrupt();
+			break;
+		default:
+			BUG();
+	}
+
+	irq_exit();
+	set_irq_regs(old_regs);
+}
+
+static void plic_irq_mask(struct irq_data *d)
+{
+	unsigned int cpu = smp_processor_id();
+
+	BUG_ON(d->irq != per_cpu(irq_in_progress, cpu));
+}
+
+static void plic_irq_unmask(struct irq_data *d)
+{
+	unsigned int cpu = smp_processor_id();
+
+	BUG_ON(d->irq != per_cpu(irq_in_progress, cpu));
+
+	per_cpu(plic_context, cpu)->claim = per_cpu(irq_in_progress, cpu);
+	per_cpu(irq_in_progress, cpu) = 0;
+}
+
+struct irq_chip plic_irq_chip = {
+	.name = "riscv",
+	.irq_mask = plic_irq_mask,
+	.irq_mask_ack = plic_irq_mask,
+	.irq_unmask = plic_irq_unmask,
+};
+
+void __init init_IRQ(void)
+{
+	/* Enable software interrupts (and disable the others) */
+	csr_write(sie, SIE_SSIE);
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/Makefile linux-4.6.2.riscv/arch/riscv/kernel/Makefile
--- linux-4.6.2/arch/riscv/kernel/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/Makefile	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,15 @@
+#
+# Makefile for the RISC-V Linux kernel
+#
+
+extra-y := head.o vmlinux.lds
+
+obj-y	:= cpu.o entry.o irq.o process.o ptrace.o reset.o setup.o \
+	   sbi.o signal.o syscall_table.o sys_riscv.o time.o traps.o \
+	   stacktrace.o vdso.o vdso/
+
+obj-$(CONFIG_SMP)		+= smpboot.o smp.o
+obj-$(CONFIG_SBI_CONSOLE)	+= sbi-con.o
+obj-$(CONFIG_PCI)		+= pci.o
+
+clean:
diff -Nur linux-4.6.2/arch/riscv/kernel/pci.c linux-4.6.2.riscv/arch/riscv/kernel/pci.c
--- linux-4.6.2/arch/riscv/kernel/pci.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/pci.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,23 @@
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+
+/*
+ * Called after each bus is probed, but before its children are examined
+ */
+void pcibios_fixup_bus(struct pci_bus *bus)
+{
+	/* nothing to do, expected to be removed in the future */
+}
+
+/*
+ * We don't have to worry about legacy ISA devices, so nothing to do here
+ */
+resource_size_t pcibios_align_resource(void *data, const struct resource *res,
+				resource_size_t size, resource_size_t align)
+{
+	return res->start;
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/process.c linux-4.6.2.riscv/arch/riscv/kernel/process.c
--- linux-4.6.2/arch/riscv/kernel/process.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/process.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,106 @@
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/tick.h>
+#include <linux/ptrace.h>
+
+#include <asm/unistd.h>
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+#include <asm/csr.h>
+#include <asm/string.h>
+#include <asm/switch_to.h>
+
+extern asmlinkage void ret_from_fork(void);
+extern asmlinkage void ret_from_kernel_thread(void);
+
+void arch_cpu_idle(void)
+{
+	wait_for_interrupt();
+	local_irq_enable();
+}
+
+void show_regs(struct pt_regs *regs)
+{
+	show_regs_print_info(KERN_DEFAULT);
+
+	printk("sepc: " REG_FMT " ra : " REG_FMT " sp : " REG_FMT "\n",
+		regs->sepc, regs->ra, regs->sp);
+	printk(" gp : " REG_FMT " tp : " REG_FMT " t0 : " REG_FMT "\n",
+		regs->gp, regs->tp, regs->t0);
+	printk(" t1 : " REG_FMT " t2 : " REG_FMT " s0 : " REG_FMT "\n",
+		regs->t1, regs->t2, regs->s0);
+	printk(" s1 : " REG_FMT " a0 : " REG_FMT " a1 : " REG_FMT "\n",
+		regs->s1, regs->a0, regs->a1);
+	printk(" a2 : " REG_FMT " a3 : " REG_FMT " a4 : " REG_FMT "\n",
+		regs->a2, regs->a3, regs->a4);
+	printk(" a5 : " REG_FMT " a6 : " REG_FMT " a7 : " REG_FMT "\n",
+		regs->a5, regs->a6, regs->a7);
+	printk(" s2 : " REG_FMT " s3 : " REG_FMT " s4 : " REG_FMT "\n",
+		regs->s2, regs->s3, regs->s4);
+	printk(" s5 : " REG_FMT " s6 : " REG_FMT " s7 : " REG_FMT "\n",
+		regs->s5, regs->s6, regs->s7);
+	printk(" s8 : " REG_FMT " s9 : " REG_FMT " s10: " REG_FMT "\n",
+		regs->s8, regs->s9, regs->s10);
+	printk(" s11: " REG_FMT " t3 : " REG_FMT " t4 : " REG_FMT "\n",
+		regs->s11, regs->t3, regs->t4);
+	printk(" t5 : " REG_FMT " t6 : " REG_FMT "\n",
+		regs->t5, regs->t6);
+
+	printk("sstatus: " REG_FMT " sbadaddr: " REG_FMT " scause: " REG_FMT "\n",
+		regs->sstatus, regs->sbadaddr, regs->scause);
+}
+
+void start_thread(struct pt_regs *regs, unsigned long pc, 
+	unsigned long sp)
+{
+	regs->sstatus = SR_PIE /* User mode, irqs on */ | SR_FS_INITIAL;
+	regs->sepc = pc;
+	regs->sp = sp;
+	set_fs(USER_DS);
+}
+
+void flush_thread(void)
+{
+	/* Reset FPU context
+	 *	frm: round to nearest, ties to even (IEEE default)
+	 *	fflags: accrued exceptions cleared
+	 */
+	memset(&current->thread.fstate, 0,
+		sizeof(struct user_fpregs_struct));
+}
+
+int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
+{
+	fstate_save(src, task_pt_regs(src));
+	*dst = *src;
+	return 0;
+}
+
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+	unsigned long arg, struct task_struct *p)
+{
+	struct pt_regs *childregs = task_pt_regs(p);
+
+	/* p->thread holds context to be restored by __switch_to() */
+	if (unlikely(p->flags & PF_KTHREAD)) {
+		/* Kernel thread */
+		const register unsigned long gp __asm__ ("gp");
+		memset(childregs, 0, sizeof(struct pt_regs));
+		childregs->gp = gp;
+		childregs->sstatus = SR_PS | SR_PIE; /* Supervisor, irqs on */
+
+		p->thread.ra = (unsigned long)ret_from_kernel_thread;
+		p->thread.s[0] = usp; /* fn */
+		p->thread.s[1] = arg;
+	} else {
+		*childregs = *(current_pt_regs());
+		if (usp) /* User fork */
+			childregs->sp = usp;
+		if (clone_flags & CLONE_SETTLS)
+			childregs->tp = childregs->a5;
+		childregs->a0 = 0; /* Return value of fork() */
+		p->thread.ra = (unsigned long)ret_from_fork;
+	}
+	p->thread.sp = (unsigned long)childregs; /* kernel sp */
+	return 0;
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/ptrace.c linux-4.6.2.riscv/arch/riscv/kernel/ptrace.c
--- linux-4.6.2/arch/riscv/kernel/ptrace.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/ptrace.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,128 @@
+#include <asm/ptrace.h>
+#include <asm/syscall.h>
+#include <asm/thread_info.h>
+#include <linux/ptrace.h>
+#include <linux/elf.h>
+#include <linux/regset.h>
+#include <linux/tracehook.h>
+#include <trace/events/syscalls.h>
+
+enum riscv_regset {
+	REGSET_X,
+};
+
+/*
+ * Get registers from task and ready the result for userspace.
+ */
+static char *getregs(struct task_struct *child, struct pt_regs *uregs)
+{
+	*uregs = *task_pt_regs(child);
+	return (char *)uregs;
+}
+
+/* Put registers back to task. */
+static void putregs(struct task_struct *child, struct pt_regs *uregs)
+{
+	struct pt_regs *regs = task_pt_regs(child);
+	*regs = *uregs;
+}
+
+static int riscv_gpr_get(struct task_struct *target,
+                         const struct user_regset *regset,
+                         unsigned int pos, unsigned int count,
+                         void *kbuf, void __user *ubuf)
+{
+	struct pt_regs regs;
+
+	getregs(target, &regs);
+
+	return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &regs, 0,
+				   sizeof(regs));
+}
+
+static int riscv_gpr_set(struct task_struct *target,
+                         const struct user_regset *regset,
+                         unsigned int pos, unsigned int count,
+                         const void *kbuf, const void __user *ubuf)
+{
+	int ret;
+	struct pt_regs regs;
+
+	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &regs, 0,
+				 sizeof(regs));
+	if (ret)
+		return ret;
+
+	putregs(target, &regs);
+
+	return 0;
+}
+
+
+static const struct user_regset riscv_user_regset[] = {
+	[REGSET_X] = {
+		.core_note_type = NT_PRSTATUS,
+		.n = ELF_NGREG,
+		.size = sizeof(elf_greg_t),
+		.align = sizeof(elf_greg_t),
+		.get = &riscv_gpr_get,
+		.set = &riscv_gpr_set,
+	},
+};
+
+static const struct user_regset_view riscv_user_native_view = {
+	.name = "riscv",
+	.e_machine = EM_RISCV,
+	.regsets = riscv_user_regset,
+	.n = ARRAY_SIZE(riscv_user_regset),
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+	return &riscv_user_native_view;
+}
+
+void ptrace_disable(struct task_struct *child)
+{
+        clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+}
+
+long arch_ptrace(struct task_struct *child, long request,
+                 unsigned long addr, unsigned long data)
+{
+	long ret = -EIO;
+
+	switch (request) {
+	default:
+		ret = ptrace_request(child, request, addr, data);
+		break;
+	}
+
+	return ret;
+}
+
+/* Allows PTRACE_SYSCALL to work.  These are called from entry.S in
+ * {handle,ret_from}_syscall. */
+void do_syscall_trace_enter(struct pt_regs *regs)
+{
+	if (test_thread_flag(TIF_SYSCALL_TRACE)) {
+		if (tracehook_report_syscall_entry(regs))
+			syscall_set_nr(current, regs, -1);
+	}
+
+#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
+	if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
+		trace_sys_enter(regs, syscall_get_nr(current, regs));
+#endif
+}
+
+void do_syscall_trace_exit(struct pt_regs *regs)
+{
+	if (test_thread_flag(TIF_SYSCALL_TRACE))
+		tracehook_report_syscall_exit(regs, 0);
+
+#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
+	if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
+		trace_sys_exit(regs, regs->regs[0]);
+#endif
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/reset.c linux-4.6.2.riscv/arch/riscv/kernel/reset.c
--- linux-4.6.2/arch/riscv/kernel/reset.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/reset.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,19 @@
+#include <linux/reboot.h>
+#include <linux/export.h>
+#include <asm/sbi.h>
+
+void (*pm_power_off)(void) = machine_power_off;
+EXPORT_SYMBOL(pm_power_off);
+
+void machine_restart(char *cmd)
+{
+}
+
+void machine_halt(void)
+{
+}
+
+void machine_power_off(void)
+{
+  sbi_shutdown();
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/sbi-con.c linux-4.6.2.riscv/arch/riscv/kernel/sbi-con.c
--- linux-4.6.2/arch/riscv/kernel/sbi-con.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/sbi-con.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,155 @@
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/tty_driver.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+
+#include <asm/sbi.h>
+
+static DEFINE_SPINLOCK(sbi_tty_port_lock);
+static struct tty_port sbi_tty_port;
+static struct tty_driver *sbi_tty_driver;
+
+irqreturn_t sbi_console_isr(void)
+{
+	int ch = sbi_console_getchar();
+	if (ch < 0)
+		return IRQ_NONE;
+
+	spin_lock(&sbi_tty_port_lock);
+	tty_insert_flip_char(&sbi_tty_port, ch, TTY_NORMAL);
+	tty_flip_buffer_push(&sbi_tty_port);
+	spin_unlock(&sbi_tty_port_lock);
+
+	return IRQ_HANDLED;
+}
+
+static int sbi_tty_open(struct tty_struct *tty, struct file *filp)
+{
+	return 0;
+}
+
+static int sbi_tty_write(struct tty_struct *tty,
+	const unsigned char *buf, int count)
+{
+	const unsigned char *end;
+
+	for (end = buf + count; buf < end; buf++) {
+		sbi_console_putchar(*buf);
+	}
+	return count;
+}
+
+static int sbi_tty_write_room(struct tty_struct *tty)
+{
+	return 1024; /* arbitrary */
+}
+
+static const struct tty_operations sbi_tty_ops = {
+	.open		= sbi_tty_open,
+	.write		= sbi_tty_write,
+	.write_room	= sbi_tty_write_room,
+};
+
+
+static void sbi_console_write(struct console *co, const char *buf, unsigned n)
+{
+	for ( ; n > 0; n--, buf++) {
+		if (*buf == '\n')
+			sbi_console_putchar('\r');
+		sbi_console_putchar(*buf);
+	}
+}
+
+static struct tty_driver *sbi_console_device(struct console *co, int *index)
+{
+	*index = co->index;
+	return sbi_tty_driver;
+}
+
+static int sbi_console_setup(struct console *co, char *options)
+{
+	return co->index != 0 ? -ENODEV : 0;
+}
+
+static struct console sbi_console = {
+	.name	= "sbi_console",
+	.write	= sbi_console_write,
+	.device	= sbi_console_device,
+	.setup	= sbi_console_setup,
+	.flags	= CON_PRINTBUFFER,
+	.index	= -1
+};
+
+static int __init sbi_console_init(void)
+{
+	int ret;
+
+	register_console(&sbi_console);
+
+	sbi_tty_driver = tty_alloc_driver(1,
+		TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV);
+	if (unlikely(IS_ERR(sbi_tty_driver)))
+		return PTR_ERR(sbi_tty_driver);
+
+	sbi_tty_driver->driver_name = "sbi";
+	sbi_tty_driver->name = "ttySBI";
+	sbi_tty_driver->major = TTY_MAJOR;
+	sbi_tty_driver->minor_start = 0;
+	sbi_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
+	sbi_tty_driver->subtype = SERIAL_TYPE_NORMAL;
+	sbi_tty_driver->init_termios = tty_std_termios;
+	tty_set_operations(sbi_tty_driver, &sbi_tty_ops);
+
+	tty_port_init(&sbi_tty_port);
+	tty_port_link_device(&sbi_tty_port, sbi_tty_driver, 0);
+
+	ret = tty_register_driver(sbi_tty_driver);
+	if (unlikely(ret))
+		goto out_tty_put;
+
+	/* Poll the console once, which will trigger future interrupts */
+	sbi_console_isr();
+
+	return ret;
+
+out_tty_put:
+	put_tty_driver(sbi_tty_driver);
+	return ret;
+}
+
+static void __exit sbi_console_exit(void)
+{
+	tty_unregister_driver(sbi_tty_driver);
+	put_tty_driver(sbi_tty_driver);
+}
+
+module_init(sbi_console_init);
+module_exit(sbi_console_exit);
+
+MODULE_DESCRIPTION("RISC-V SBI console driver");
+MODULE_LICENSE("GPL");
+
+#ifdef CONFIG_EARLY_PRINTK
+
+static struct console early_console_dev __initdata = {
+	.name	= "early",
+	.write	= sbi_console_write,
+	.flags	= CON_PRINTBUFFER | CON_BOOT,
+	.index	= -1
+};
+
+static int __init setup_early_printk(char *str)
+{
+	if (early_console == NULL) {
+		early_console = &early_console_dev;
+		register_console(early_console);
+	}
+	return 0;
+}
+
+early_param("earlyprintk", setup_early_printk);
+
+#endif
diff -Nur linux-4.6.2/arch/riscv/kernel/sbi.S linux-4.6.2.riscv/arch/riscv/kernel/sbi.S
--- linux-4.6.2/arch/riscv/kernel/sbi.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/sbi.S	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,15 @@
+.globl sbi_hart_id; sbi_hart_id = -2048
+.globl sbi_num_harts; sbi_num_harts = -2032
+.globl sbi_query_memory; sbi_query_memory = -2016
+.globl sbi_console_putchar; sbi_console_putchar = -2000
+.globl sbi_console_getchar; sbi_console_getchar = -1984
+.globl sbi_send_ipi; sbi_send_ipi = -1952
+.globl sbi_clear_ipi; sbi_clear_ipi = -1936
+.globl sbi_timebase; sbi_timebase = -1920
+.globl sbi_shutdown; sbi_shutdown = -1904
+.globl sbi_set_timer; sbi_set_timer = -1888
+.globl sbi_mask_interrupt; sbi_mask_interrupt = -1872
+.globl sbi_unmask_interrupt; sbi_unmask_interrupt = -1856
+.globl sbi_remote_sfence_vm; sbi_remote_sfence_vm = -1840
+.globl sbi_remote_sfence_vm_range; sbi_remote_sfence_vm_range = -1824
+.globl sbi_remote_fence_i; sbi_remote_fence_i = -1808
diff -Nur linux-4.6.2/arch/riscv/kernel/setup.c linux-4.6.2.riscv/arch/riscv/kernel/setup.c
--- linux-4.6.2/arch/riscv/kernel/setup.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/setup.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,161 @@
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/memblock.h>
+#include <linux/sched.h>
+#include <linux/initrd.h>
+#include <linux/console.h>
+#include <linux/screen_info.h>
+
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/pgtable.h>
+#include <asm/smp.h>
+#include <asm/sbi.h>
+
+#ifdef CONFIG_DUMMY_CONSOLE
+struct screen_info screen_info = {
+	.orig_video_lines	= 30,
+	.orig_video_cols	= 80,
+	.orig_video_mode	= 0,
+	.orig_video_ega_bx	= 0,
+	.orig_video_isVGA	= 1,
+	.orig_video_points	= 8
+};
+#endif
+
+static char __initdata command_line[COMMAND_LINE_SIZE];
+#ifdef CONFIG_CMDLINE_BOOL
+static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
+#endif /* CONFIG_CMDLINE_BOOL */
+
+unsigned long va_pa_offset;
+unsigned long pfn_base;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+static void __init setup_initrd(void)
+{
+	extern char __initramfs_start[];
+	extern unsigned long __initramfs_size;
+	unsigned long size;
+
+	if (__initramfs_size > 0) {
+		initrd_start = (unsigned long)(&__initramfs_start);
+		initrd_end = initrd_start + __initramfs_size;
+	}
+
+	if (initrd_start >= initrd_end) {
+		printk(KERN_INFO "initrd not found or empty");
+		goto disable;
+	}
+	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
+		printk(KERN_ERR "initrd extends beyond end of memory");
+		goto disable;
+	}
+
+	size =  initrd_end - initrd_start;
+	memblock_reserve(__pa(initrd_start), size);
+	initrd_below_start_ok = 1;
+
+	printk(KERN_INFO "Initial ramdisk at: 0x%p (%lu bytes)\n",
+		(void *)(initrd_start), size);
+	return;
+disable:
+	printk(KERN_CONT " - disabling initrd\n");
+	initrd_start = 0;
+	initrd_end = 0;
+}
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+static resource_size_t __initdata mem_size;
+
+/* Parse "mem=nn[KkMmGg]" */
+static int __init early_mem(char *p)
+{
+	if (!p)
+		return -EINVAL;
+	mem_size = memparse(p, &p) & PMD_MASK;
+	if (mem_size == 0)
+		return -EINVAL;
+	return 0;
+}
+early_param("mem", early_mem);
+
+static void __init reserve_boot_page_table(pte_t *table)
+{
+	unsigned long i;
+
+	memblock_reserve(__pa(table), PAGE_SIZE);
+
+	for (i = 0; i < PTRS_PER_PTE; i++) {
+		if (pte_present(table[i]) && !pte_huge(table[i]))
+			reserve_boot_page_table(pfn_to_virt(pte_pfn(table[i])));
+	}
+}
+
+static void __init setup_bootmem(void)
+{
+	unsigned long ret;
+	memory_block_info info;
+
+	ret = sbi_query_memory(0, &info);
+	BUG_ON(ret != 0);
+	BUG_ON((info.base & ~PMD_MASK) != 0);
+	BUG_ON((info.size & ~PMD_MASK) != 0);
+	pr_info("Available physical memory: %ldMB\n", info.size >> 20);
+
+	/* The kernel image is mapped at VA=PAGE_OFFSET and PA=info.base */
+	va_pa_offset = PAGE_OFFSET - info.base;
+	pfn_base = PFN_DOWN(info.base);
+
+	if ((mem_size != 0) && (mem_size < info.size)) {
+		memblock_enforce_memory_limit(mem_size);
+		info.size = mem_size;
+		pr_notice("Physical memory usage limited to %lluMB\n",
+			(unsigned long long)(mem_size >> 20));
+	}
+	set_max_mapnr(PFN_DOWN(info.size));
+	max_low_pfn = PFN_DOWN(info.base + info.size);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	setup_initrd();
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+	memblock_reserve(info.base, __pa(_end) - info.base);
+	reserve_boot_page_table(pfn_to_virt(csr_read(sptbr)));
+	memblock_allow_resize();
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+#ifdef CONFIG_CMDLINE_BOOL
+#ifdef CONFIG_CMDLINE_OVERRIDE
+	strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
+#else
+	if (builtin_cmdline[0] != '\0') {
+		/* Append bootloader command line to built-in */
+		strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
+		strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+		strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
+	}
+#endif /* CONFIG_CMDLINE_OVERRIDE */
+#endif /* CONFIG_CMDLINE_BOOL */
+	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+	*cmdline_p = command_line;
+
+	parse_early_param();
+
+	init_mm.start_code = (unsigned long) _stext;
+	init_mm.end_code   = (unsigned long) _etext;
+	init_mm.end_data   = (unsigned long) _edata;
+	init_mm.brk        = (unsigned long) _end;
+
+	setup_bootmem();
+#ifdef CONFIG_SMP
+	setup_smp();
+#endif
+	paging_init();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+	conswitchp = &dummy_con;
+#endif
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/signal.c linux-4.6.2.riscv/arch/riscv/kernel/signal.c
--- linux-4.6.2/arch/riscv/kernel/signal.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/signal.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,236 @@
+#include <linux/signal.h>
+#include <linux/uaccess.h>
+#include <linux/syscalls.h>
+#include <linux/tracehook.h>
+#include <linux/linkage.h>
+
+#include <asm/ucontext.h>
+#include <asm/vdso.h>
+#include <asm/switch_to.h>
+#include <asm/csr.h>
+
+#define DEBUG_SIG 0
+
+struct rt_sigframe {
+	struct siginfo info;
+	struct ucontext uc;
+};
+
+static long restore_sigcontext(struct pt_regs *regs,
+	struct sigcontext __user *sc)
+{
+	struct task_struct *task = current;
+	long err;
+	/* sc_regs is structured the same as the start of pt_regs */
+	err = __copy_from_user(regs, &sc->sc_regs, sizeof(sc->sc_regs));
+	err |= __copy_from_user(&task->thread.fstate, &sc->sc_fpregs,
+		sizeof(sc->sc_fpregs));
+	if (likely(!err))
+		fstate_restore(task, regs);
+	return err;
+}
+
+SYSCALL_DEFINE0(rt_sigreturn)
+{
+	struct pt_regs *regs = current_pt_regs();
+	struct rt_sigframe __user *frame;
+	struct task_struct *task;
+	sigset_t set;
+
+	/* Always make any pending restarted system calls return -EINTR */
+	current->restart_block.fn = do_no_restart_syscall;
+
+	frame = (struct rt_sigframe __user *)regs->sp;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+
+	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+		goto badframe;
+
+	set_current_blocked(&set);
+
+	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
+		goto badframe;
+
+	if (restore_altstack(&frame->uc.uc_stack))
+		goto badframe;
+
+	return regs->a0;
+
+badframe:
+	task = current;
+	if (show_unhandled_signals) {
+		pr_info_ratelimited("%s[%d]: bad frame in %s: "
+			"frame=%p pc=%p sp=%p\n",
+			task->comm, task_pid_nr(task), __func__,
+			frame, (void *)regs->sepc, (void *)regs->sp);
+	}
+	force_sig(SIGSEGV, task);
+	return 0;
+}
+
+static long setup_sigcontext(struct sigcontext __user *sc,
+	struct pt_regs *regs)
+{
+	struct task_struct *task = current;
+	long err;
+	/* sc_regs is structured the same as the start of pt_regs */
+	err = __copy_to_user(&sc->sc_regs, regs, sizeof(sc->sc_regs));
+	fstate_save(task, regs);
+	err |= __copy_to_user(&sc->sc_fpregs, &task->thread.fstate,
+		sizeof(sc->sc_fpregs));
+	return err;
+}
+
+static inline void __user *get_sigframe(struct ksignal *ksig,
+	struct pt_regs *regs, size_t framesize)
+{
+	unsigned long sp;
+	/* Default to using normal stack */
+	sp = regs->sp;
+
+	/*
+	 * If we are on the alternate signal stack and would overflow it, don't.
+	 * Return an always-bogus address instead so we will die with SIGSEGV.
+	 */
+	if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
+		return (void __user __force *)(-1UL);
+
+	/* This is the X/Open sanctioned signal stack switching. */
+	sp = sigsp(sp, ksig) - framesize;
+
+	/* Align the stack frame. */
+	sp &= ~0xfUL;
+
+	return (void __user *)sp;
+}
+
+
+static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
+	struct pt_regs *regs)
+{
+	struct rt_sigframe __user *frame;
+	long err = 0;
+
+	frame = get_sigframe(ksig, regs, sizeof(*frame));
+	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+		return -EFAULT;
+
+	err |= copy_siginfo_to_user(&frame->info, &ksig->info);
+
+	/* Create the ucontext. */
+	err |= __put_user(0, &frame->uc.uc_flags);
+	err |= __put_user(NULL, &frame->uc.uc_link);
+	err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
+	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
+	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+	if (err)
+		return -EFAULT;
+
+	/* Set up to return from userspace. */
+	regs->ra = (unsigned long)VDSO_SYMBOL(
+		current->mm->context.vdso, rt_sigreturn);
+
+	/*
+	 * Set up registers for signal handler.
+	 * Registers that we don't modify keep the value they had from
+	 * user-space at the time we took the signal.
+	 * We always pass siginfo and mcontext, regardless of SA_SIGINFO,
+	 * since some things rely on this (e.g. glibc's debug/segfault.c).
+	 */
+	regs->sepc = (unsigned long)ksig->ka.sa.sa_handler;
+	regs->sp = (unsigned long)frame;
+	regs->a0 = ksig->sig;                     /* a0: signal number */
+	regs->a1 = (unsigned long)(&frame->info); /* a1: siginfo pointer */
+	regs->a2 = (unsigned long)(&frame->uc);   /* a2: ucontext pointer */
+
+#if DEBUG_SIG
+	pr_info("SIG deliver (%s:%d): sig=%d pc=%p ra=%p sp=%p\n",
+		current->comm, task_pid_nr(current), ksig->sig,
+		(void *)regs->sepc, (void *)regs->ra, frame);
+#endif
+
+	return 0;
+}
+
+static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
+{
+	sigset_t *oldset = sigmask_to_save();
+	int ret;
+
+	/* Are we from a system call? */
+	if (regs->scause == EXC_SYSCALL) {
+		/* If so, check system call restarting.. */
+		switch (regs->a0) {
+		case -ERESTART_RESTARTBLOCK:
+		case -ERESTARTNOHAND:
+			regs->a0 = -EINTR;
+			break;
+
+		case -ERESTARTSYS:
+			if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
+				regs->a0 = -EINTR;
+				break;
+			}
+			/* fallthrough */
+		case -ERESTARTNOINTR:
+			regs->sepc -= 0x4;
+			break;
+		}
+	}
+
+	/* Set up the stack frame */
+	ret = setup_rt_frame(ksig, oldset, regs);
+
+	signal_setup_done(ret, ksig, 0);
+}
+
+static void do_signal(struct pt_regs *regs)
+{
+	struct ksignal ksig;
+
+	if (get_signal(&ksig)) {
+		/* Actually deliver the signal */
+		handle_signal(&ksig, regs);
+		return;
+	}
+
+	/* Did we come from a system call? */
+	if (regs->scause == EXC_SYSCALL) {
+		/* Restart the system call - no handlers present */
+		switch (regs->a0) {
+		case -ERESTARTNOHAND:
+		case -ERESTARTSYS:
+		case -ERESTARTNOINTR:
+			regs->sepc -= 0x4;
+			break;
+		case -ERESTART_RESTARTBLOCK:
+			regs->a7 = __NR_restart_syscall;
+			regs->sepc -= 0x4;
+			break;
+		}
+	}
+
+	/* If there is no signal to deliver, we just put the saved
+	   sigmask back. */
+	restore_saved_sigmask();
+}
+
+/*
+ * notification of userspace execution resumption
+ * - triggered by the _TIF_WORK_MASK flags
+ */
+asmlinkage void do_notify_resume(struct pt_regs *regs,
+	unsigned long thread_info_flags)
+{
+	/* Handle pending signal delivery */
+	if (thread_info_flags & _TIF_SIGPENDING) {
+		do_signal(regs);
+	}
+
+	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
+		clear_thread_flag(TIF_NOTIFY_RESUME);
+		tracehook_notify_resume(regs);
+	}
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/smpboot.c linux-4.6.2.riscv/arch/riscv/kernel/smpboot.c
--- linux-4.6.2/arch/riscv/kernel/smpboot.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/smpboot.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,72 @@
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <linux/percpu.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <asm/mmu_context.h>
+#include <asm/tlbflush.h>
+#include <asm/sections.h>
+#include <asm/sbi.h>
+
+void *__cpu_up_stack_pointer[NR_CPUS];
+
+void __init smp_prepare_boot_cpu(void)
+{
+}
+
+void __init smp_prepare_cpus(unsigned int max_cpus)
+{
+}
+
+void __init setup_smp(void)
+{
+	int i, num_cpus = sbi_num_harts();
+
+	for (i = 0; i < min(num_cpus, NR_CPUS); i++) {
+		set_cpu_possible(i, true);
+		set_cpu_present(i, true);
+	}
+}
+
+int __cpu_up(unsigned int cpu, struct task_struct *tidle)
+{
+	/* Signal cpu to start */
+	__cpu_up_stack_pointer[cpu] = task_stack_page(tidle) + THREAD_SIZE;
+
+	while (!cpu_online(cpu))
+		;
+	
+	return 0;
+}
+
+void __init smp_cpus_done(unsigned int max_cpus)
+{
+}
+
+/*
+ * C entry point for a secondary processor.
+ */
+asmlinkage void __init smp_callin(void)
+{
+	struct mm_struct *mm = &init_mm;
+
+	/* All kernel threads share the same mm context.  */
+	atomic_inc(&mm->mm_count);
+	current->active_mm = mm;
+
+	trap_init();
+	init_clockevent();
+	notify_cpu_starting(smp_processor_id());
+	set_cpu_online(smp_processor_id(), 1);
+	local_flush_tlb_all();
+	local_irq_enable();
+	preempt_disable();
+	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/smp.c linux-4.6.2.riscv/arch/riscv/kernel/smp.c
--- linux-4.6.2/arch/riscv/kernel/smp.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/smp.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,85 @@
+#include <linux/interrupt.h>
+#include <linux/smp.h>
+#include <linux/sched.h>
+
+#include <asm/sbi.h>
+#include <asm/tlbflush.h>
+#include <asm/cacheflush.h>
+
+/* A collection of single bit ipi messages.  */
+static struct {
+	unsigned long bits ____cacheline_aligned;
+} ipi_data[NR_CPUS] __cacheline_aligned;
+
+enum ipi_message_type {
+	IPI_RESCHEDULE,
+	IPI_CALL_FUNC,
+	IPI_MAX
+};
+
+irqreturn_t handle_ipi(void)
+{
+	unsigned long *pending_ipis = &ipi_data[smp_processor_id()].bits;
+	unsigned long ops;
+
+	/* Clear pending IPI */
+	if (!sbi_clear_ipi())
+		return IRQ_NONE;
+
+	mb();	/* Order interrupt and bit testing. */
+	while ((ops = xchg(pending_ipis, 0)) != 0) {
+		mb();	/* Order bit clearing and data access. */
+
+		if (ops & (1 << IPI_RESCHEDULE))
+			scheduler_ipi();
+
+		if (ops & (1 << IPI_CALL_FUNC))
+			generic_smp_call_function_interrupt();
+
+		BUG_ON((ops >> IPI_MAX) != 0);
+
+		mb();	/* Order data access and bit testing. */
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void
+send_ipi_message(const struct cpumask *to_whom, enum ipi_message_type operation)
+{
+	int i;
+
+	mb();
+	for_each_cpu(i, to_whom)
+		set_bit(operation, &ipi_data[i].bits);
+
+	mb();
+	for_each_cpu(i, to_whom)
+		sbi_send_ipi(i);
+}
+
+void arch_send_call_function_ipi_mask(struct cpumask *mask)
+{
+	send_ipi_message(mask, IPI_CALL_FUNC);
+}
+
+void arch_send_call_function_single_ipi(int cpu)
+{
+	send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC);
+}
+
+static void ipi_stop(void *unused)
+{
+	while (1)
+		wait_for_interrupt();
+}
+
+void smp_send_stop(void)
+{
+	on_each_cpu(ipi_stop, NULL, 1);
+}
+
+void smp_send_reschedule(int cpu)
+{
+	send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE);
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/stacktrace.c linux-4.6.2.riscv/arch/riscv/kernel/stacktrace.c
--- linux-4.6.2/arch/riscv/kernel/stacktrace.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/stacktrace.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,163 @@
+#include <linux/export.h>
+#include <linux/kallsyms.h>
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+
+#ifdef CONFIG_FRAME_POINTER
+
+struct stackframe {
+	unsigned long fp;
+	unsigned long ra;
+};
+
+static void notrace walk_stackframe(struct task_struct *task,
+	struct pt_regs *regs, bool (*fn)(unsigned long, void *), void *arg)
+{
+	unsigned long fp, sp, pc;
+
+	if (regs) {
+		fp = GET_FP(regs);
+		sp = GET_USP(regs);
+		pc = GET_IP(regs);
+	} else if (task == NULL || task == current) {
+		const register unsigned long current_sp __asm__ ("sp");
+		fp = (unsigned long)__builtin_frame_address(0);
+		sp = current_sp;
+		pc = (unsigned long)walk_stackframe;
+	} else {
+		/* task blocked in __switch_to */
+		fp = task->thread.s[0];
+		sp = task->thread.sp;
+		pc = task->thread.ra;
+	}
+
+	for (;;) {
+		unsigned long low, high;
+		struct stackframe *frame;
+
+		if (unlikely(!__kernel_text_address(pc) || fn(pc, arg)))
+			break;
+
+		/* Validate frame pointer */
+		low = sp + sizeof(struct stackframe);
+		high = ALIGN(sp, THREAD_SIZE);
+		if (unlikely(fp < low || fp > high || fp & 0x7))
+			break;
+		/* Unwind stack frame */
+		frame = (struct stackframe *)fp - 1;
+		sp = fp;
+		fp = frame->fp;
+		pc = frame->ra - 0x4;
+	}
+}
+
+#else /* !CONFIG_FRAME_POINTER */
+
+static void notrace walk_stackframe(struct task_struct *task,
+	struct pt_regs *regs, bool (*fn)(unsigned long, void *), void *arg)
+{
+	unsigned long sp, pc;
+	unsigned long *ksp;
+
+	if (regs) {
+		sp = GET_USP(regs);
+		pc = GET_IP(regs);
+	} else if (task == NULL || task == current) {
+		const register unsigned long current_sp __asm__ ("sp");
+		sp = current_sp;
+		pc = (unsigned long)walk_stackframe;
+	} else {
+		/* task blocked in __switch_to */
+		sp = task->thread.sp;
+		pc = task->thread.ra;
+	}
+
+	if (unlikely(sp & 0x7))
+		return;
+
+	ksp = (unsigned long *)sp;
+	while (!kstack_end(ksp)) {
+		if (__kernel_text_address(pc) && unlikely(fn(pc, arg))) {
+			break;
+		}
+		pc = (*ksp++) - 0x4;
+	}
+}
+
+#endif /* CONFIG_FRAME_POINTER */
+
+
+static bool print_trace_address(unsigned long pc, void *arg)
+{
+	print_ip_sym(pc);
+	return false;
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+	printk("Call Trace:\n");
+	walk_stackframe(task, NULL, print_trace_address, NULL);
+}
+
+
+static bool save_wchan(unsigned long pc, void *arg)
+{
+	if (!in_sched_functions(pc)) {
+		unsigned long *p = arg;
+		*p = pc;
+		return true;
+	}
+	return false;
+}
+
+unsigned long get_wchan(struct task_struct *task)
+{
+	unsigned long pc;
+	pc = 0;
+	if (likely(task && task != current && task->state != TASK_RUNNING)) {
+		walk_stackframe(task, NULL, save_wchan, &pc);
+	}
+	return pc;
+}
+
+
+#ifdef CONFIG_STACKTRACE
+
+static bool __save_trace(unsigned long pc, void *arg, bool nosched)
+{
+	struct stack_trace *trace = arg;
+
+	if (unlikely(nosched && in_sched_functions(pc)))
+		return false;
+	if (unlikely(trace->skip > 0)) {
+		trace->skip--;
+		return false;
+	}
+
+	trace->entries[trace->nr_entries++] = pc;
+	return (trace->nr_entries >= trace->max_entries);
+}
+
+static bool save_trace(unsigned long pc, void *arg)
+{
+	return __save_trace(pc, arg, false);
+}
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
+{
+	walk_stackframe(tsk, NULL, save_trace, trace);
+	if (trace->nr_entries < trace->max_entries)
+		trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
+
+void save_stack_trace(struct stack_trace *trace)
+{
+	save_stack_trace_tsk(NULL, trace);
+}
+EXPORT_SYMBOL_GPL(save_stack_trace);
+
+#endif /* CONFIG_STACKTRACE */
diff -Nur linux-4.6.2/arch/riscv/kernel/syscall_table.c linux-4.6.2.riscv/arch/riscv/kernel/syscall_table.c
--- linux-4.6.2/arch/riscv/kernel/syscall_table.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/syscall_table.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,10 @@
+#include <linux/syscalls.h>
+
+#include <asm/syscalls.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+void *sys_call_table[__NR_syscalls] = {
+#include <asm/unistd.h>
+};
diff -Nur linux-4.6.2/arch/riscv/kernel/sys_riscv.c linux-4.6.2.riscv/arch/riscv/kernel/sys_riscv.c
--- linux-4.6.2/arch/riscv/kernel/sys_riscv.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/sys_riscv.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,70 @@
+#include <linux/syscalls.h>
+#include <asm/unistd.h>
+
+SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
+	unsigned long, prot, unsigned long, flags,
+	unsigned long, fd, off_t, offset)
+{
+	if (unlikely(offset & (~PAGE_MASK)))
+		return -EINVAL;
+	return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+}
+
+#ifndef CONFIG_64BIT
+SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
+	unsigned long, prot, unsigned long, flags,
+	unsigned long, fd, off_t, offset)
+{
+	/* Note that the shift for mmap2 is constant (12),
+	   regardless of PAGE_SIZE */
+	if (unlikely(offset & (~PAGE_MASK >> 12)))
+		return -EINVAL;
+	return sys_mmap_pgoff(addr, len, prot, flags, fd,
+		offset >> (PAGE_SHIFT - 12));
+}
+#endif /* !CONFIG_64BIT */
+
+#ifdef CONFIG_RV_SYSRISCV_ATOMIC
+SYSCALL_DEFINE4(sysriscv, unsigned long, cmd, unsigned long, arg1,
+	unsigned long, arg2, unsigned long, arg3)
+{
+	unsigned long flags;
+	unsigned long prev;
+	unsigned int *ptr;
+	unsigned int err;
+
+	switch (cmd) {
+	case RISCV_ATOMIC_CMPXCHG:
+		ptr = (unsigned int *)arg1;
+		if (!access_ok(VERIFY_WRITE, ptr, sizeof(unsigned int)))
+			return -EFAULT;
+
+		preempt_disable();
+		raw_local_irq_save(flags);
+		err = __get_user(prev, ptr);
+		if (likely(!err && prev == arg2))
+			err = __put_user(arg3, ptr);
+		raw_local_irq_restore(flags);
+		preempt_enable();
+
+		return unlikely(err) ? err : prev;
+
+	case RISCV_ATOMIC_CMPXCHG64:
+		ptr = (unsigned int *)arg1;
+		if (!access_ok(VERIFY_WRITE, ptr, sizeof(unsigned long)))
+			return -EFAULT;
+
+		preempt_disable();
+		raw_local_irq_save(flags);
+		err = __get_user(prev, ptr);
+		if (likely(!err && prev == arg2))
+			err = __put_user(arg3, ptr);
+		raw_local_irq_restore(flags);
+		preempt_enable();
+
+		return unlikely(err) ? err : prev;
+	}
+
+	return -EINVAL;
+}
+#endif /* CONFIG_RV_SYSRISCV_ATOMIC */
diff -Nur linux-4.6.2/arch/riscv/kernel/time.c linux-4.6.2.riscv/arch/riscv/kernel/time.c
--- linux-4.6.2/arch/riscv/kernel/time.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/time.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,88 @@
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+
+#include <asm/irq.h>
+#include <asm/csr.h>
+#include <asm/sbi.h>
+#include <asm/delay.h>
+
+unsigned long timebase;
+
+static DEFINE_PER_CPU(struct clock_event_device, clock_event);
+
+static int riscv_timer_set_next_event(unsigned long delta,
+	struct clock_event_device *evdev)
+{
+	sbi_set_timer(get_cycles() + delta);
+	return 0;
+}
+
+static int riscv_timer_set_oneshot(struct clock_event_device *evt)
+{
+	/* no-op; only one mode */
+	return 0;
+}
+
+static int riscv_timer_set_shutdown(struct clock_event_device *evt)
+{
+	/* can't stop the clock! */
+	return 0;
+}
+
+static cycle_t riscv_rdtime(struct clocksource *cs)
+{
+	return get_cycles();
+}
+
+static struct clocksource riscv_clocksource = {
+	.name = "riscv_clocksource",
+	.rating = 300,
+	.read = riscv_rdtime,
+#ifdef CONFIG_64BITS
+	.mask = CLOCKSOURCE_MASK(64),
+#else
+	.mask = CLOCKSOURCE_MASK(32),
+#endif /* CONFIG_64BITS */
+	.flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void riscv_timer_interrupt(void)
+{
+	int cpu = smp_processor_id();
+	struct clock_event_device *evdev = &per_cpu(clock_event, cpu);
+	evdev->event_handler(evdev);
+}
+
+void __init init_clockevent(void)
+{
+	int cpu = smp_processor_id();
+	struct clock_event_device *ce = &per_cpu(clock_event, cpu);
+
+	*ce = (struct clock_event_device){
+		.name = "riscv_timer_clockevent",
+		.features = CLOCK_EVT_FEAT_ONESHOT,
+		.rating = 300,
+		.cpumask = cpumask_of(cpu),
+		.set_next_event = riscv_timer_set_next_event,
+		.set_state_oneshot  = riscv_timer_set_oneshot,
+		.set_state_shutdown = riscv_timer_set_shutdown,
+	};
+
+	clockevents_config_and_register(ce, sbi_timebase(), 100, 0x7fffffff);
+}
+
+void __init time_init(void)
+{
+	timebase = sbi_timebase();
+	lpj_fine = timebase;
+	do_div(lpj_fine, HZ);
+
+	clocksource_register_hz(&riscv_clocksource, timebase);
+	init_clockevent();
+
+	/* Enable timer interrupts. */
+	csr_set(sie, SIE_STIE);
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/traps.c linux-4.6.2.riscv/arch/riscv/kernel/traps.c
--- linux-4.6.2/arch/riscv/kernel/traps.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/traps.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,146 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/kdebug.h>
+#include <linux/uaccess.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+#include <asm/csr.h>
+
+int show_unhandled_signals = 1;
+
+extern asmlinkage void handle_exception(void);
+
+static DEFINE_SPINLOCK(die_lock);
+
+void die(struct pt_regs *regs, const char *str)
+{
+	static int die_counter;
+	int ret;
+
+	oops_enter();
+
+	spin_lock_irq(&die_lock);
+	console_verbose();
+	bust_spinlocks(1);
+
+	pr_emerg("%s [#%d]\n", str, ++die_counter);
+	print_modules();
+	show_regs(regs);
+
+	ret = notify_die(DIE_OOPS, str, regs, 0, regs->scause, SIGSEGV);
+
+	bust_spinlocks(0);
+	add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
+	spin_unlock_irq(&die_lock);
+	oops_exit();
+
+	if (in_interrupt())
+		panic("Fatal exception in interrupt");
+	if (panic_on_oops)
+		panic("Fatal exception");
+	if (ret != NOTIFY_STOP)
+		do_exit(SIGSEGV);
+}
+
+static inline void do_trap_siginfo(int signo, int code,
+	unsigned long addr, struct task_struct *tsk)
+{
+	siginfo_t info;
+
+	info.si_signo = signo;
+	info.si_errno = 0;
+	info.si_code = code;
+	info.si_addr = (void __user *)addr;
+	force_sig_info(signo, &info, tsk);
+}
+
+void do_trap(struct pt_regs *regs, int signo, int code,
+	unsigned long addr, struct task_struct *tsk)
+{
+	if (show_unhandled_signals && unhandled_signal(tsk, signo)
+	    && printk_ratelimit()) {
+		pr_info("%s[%d]: unhandled signal %d code 0x%x at 0x" REG_FMT,
+			tsk->comm, task_pid_nr(tsk), signo, code, addr);
+		print_vma_addr(KERN_CONT " in ", GET_IP(regs));
+		pr_cont("\n");
+		show_regs(regs);
+	}
+
+	do_trap_siginfo(signo, code, addr, tsk);
+}
+
+static void do_trap_error(struct pt_regs *regs, int signo, int code,
+	unsigned long addr, const char *str)
+{
+	if (user_mode(regs)) {
+		do_trap(regs, signo, code, addr, current);
+	} else {
+		if (!fixup_exception(regs))
+			die(regs, str);
+	}
+}
+
+#define DO_ERROR_INFO(name, signo, code, str)				\
+asmlinkage void name(struct pt_regs *regs)				\
+{									\
+	do_trap_error(regs, signo, code, regs->sepc, "Oops - " str);	\
+}
+
+DO_ERROR_INFO(do_trap_unknown,
+	SIGILL, ILL_ILLTRP, "unknown exception");
+DO_ERROR_INFO(do_trap_amo_misaligned,
+	SIGBUS, BUS_ADRALN, "AMO address misaligned");
+DO_ERROR_INFO(do_trap_insn_misaligned,
+	SIGBUS, BUS_ADRALN, "instruction address misaligned");
+DO_ERROR_INFO(do_trap_insn_illegal,
+	SIGILL, ILL_ILLOPC, "illegal instruction");
+
+asmlinkage void do_trap_break(struct pt_regs *regs)
+{
+#ifdef CONFIG_GENERIC_BUG
+	if (!user_mode(regs)) {
+		enum bug_trap_type type;
+
+		type = report_bug(regs->sepc, regs);
+		switch (type) {
+		case BUG_TRAP_TYPE_NONE:
+			break;
+		case BUG_TRAP_TYPE_WARN:
+			regs->sepc += sizeof(bug_insn_t);
+			return;
+		case BUG_TRAP_TYPE_BUG:
+			die(regs, "Kernel BUG");
+		}
+	}
+#endif /* CONFIG_GENERIC_BUG */
+
+	do_trap_siginfo(SIGTRAP, TRAP_BRKPT, regs->sepc, current);
+	regs->sepc += 0x4;
+}
+
+#ifdef CONFIG_GENERIC_BUG
+int is_valid_bugaddr(unsigned long pc)
+{
+	bug_insn_t insn;
+
+	if (pc < PAGE_OFFSET)
+		return 0;
+	if (probe_kernel_address((bug_insn_t __user *)pc, insn))
+		return 0;
+	return (insn == __BUG_INSN);
+}
+#endif /* CONFIG_GENERIC_BUG */
+
+void __init trap_init(void)
+{
+	/* Set sup0 scratch register to 0, indicating to exception vector
+	   that we are presently executing in the kernel */
+	csr_write(sscratch, 0);
+	/* Set the exception vector address */
+	csr_write(stvec, &handle_exception);
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/vdso/.gitignore linux-4.6.2.riscv/arch/riscv/kernel/vdso/.gitignore
--- linux-4.6.2/arch/riscv/kernel/vdso/.gitignore	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/vdso/.gitignore	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1 @@
+vdso.lds
diff -Nur linux-4.6.2/arch/riscv/kernel/vdso/Makefile linux-4.6.2.riscv/arch/riscv/kernel/vdso/Makefile
--- linux-4.6.2/arch/riscv/kernel/vdso/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/vdso/Makefile	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,61 @@
+# Derived from arch/{arm64,tile}/kernel/vdso/Makefile
+
+obj-vdso := sigreturn.o
+
+# Build rules
+targets := $(obj-vdso) vdso.so vdso.so.dbg
+obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
+
+#ccflags-y := -shared -fno-common -fno-builtin
+#ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \
+		$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
+
+CFLAGS_vdso.so = $(c_flags)
+CFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \
+	$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
+CFLAGS_vdso_syms.o = -r
+
+obj-y += vdso.o
+
+# We also create a special relocatable object that should mirror the symbol
+# table and layout of the linked DSO.  With ld -R we can then refer to
+# these symbols in the kernel code rather than hand-coded addresses.
+extra-y += vdso.lds vdso-syms.o
+$(obj)/built-in.o: $(obj)/vdso-syms.o
+$(obj)/built-in.o: ld_flags += -R $(obj)/vdso-syms.o
+
+CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
+
+# Force dependency
+$(obj)/vdso.o : $(obj)/vdso.so
+
+# Link rule for the *.so file; *.lds must be first
+$(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso)
+	$(call if_changed,vdsold)
+$(obj)/vdso-syms.o: $(src)/vdso.lds $(obj-vdso)
+	$(call if_changed,vdsold)
+
+# Strip rule for the *.so file
+$(obj)/%.so: OBJCOPYFLAGS := -S
+$(obj)/%.so: $(obj)/%.so.dbg FORCE
+	$(call if_changed,objcopy)
+
+# Assembly rules for the *.S files
+$(obj-vdso): %.o: %.S
+	$(call if_changed_dep,vdsoas)
+
+# Actual build commands
+quiet_cmd_vdsold = VDSOLD  $@
+      cmd_vdsold = $(CC) $(c_flags) -nostdlib $(CFLAGS_$(@F)) -Wl,-n -Wl,-T $^ -o $@
+quiet_cmd_vdsoas = VDSOAS  $@
+      cmd_vdsoas = $(CC) $(a_flags) -c -o $@ $<
+
+# Install commands for the unstripped file
+quiet_cmd_vdso_install = INSTALL $@
+      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
+
+vdso.so: $(obj)/vdso.so.dbg
+	@mkdir -p $(MODLIB)/vdso
+	$(call cmd,vdso_install)
+
+vdso_install: vdso.so
diff -Nur linux-4.6.2/arch/riscv/kernel/vdso/sigreturn.S linux-4.6.2.riscv/arch/riscv/kernel/vdso/sigreturn.S
--- linux-4.6.2/arch/riscv/kernel/vdso/sigreturn.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/vdso/sigreturn.S	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,11 @@
+#include <linux/linkage.h>
+#include <asm/unistd.h>
+
+	.text
+ENTRY(__vdso_rt_sigreturn)
+	.cfi_startproc
+	.cfi_signal_frame
+	li a7, __NR_rt_sigreturn
+	scall
+	.cfi_endproc
+ENDPROC(__vdso_rt_sigreturn)
diff -Nur linux-4.6.2/arch/riscv/kernel/vdso/vdso.lds.S linux-4.6.2.riscv/arch/riscv/kernel/vdso/vdso.lds.S
--- linux-4.6.2/arch/riscv/kernel/vdso/vdso.lds.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/vdso/vdso.lds.S	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,63 @@
+OUTPUT_ARCH(riscv)
+
+SECTIONS
+{
+	. = SIZEOF_HEADERS;
+
+	.hash		: { *(.hash) }			:text
+	.gnu.hash	: { *(.gnu.hash) }
+	.dynsym		: { *(.dynsym) }
+	.dynstr		: { *(.dynstr) }
+	.gnu.version	: { *(.gnu.version) }
+	.gnu.version_d	: { *(.gnu.version_d) }
+	.gnu.version_r	: { *(.gnu.version_r) }
+
+	.note		: { *(.note.*) }		:text	:note
+	.dynamic	: { *(.dynamic) }		:text	:dynamic
+
+	.eh_frame_hdr	: { *(.eh_frame_hdr) }		:text	:eh_frame_hdr
+	.eh_frame	: { KEEP (*(.eh_frame)) }	:text
+
+	.rodata		: { *(.rodata .rodata.* .gnu.linkonce.r.*) }
+
+	/*
+	 * This linker script is used both with -r and with -shared.
+	 * For the layouts to match, we need to skip more than enough
+	 * space for the dynamic symbol table, etc. If this amount is
+	 * insufficient, ld -shared will error; simply increase it here.
+	 */
+	. = 0x800;
+	.text		: { *(.text .text.*) }		:text
+
+	.data		: {
+		*(.got.plt) *(.got)
+		*(.data .data.* .gnu.linkonce.d.*)
+		*(.dynbss)
+		*(.bss .bss.* .gnu.linkonce.b.*)
+	}
+}
+
+/*
+ * We must supply the ELF program headers explicitly to get just one
+ * PT_LOAD segment, and set the flags explicitly to make segments read-only.
+ */
+PHDRS
+{
+	text		PT_LOAD		FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
+	dynamic		PT_DYNAMIC	FLAGS(4);		/* PF_R */
+	note		PT_NOTE		FLAGS(4);		/* PF_R */
+	eh_frame_hdr	PT_GNU_EH_FRAME;
+}
+
+/*
+ * This controls what symbols we export from the DSO.
+ */
+VERSION
+{
+	LINUX_2.6 {
+	global:
+		__vdso_rt_sigreturn;
+	local: *;
+	};
+}
+
diff -Nur linux-4.6.2/arch/riscv/kernel/vdso/vdso.S linux-4.6.2.riscv/arch/riscv/kernel/vdso/vdso.S
--- linux-4.6.2/arch/riscv/kernel/vdso/vdso.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/vdso/vdso.S	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,14 @@
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/page.h>
+
+	__PAGE_ALIGNED_DATA
+
+	.globl vdso_start, vdso_end
+	.balign PAGE_SIZE
+vdso_start:
+	.incbin "arch/riscv/kernel/vdso/vdso.so"
+	.balign PAGE_SIZE
+vdso_end:
+
+	.previous
diff -Nur linux-4.6.2/arch/riscv/kernel/vdso.c linux-4.6.2.riscv/arch/riscv/kernel/vdso.c
--- linux-4.6.2/arch/riscv/kernel/vdso.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/vdso.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,106 @@
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/binfmts.h>
+#include <linux/err.h>
+
+#include <asm/vdso.h>
+
+extern char vdso_start[], vdso_end[];
+
+static unsigned int vdso_pages;
+static struct page **vdso_pagelist;
+
+/*
+ * The vDSO data page.
+ */
+static union {
+	struct vdso_data	data;
+	u8			page[PAGE_SIZE];
+} vdso_data_store __page_aligned_data;
+struct vdso_data *vdso_data = &vdso_data_store.data;
+
+static int __init vdso_init(void)
+{
+	unsigned int i;
+
+	vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
+	vdso_pagelist = kzalloc(sizeof(struct page *) * (vdso_pages + 1), GFP_KERNEL);
+	if (unlikely(vdso_pagelist == NULL)) {
+		pr_err("vdso: pagelist allocation failed\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < vdso_pages; i++) {
+		struct page *pg;
+		pg = virt_to_page(vdso_start + (i << PAGE_SHIFT));
+		ClearPageReserved(pg);
+		vdso_pagelist[i] = pg;
+	}
+	vdso_pagelist[i] = virt_to_page(vdso_data);
+
+	return 0;
+}
+arch_initcall(vdso_init);
+
+int arch_setup_additional_pages(struct linux_binprm *bprm,
+	int uses_interp)
+{
+	struct mm_struct *mm = current->mm;
+	unsigned long vdso_base, vdso_len;
+	int ret;
+
+	vdso_len = (vdso_pages + 1) << PAGE_SHIFT;
+
+	down_write(&mm->mmap_sem);
+	vdso_base = get_unmapped_area(NULL, 0, vdso_len, 0, 0);
+	if (unlikely(IS_ERR_VALUE(vdso_base))) {
+		ret = vdso_base;
+		goto end;
+	}
+
+	/*
+	 * Put vDSO base into mm struct. We need to do this before calling
+	 * install_special_mapping or the perf counter mmap tracking code
+	 * will fail to recognise it as a vDSO (since arch_vma_name fails).
+	 */
+	mm->context.vdso = (void *)vdso_base;
+
+	ret = install_special_mapping(mm, vdso_base, vdso_len,
+		(VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC),
+		vdso_pagelist);
+
+	if (unlikely(ret)) {
+		mm->context.vdso = NULL;
+	}
+
+end:
+	up_write(&mm->mmap_sem);
+	return ret;
+}
+
+const char *arch_vma_name(struct vm_area_struct *vma)
+{
+	if (vma->vm_mm && (vma->vm_start == (long)vma->vm_mm->context.vdso)) {
+		return "[vdso]";
+	}
+	return NULL;
+}
+
+/*
+ * Function stubs to prevent linker errors when AT_SYSINFO_EHDR is defined
+ */
+
+int in_gate_area_no_mm(unsigned long addr)
+{
+	return 0;
+}
+
+int in_gate_area(struct mm_struct *mm, unsigned long addr)
+{
+	return 0;
+}
+
+struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
+{
+	return NULL;
+}
diff -Nur linux-4.6.2/arch/riscv/kernel/vmlinux.lds.S linux-4.6.2.riscv/arch/riscv/kernel/vmlinux.lds.S
--- linux-4.6.2/arch/riscv/kernel/vmlinux.lds.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/kernel/vmlinux.lds.S	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,75 @@
+#define LOAD_OFFSET PAGE_OFFSET
+#include <asm/vmlinux.lds.h>
+#include <asm/page.h>
+#include <asm/cache.h>
+#include <asm/thread_info.h>
+
+OUTPUT_ARCH(riscv)
+ENTRY(_start)
+
+jiffies = jiffies_64;
+
+SECTIONS
+{
+	/* Beginning of code and text segment */
+	. = LOAD_OFFSET;
+	_start = .;
+	__init_begin = .;
+	HEAD_TEXT_SECTION
+	INIT_TEXT_SECTION(PAGE_SIZE)
+	INIT_DATA_SECTION(16)
+	/* we have to discard exit text and such at runtime, not link time */
+	.exit.text :
+	{
+		EXIT_TEXT
+	}
+	.exit.data :
+	{
+		EXIT_DATA
+	}
+	PERCPU_SECTION(L1_CACHE_BYTES)
+	__init_end = .;
+
+	.text : {
+		_text = .;
+		_stext = .;
+		TEXT_TEXT
+		SCHED_TEXT
+		LOCK_TEXT
+		KPROBES_TEXT
+		ENTRY_TEXT
+		IRQENTRY_TEXT
+		*(.fixup)
+		_etext = .;
+	}
+
+	/* Start of data section */
+	_sdata = .;
+	RO_DATA_SECTION(PAGE_SIZE)
+	RW_DATA_SECTION(0x40, PAGE_SIZE, THREAD_SIZE)
+	.sdata : {
+		_gp = . + 0x800;
+		*(.sdata*)
+	}
+	.srodata : {
+		*(.srodata*)
+	}
+	/* End of data section */
+	_edata = .;
+
+	BSS_SECTION(0x20, 0, 0x20)
+
+	EXCEPTION_TABLE(0x10)
+	NOTES
+
+	.rel.dyn : {
+		*(.rel.dyn*)
+	}
+
+	_end = .;
+
+	STABS_DEBUG
+	DWARF_DEBUG
+
+	DISCARDS
+}
diff -Nur linux-4.6.2/arch/riscv/lib/ashldi3.c linux-4.6.2.riscv/arch/riscv/lib/ashldi3.c
--- linux-4.6.2/arch/riscv/lib/ashldi3.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/ashldi3.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,28 @@
+#include <linux/export.h>
+
+#include "libgcc.h"
+
+long long __ashldi3(long long u, word_type b)
+{
+	DWunion uu, w;
+	word_type bm;
+
+	if (b == 0)
+		return u;
+
+	uu.ll = u;
+	bm = 32 - b;
+
+	if (bm <= 0) {
+		w.s.low = 0;
+		w.s.high = (unsigned int) uu.s.low << -bm;
+	} else {
+		const unsigned int carries = (unsigned int) uu.s.low >> bm;
+
+		w.s.low = (unsigned int) uu.s.low << b;
+		w.s.high = ((unsigned int) uu.s.high << b) | carries;
+	}
+
+	return w.ll;
+}
+EXPORT_SYMBOL(__ashldi3);
diff -Nur linux-4.6.2/arch/riscv/lib/ashrdi3.c linux-4.6.2.riscv/arch/riscv/lib/ashrdi3.c
--- linux-4.6.2/arch/riscv/lib/ashrdi3.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/ashrdi3.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,30 @@
+#include <linux/export.h>
+
+#include "libgcc.h"
+
+long long __ashrdi3(long long u, word_type b)
+{
+	DWunion uu, w;
+	word_type bm;
+
+	if (b == 0)
+		return u;
+
+	uu.ll = u;
+	bm = 32 - b;
+
+	if (bm <= 0) {
+		/* w.s.high = 1..1 or 0..0 */
+		w.s.high =
+		    uu.s.high >> 31;
+		w.s.low = uu.s.high >> -bm;
+	} else {
+		const unsigned int carries = (unsigned int) uu.s.high << bm;
+
+		w.s.high = uu.s.high >> b;
+		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
+	}
+
+	return w.ll;
+}
+EXPORT_SYMBOL(__ashrdi3);
diff -Nur linux-4.6.2/arch/riscv/lib/delay.c linux-4.6.2.riscv/arch/riscv/lib/delay.c
--- linux-4.6.2/arch/riscv/lib/delay.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/delay.c	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,24 @@
+#include <linux/delay.h>
+#include <linux/param.h>
+#include <linux/timex.h>
+#include <linux/export.h>
+
+void __delay(unsigned long cycles)
+{
+	cycle_t t0 = get_cycles();
+	while ((unsigned long)(get_cycles() - t0) < cycles)
+		cpu_relax();
+}
+
+void udelay(unsigned long usecs)
+{
+	__delay((unsigned long)(((u64)usecs * timebase) / 1000000UL));
+
+}
+EXPORT_SYMBOL(udelay);
+
+void ndelay(unsigned long nsecs)
+{
+	__delay((unsigned long)(((u64)nsecs * timebase) / 1000000000UL));
+}
+EXPORT_SYMBOL(ndelay);
diff -Nur linux-4.6.2/arch/riscv/lib/libgcc.h linux-4.6.2.riscv/arch/riscv/lib/libgcc.h
--- linux-4.6.2/arch/riscv/lib/libgcc.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/libgcc.h	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,32 @@
+#ifndef __ASM_LIBGCC_H
+#define __ASM_LIBGCC_H
+
+#include <asm/byteorder.h>
+
+typedef int word_type __attribute__ ((mode (__word__)));
+
+#ifdef __BIG_ENDIAN
+struct DWstruct {
+	int high, low;
+};
+#elif defined(__LITTLE_ENDIAN)
+struct DWstruct {
+	int low, high;
+};
+#else
+#error I feel sick.
+#endif
+
+typedef union {
+	struct DWstruct s;
+	long long ll;
+} DWunion;
+
+extern long long __ashldi3(long long u, word_type b);
+extern long long __ashrdi3(long long u, word_type b);
+extern word_type __cmpdi2(long long a, long long b);
+extern long long __lshrdi3(long long u, word_type b);
+extern long long __muldi3(long long u, long long v);
+extern word_type __ucmpdi2(unsigned long long a, unsigned long long b);
+
+#endif /* __ASM_LIBGCC_H */
diff -Nur linux-4.6.2/arch/riscv/lib/lshrdi3.c linux-4.6.2.riscv/arch/riscv/lib/lshrdi3.c
--- linux-4.6.2/arch/riscv/lib/lshrdi3.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/lshrdi3.c	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,28 @@
+#include <linux/export.h>
+
+#include "libgcc.h"
+
+long long __lshrdi3(long long u, word_type b)
+{
+	DWunion uu, w;
+	word_type bm;
+
+	if (b == 0)
+		return u;
+
+	uu.ll = u;
+	bm = 32 - b;
+
+	if (bm <= 0) {
+		w.s.high = 0;
+		w.s.low = (unsigned int) uu.s.high >> -bm;
+	} else {
+		const unsigned int carries = (unsigned int) uu.s.high << bm;
+
+		w.s.high = (unsigned int) uu.s.high >> b;
+		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
+	}
+
+	return w.ll;
+}
+EXPORT_SYMBOL(__lshrdi3);
diff -Nur linux-4.6.2/arch/riscv/lib/Makefile linux-4.6.2.riscv/arch/riscv/lib/Makefile
--- linux-4.6.2/arch/riscv/lib/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/Makefile	2017-03-04 02:48:34.166888015 +0100
@@ -0,0 +1,5 @@
+lib-y	:= delay.o memcpy.o memset.o uaccess.o
+
+ifeq ($(CONFIG_64BIT),)
+lib-y += ashldi3.o ashrdi3.o lshrdi3.o
+endif
diff -Nur linux-4.6.2/arch/riscv/lib/memcpy.S linux-4.6.2.riscv/arch/riscv/lib/memcpy.S
--- linux-4.6.2/arch/riscv/lib/memcpy.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/memcpy.S	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,85 @@
+#include <linux/linkage.h>
+#include <asm/asm.h>
+
+/* void *memcpy(void *, const void *, size_t) */
+ENTRY(memcpy)
+	move t6, a0  /* Preserve return value */
+
+	/* Defer to byte-oriented copy for small sizes */
+	sltiu a3, a2, 128
+	bnez a3, 4f
+	/* Use word-oriented copy only if low-order bits match */
+	andi a3, t6, SZREG-1
+	andi a4, a1, SZREG-1
+	bne a3, a4, 4f
+
+	beqz a3, 2f  /* Skip if already aligned */
+	/* Round to nearest double word-aligned address
+	   greater than or equal to start address */
+	andi a3, a1, ~(SZREG-1)
+	addi a3, a3, SZREG
+	/* Handle initial misalignment */
+	sub a4, a3, a1
+1:
+	lb a5, 0(a1)
+	addi a1, a1, 1
+	sb a5, 0(t6)
+	addi t6, t6, 1
+	bltu a1, a3, 1b
+	sub a2, a2, a4  /* Update count */
+
+2:
+	andi a4, a2, ~((16*SZREG)-1)
+	beqz a4, 4f
+	add a3, a1, a4
+3:
+	REG_L a4,       0(a1)
+	REG_L a5,   SZREG(a1)
+	REG_L a6, 2*SZREG(a1)
+	REG_L a7, 3*SZREG(a1)
+	REG_L t0, 4*SZREG(a1)
+	REG_L t1, 5*SZREG(a1)
+	REG_L t2, 6*SZREG(a1)
+	REG_L t3, 7*SZREG(a1)
+	REG_L t4, 8*SZREG(a1)
+	REG_L t5, 9*SZREG(a1)
+	REG_S a4,       0(t6)
+	REG_S a5,   SZREG(t6)
+	REG_S a6, 2*SZREG(t6)
+	REG_S a7, 3*SZREG(t6)
+	REG_S t0, 4*SZREG(t6)
+	REG_S t1, 5*SZREG(t6)
+	REG_S t2, 6*SZREG(t6)
+	REG_S t3, 7*SZREG(t6)
+	REG_S t4, 8*SZREG(t6)
+	REG_S t5, 9*SZREG(t6)
+	REG_L a4, 10*SZREG(a1)
+	REG_L a5, 11*SZREG(a1)
+	REG_L a6, 12*SZREG(a1)
+	REG_L a7, 13*SZREG(a1)
+	REG_L t0, 14*SZREG(a1)
+	REG_L t1, 15*SZREG(a1)
+	addi a1, a1, 16*SZREG
+	REG_S a4, 10*SZREG(t6)
+	REG_S a5, 11*SZREG(t6)
+	REG_S a6, 12*SZREG(t6)
+	REG_S a7, 13*SZREG(t6)
+	REG_S t0, 14*SZREG(t6)
+	REG_S t1, 15*SZREG(t6)
+	addi t6, t6, 16*SZREG
+	bltu a1, a3, 3b
+	andi a2, a2, (16*SZREG)-1  /* Update count */
+
+4:
+	/* Handle trailing misalignment */
+	beqz a2, 6f
+	add a3, a1, a2
+5:
+	lb a4, 0(a1)
+	addi a1, a1, 1
+	sb a4, 0(t6)
+	addi t6, t6, 1
+	bltu a1, a3, 5b
+6:
+	ret
+END(memcpy)
diff -Nur linux-4.6.2/arch/riscv/lib/memset.S linux-4.6.2.riscv/arch/riscv/lib/memset.S
--- linux-4.6.2/arch/riscv/lib/memset.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/memset.S	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,104 @@
+#include <linux/linkage.h>
+#include <asm/asm.h>
+
+/* void *memset(void *, int, size_t) */
+ENTRY(memset)
+	move t0, a0  /* Preserve return value */
+
+	/* Defer to byte-oriented fill for small sizes */
+	sltiu a3, a2, 16
+	bnez a3, 4f
+
+	/* Round to nearest XLEN-aligned address
+	   greater than or equal to start address */
+	addi a3, t0, SZREG-1
+	andi a3, a3, ~(SZREG-1)
+	beq a3, t0, 2f  /* Skip if already aligned */
+	/* Handle initial misalignment */
+	sub a4, a3, t0
+1:
+	sb a1, 0(t0)
+	addi t0, t0, 1
+	bltu t0, a3, 1b
+	sub a2, a2, a4  /* Update count */
+
+2: /* Duff's device with 32 XLEN stores per iteration */
+	/* Broadcast value into all bytes */
+	andi a1, a1, 0xff
+	slli a3, a1, 8
+	or a1, a3, a1
+	slli a3, a1, 16
+	or a1, a3, a1
+#ifdef CONFIG_64BIT
+	slli a3, a1, 32
+	or a1, a3, a1
+#endif
+
+	/* Calculate end address */
+	andi a4, a2, ~(SZREG-1)
+	add a3, t0, a4
+
+	andi a4, a4, 31*SZREG  /* Calculate remainder */
+	beqz a4, 3f            /* Shortcut if no remainder */
+	neg a4, a4
+	addi a4, a4, 32*SZREG  /* Calculate initial offset */
+
+	/* Adjust start address with offset */
+	sub t0, t0, a4
+
+	/* Jump into loop body */
+	/* Assumes 32-bit instruction lengths */
+	la a5, 3f
+#ifdef CONFIG_64BIT
+	srli a4, a4, 1
+#endif
+	add a5, a5, a4
+	jr a5
+3:
+	REG_S a1,        0(t0)
+	REG_S a1,    SZREG(t0)
+	REG_S a1,  2*SZREG(t0)
+	REG_S a1,  3*SZREG(t0)
+	REG_S a1,  4*SZREG(t0)
+	REG_S a1,  5*SZREG(t0)
+	REG_S a1,  6*SZREG(t0)
+	REG_S a1,  7*SZREG(t0)
+	REG_S a1,  8*SZREG(t0)
+	REG_S a1,  9*SZREG(t0)
+	REG_S a1, 10*SZREG(t0)
+	REG_S a1, 11*SZREG(t0)
+	REG_S a1, 12*SZREG(t0)
+	REG_S a1, 13*SZREG(t0)
+	REG_S a1, 14*SZREG(t0)
+	REG_S a1, 15*SZREG(t0)
+	REG_S a1, 16*SZREG(t0)
+	REG_S a1, 17*SZREG(t0)
+	REG_S a1, 18*SZREG(t0)
+	REG_S a1, 19*SZREG(t0)
+	REG_S a1, 20*SZREG(t0)
+	REG_S a1, 21*SZREG(t0)
+	REG_S a1, 22*SZREG(t0)
+	REG_S a1, 23*SZREG(t0)
+	REG_S a1, 24*SZREG(t0)
+	REG_S a1, 25*SZREG(t0)
+	REG_S a1, 26*SZREG(t0)
+	REG_S a1, 27*SZREG(t0)
+	REG_S a1, 28*SZREG(t0)
+	REG_S a1, 29*SZREG(t0)
+	REG_S a1, 30*SZREG(t0)
+	REG_S a1, 31*SZREG(t0)
+	addi t0, t0, 32*SZREG
+	bltu t0, a3, 3b
+	andi a2, a2, SZREG-1  /* Update count */
+
+4:
+	/* Handle trailing misalignment */
+	beqz a2, 6f
+	add a3, t0, a2
+5:
+	sb a1, 0(t0)
+	addi t0, t0, 1
+	bltu t0, a3, 5b
+6:
+	ret
+END(memset)
diff -Nur linux-4.6.2/arch/riscv/lib/uaccess.S linux-4.6.2.riscv/arch/riscv/lib/uaccess.S
--- linux-4.6.2/arch/riscv/lib/uaccess.S	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/lib/uaccess.S	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,125 @@
+#include <linux/linkage.h>
+#include <asm/asm.h>
+#include <asm/csr.h>
+
+	.altmacro
+	.macro fixup op reg addr lbl
+	LOCAL _epc
+_epc:
+	\op \reg, \addr
+	.section __ex_table,"a"
+	.balign SZPTR
+	PTR _epc, \lbl
+	.previous
+	.endm
+
+ENTRY(__copy_user)
+
+#ifdef CONFIG_RV_PUM
+	/* Enable access to user memory */
+	li t6, SR_PUM
+	csrc sstatus, t6
+#endif
+
+	add a3, a1, a2
+	/* Use word-oriented copy only if low-order bits match */
+	andi t0, a0, SZREG-1
+	andi t1, a1, SZREG-1
+	bne t0, t1, 2f
+
+	addi t0, a1, SZREG-1
+	andi t1, a3, ~(SZREG-1)
+	andi t0, t0, ~(SZREG-1)
+	/* a3: terminal address of source region
+	 * t0: lowest XLEN-aligned address in source
+	 * t1: highest XLEN-aligned address in source
+	 */
+	bgeu t0, t1, 2f
+	bltu a1, t0, 4f
+1:
+	fixup REG_L, t2, (a1), 10f
+	fixup REG_S, t2, (a0), 10f
+	addi a1, a1, SZREG
+	addi a0, a0, SZREG
+	bltu a1, t1, 1b
+2:
+	bltu a1, a3, 5f
+
+3:
+#ifdef CONFIG_RV_PUM
+	/* Disable access to user memory */
+	csrs sstatus, t6
+#endif
+	li a0, 0
+	ret
+4: /* Edge case: unalignment */
+	fixup lbu, t2, (a1), 10f
+	fixup sb, t2, (a0), 10f
+	addi a1, a1, 1
+	addi a0, a0, 1
+	bltu a1, t0, 4b
+	j 1b
+5: /* Edge case: remainder */
+	fixup lbu, t2, (a1), 10f
+	fixup sb, t2, (a0), 10f
+	addi a1, a1, 1
+	addi a0, a0, 1
+	bltu a1, a3, 5b
+	j 3b
+ENDPROC(__copy_user)
+
+
+ENTRY(__clear_user)
+
+#ifdef CONFIG_RV_PUM
+	/* Enable access to user memory */
+	li t6, SR_PUM
+	csrc sstatus, t6
+#endif
+
+	add a3, a0, a1
+	addi t0, a0, SZREG-1
+	andi t1, a3, ~(SZREG-1)
+	andi t0, t0, ~(SZREG-1)
+	/* a3: terminal address of target region
+	 * t0: lowest doubleword-aligned address in target region
+	 * t1: highest doubleword-aligned address in target region
+	 */
+	bgeu t0, t1, 2f
+	bltu a0, t0, 4f
+1:
+	fixup REG_S, zero, (a0), 10f
+	addi a0, a0, SZREG
+	bltu a0, t1, 1b
+2:
+	bltu a0, a3, 5f
+
+3:
+#ifdef CONFIG_RV_PUM
+	/* Disable access to user memory */
+	csrs sstatus, t6
+#endif
+	li a0, 0
+	ret
+4: /* Edge case: unalignment */
+	fixup sb, zero, (a0), 10f
+	addi a0, a0, 1
+	bltu a0, t0, 4b
+	j 1b
+5: /* Edge case: remainder */
+	fixup sb, zero, (a0), 10f
+	addi a0, a0, 1
+	bltu a0, a3, 5b
+	j 3b
+ENDPROC(__clear_user)
+
+	.section .fixup,"ax"
+	.balign 4
+10:
+#ifdef CONFIG_RV_PUM
+	/* Disable access to user memory */
+	csrs sstatus, t6
+#endif
+	sub a0, a3, a0
+	ret
+	.previous
diff -Nur linux-4.6.2/arch/riscv/Makefile linux-4.6.2.riscv/arch/riscv/Makefile
--- linux-4.6.2/arch/riscv/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/Makefile	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1,70 @@
+# BK Id: %F% %I% %G% %U% %#%
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies. Remember to do have actions
+# for "archclean" and "archdep" for cleaning up and making dependencies for
+# this architecture
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1994 by Linus Torvalds
+# Modifications for the RISC-V architecture:
+# Quan Nguyen <quannguyen@eecs.berkeley.edu>
+# Albert Ou <a_ou@eecs.berkeley.edu>
+#
+# Based on:
+# arch/score/Makefile
+
+LDFLAGS         :=
+OBJCOPYFLAGS    := -O binary
+LDFLAGS_vmlinux :=
+
+ifeq ($(ARCH),riscv)
+	KBUILD_DEFCONFIG = riscv64_spike
+else
+	KBUILD_DEFCONFIG = $(ARCH)_spike
+endif
+
+export BITS
+ifeq ($(CONFIG_64BIT),y)
+	BITS := 64
+	UTS_MACHINE := riscv64
+
+	KBUILD_CFLAGS += -mabi=lp64
+	KBUILD_AFLAGS += -mabi=lp64
+	KBUILD_MARCH = rv64im
+	LDFLAGS += -melf64lriscv
+else
+	BITS := 32
+	UTS_MACHINE := riscv32
+
+	KBUILD_CFLAGS += -mabi=ilp32
+	KBUILD_AFLAGS += -mabi=ilp32
+	KBUILD_MARCH = rv32im
+	LDFLAGS += -melf32lriscv
+endif
+
+ifeq ($(CONFIG_RV_ATOMIC),y)
+	KBUILD_RV_ATOMIC = a
+endif
+
+KBUILD_CFLAGS += -Wall
+
+ifeq ($(CONFIG_RVC),y)
+	KBUILD_RVC = c
+endif
+
+KBUILD_AFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_RV_ATOMIC)fd$(KBUILD_RVC)
+
+KBUILD_CFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_RV_ATOMIC)$(KBUILD_RVC)
+KBUILD_CFLAGS += -mno-save-restore
+
+head-y := arch/riscv/kernel/head.o
+
+core-y += arch/riscv/kernel/ arch/riscv/mm/
+
+libs-y += arch/riscv/lib/
+
+all: vmlinux
diff -Nur linux-4.6.2/arch/riscv/mm/extable.c linux-4.6.2.riscv/arch/riscv/mm/extable.c
--- linux-4.6.2/arch/riscv/mm/extable.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/mm/extable.c	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,14 @@
+#include <linux/module.h>
+#include <linux/uaccess.h>
+
+int fixup_exception(struct pt_regs *regs)
+{
+	const struct exception_table_entry *fixup;
+
+	fixup = search_exception_tables(regs->sepc);
+	if (fixup) {
+		regs->sepc = fixup->fixup;
+		return 1;
+	}
+	return 0;
+}
diff -Nur linux-4.6.2/arch/riscv/mm/fault.c linux-4.6.2.riscv/arch/riscv/mm/fault.c
--- linux-4.6.2/arch/riscv/mm/fault.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/mm/fault.c	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,250 @@
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/perf_event.h>
+#include <linux/signal.h>
+#include <linux/uaccess.h>
+
+#include <asm/pgalloc.h>
+#include <asm/ptrace.h>
+#include <asm/uaccess.h>
+
+/*
+ * This routine handles page faults.  It determines the address and the
+ * problem, and then passes it off to one of the appropriate routines.
+ */
+asmlinkage void do_page_fault(struct pt_regs *regs)
+{
+	struct task_struct *tsk;
+	struct vm_area_struct *vma;
+	struct mm_struct *mm;
+	unsigned long addr, cause;
+	unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
+	int fault, code = SEGV_MAPERR;
+
+	cause = regs->scause;
+	addr = regs->sbadaddr;
+
+	tsk = current;
+	mm = tsk->mm;
+
+	/*
+	 * Fault-in kernel-space virtual memory on-demand.
+	 * The 'reference' page table is init_mm.pgd.
+	 *
+	 * NOTE! We MUST NOT take any locks for this case. We may
+	 * be in an interrupt or a critical region, and should
+	 * only copy the information from the master page table,
+	 * nothing more.
+	 */
+	if (unlikely((addr >= VMALLOC_START) && (addr <= VMALLOC_END)))
+		goto vmalloc_fault;
+
+	/* Enable interrupts if they were enabled in the parent context. */
+	if (likely(regs->sstatus & SR_PIE))
+		local_irq_enable();
+
+	/*
+	 * If we're in an interrupt, have no user context, or are running
+	 * in an atomic region, then we must not take the fault.
+	 */
+	if (unlikely(faulthandler_disabled() || !mm))
+		goto no_context;
+
+	if (user_mode(regs))
+		flags |= FAULT_FLAG_USER;
+
+	perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr);
+
+retry:
+	down_read(&mm->mmap_sem);
+	vma = find_vma(mm, addr);
+	if (unlikely(!vma))
+		goto bad_area;
+	if (likely(vma->vm_start <= addr))
+		goto good_area;
+	if (unlikely(!(vma->vm_flags & VM_GROWSDOWN)))
+		goto bad_area;
+	if (unlikely(expand_stack(vma, addr)))
+		goto bad_area;
+
+	/*
+	 * Ok, we have a good vm_area for this memory access, so
+	 * we can handle it.
+	 */
+good_area:
+	code = SEGV_ACCERR;
+
+	switch (cause) {
+	case EXC_INST_ACCESS:
+		if (!(vma->vm_flags & VM_EXEC))
+			goto bad_area;
+		break;
+	case EXC_LOAD_ACCESS:
+		if (!(vma->vm_flags & VM_READ))
+			goto bad_area;
+		break;
+	case EXC_STORE_ACCESS:
+		if (!(vma->vm_flags & VM_WRITE))
+			goto bad_area;
+		flags |= FAULT_FLAG_WRITE;
+		break;
+	default:
+		panic("%s: unhandled cause %lu", __func__, cause);
+	}
+
+	/*
+	 * If for any reason at all we could not handle the fault,
+	 * make sure we exit gracefully rather than endlessly redo
+	 * the fault.
+	 */
+	fault = handle_mm_fault(mm, vma, addr, flags);
+
+	/*
+	 * If we need to retry but a fatal signal is pending, handle the
+	 * signal first. We do not need to release the mmap_sem because it
+	 * would already be released in __lock_page_or_retry in mm/filemap.c.
+	 */
+	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(tsk))
+		return;
+
+	if (unlikely(fault & VM_FAULT_ERROR)) {
+		if (fault & VM_FAULT_OOM)
+			goto out_of_memory;
+		else if (fault & VM_FAULT_SIGBUS)
+			goto do_sigbus;
+		BUG();
+	}
+
+	/*
+	 * Major/minor page fault accounting is only done on the
+	 * initial attempt. If we go through a retry, it is extremely
+	 * likely that the page will be found in page cache at that point.
+	 */
+	if (flags & FAULT_FLAG_ALLOW_RETRY) {
+		if (fault & VM_FAULT_MAJOR) {
+			tsk->maj_flt++;
+			perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, addr);
+		} else {
+			tsk->min_flt++;
+			perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, addr);
+		}
+		if (fault & VM_FAULT_RETRY) {
+			/*
+			 * Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk
+			 * of starvation.
+			 */
+			flags &= ~(FAULT_FLAG_ALLOW_RETRY);
+			flags |= FAULT_FLAG_TRIED;
+
+			/*
+			 * No need to up_read(&mm->mmap_sem) as we would
+			 * have already released it in __lock_page_or_retry
+			 * in mm/filemap.c.
+			 */
+			goto retry;
+		}
+	}
+
+	up_read(&mm->mmap_sem);
+	return;
+
+	/*
+	 * Something tried to access memory that isn't in our memory map.
+	 * Fix it, but check if it's kernel or user first.
+	 */
+bad_area:
+	up_read(&mm->mmap_sem);
+	/* User mode accesses just cause a SIGSEGV */
+	if (user_mode(regs)) {
+		do_trap(regs, SIGSEGV, code, addr, tsk);
+		return;
+	}
+
+no_context:
+	/* Are we prepared to handle this kernel fault? */
+	if (fixup_exception(regs)) {
+		return;
+	}
+
+	/*
+	 * Oops. The kernel tried to access some bad page. We'll have to
+	 * terminate things with extreme prejudice.
+	 */
+	bust_spinlocks(1);
+	pr_alert("Unable to handle kernel %s at virtual address " REG_FMT "\n",
+		(addr < PAGE_SIZE) ? "NULL pointer dereference" :
+		"paging request", addr);
+	die(regs, "Oops");
+	do_exit(SIGKILL);
+
+	/*
+	 * We ran out of memory, call the OOM killer, and return the userspace
+	 * (which will retry the fault, or kill us if we got oom-killed).
+	 */
+out_of_memory:
+	up_read(&mm->mmap_sem);
+	if (!user_mode(regs))
+		goto no_context;
+	pagefault_out_of_memory();
+	return;
+
+do_sigbus:
+	up_read(&mm->mmap_sem);
+	/* Kernel mode? Handle exceptions or die */
+	if (!user_mode(regs))
+		goto no_context;
+	do_trap(regs, SIGBUS, BUS_ADRERR, addr, tsk);
+	return;
+
+vmalloc_fault:
+	{
+		pgd_t *pgd, *pgd_k;
+		pud_t *pud, *pud_k;
+		pmd_t *pmd, *pmd_k;
+		pte_t *pte_k;
+		int index;
+
+	        if (user_mode(regs))
+			goto bad_area;
+
+		/*
+		 * Synchronize this task's top level page-table
+		 * with the 'reference' page table.
+		 *
+		 * Do _not_ use "tsk->active_mm->pgd" here.
+		 * We might be inside an interrupt in the middle
+		 * of a task switch.
+		 */
+		index = pgd_index(addr);
+		pgd = (pgd_t *)pfn_to_virt(csr_read(sptbr)) + index;
+		pgd_k = init_mm.pgd + index;
+
+		if (!pgd_present(*pgd_k))
+			goto no_context;
+		set_pgd(pgd, *pgd_k);
+
+		pud = pud_offset(pgd, addr);
+		pud_k = pud_offset(pgd_k, addr);
+		if (!pud_present(*pud_k))
+			goto no_context;
+
+		/* Since the vmalloc area is global, it is unnecessary
+		   to copy individual PTEs */
+		pmd = pmd_offset(pud, addr);
+		pmd_k = pmd_offset(pud_k, addr);
+		if (!pmd_present(*pmd_k))
+			goto no_context;
+		set_pmd(pmd, *pmd_k);
+
+		/* Make sure the actual PTE exists as well to
+		 * catch kernel vmalloc-area accesses to non-mapped
+		 * addresses. If we don't do this, this will just
+		 * silently loop forever.
+		 */
+		pte_k = pte_offset_kernel(pmd_k, addr);
+		if (!pte_present(*pte_k))
+			goto no_context;
+		return;
+	}
+}
diff -Nur linux-4.6.2/arch/riscv/mm/init.c linux-4.6.2.riscv/arch/riscv/mm/init.c
--- linux-4.6.2/arch/riscv/mm/init.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/mm/init.c	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,84 @@
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/initrd.h>
+#include <linux/memblock.h>
+#include <linux/swap.h>
+
+#include <asm/tlbflush.h>
+#include <asm/sections.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+
+#ifdef CONFIG_NUMA
+static void __init zone_sizes_init(void)
+{
+	unsigned long zones_size[MAX_NR_ZONES];
+	int nid;
+
+	memset(zones_size, 0, sizeof(zones_size));
+
+	for_each_online_node(nid) {
+		pg_data_t *pgdat;
+		unsigned long start_pfn, end_pfn;
+
+		pgdat = NODE_DATA(nid);
+		start_pfn = pgdat->bdata->node_min_pfn;
+		end_pfn = pgdat->bdata->node_low_pfn;
+		memblock_add_node(start_pfn,
+			PFN_PHYS(end_pfn - start_pfn), nid);
+	}
+
+	zones_size[ZONE_NORMAL] = pfn_base + max_mapnr;
+	free_area_init_nodes(zones_size);
+}
+#else
+static void __init zone_sizes_init(void)
+{
+	unsigned long zones_size[MAX_NR_ZONES];
+
+	memset(zones_size, 0, sizeof(zones_size));
+	memblock_add_node(PFN_PHYS(pfn_base), PFN_PHYS(max_mapnr), 0);
+	zones_size[ZONE_NORMAL] = pfn_base + max_mapnr;
+	free_area_init_nodes(zones_size);
+}
+#endif /* CONFIG_NUMA */
+
+void setup_zero_page(void)
+{
+	memset((void *)empty_zero_page, 0, PAGE_SIZE);
+}
+
+void __init paging_init(void)
+{
+	init_mm.pgd = (pgd_t *)pfn_to_virt(csr_read(sptbr));
+
+	setup_zero_page();
+	local_flush_tlb_all();
+	zone_sizes_init();
+}
+
+void __init mem_init(void)
+{
+#ifdef CONFIG_FLATMEM
+	BUG_ON(!mem_map);
+#endif /* CONFIG_FLATMEM */
+
+	high_memory = (void *)(__va(PFN_PHYS(max_low_pfn)));
+	free_all_bootmem();
+
+	mem_init_print_info(NULL);
+}
+
+void free_initmem(void)
+{
+	free_initmem_default(0);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+//	free_reserved_area(start, end, 0, "initrd");
+}
+#endif /* CONFIG_BLK_DEV_INITRD */
+
diff -Nur linux-4.6.2/arch/riscv/mm/ioremap.c linux-4.6.2.riscv/arch/riscv/mm/ioremap.c
--- linux-4.6.2/arch/riscv/mm/ioremap.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/mm/ioremap.c	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1,81 @@
+#include <linux/export.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+#include <linux/io.h>
+
+#include <asm/pgtable.h>
+
+/*
+ * Remap an arbitrary physical address space into the kernel virtual
+ * address space. Needed when the kernel wants to access high addresses
+ * directly.
+ *
+ * NOTE! We need to allow non-page-aligned mappings too: we will obviously
+ * have to convert them into an offset in a page-aligned mapping, but the
+ * caller shouldn't need to know that small detail.
+ */
+static void __iomem *__ioremap_caller(phys_addr_t addr, size_t size,
+	pgprot_t prot, void *caller)
+{
+	phys_addr_t last_addr;
+	unsigned long offset, vaddr;
+	struct vm_struct *area;
+
+	/* Disallow wrap-around or zero size */
+	last_addr = addr + size - 1;
+	if (!size || last_addr < addr) {
+		return NULL;
+	}
+
+	/* Page-align mappings */
+	offset = addr & (~PAGE_MASK);
+	addr &= PAGE_MASK;
+	size = PAGE_ALIGN(size + offset);
+
+	area = get_vm_area_caller(size, VM_IOREMAP, caller);
+	if (!area) {
+		return NULL;
+	}
+	vaddr = (unsigned long)area->addr;
+
+	if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
+		free_vm_area(area);
+		return NULL;
+	}
+
+	return (void __iomem *)(vaddr + offset);
+}
+
+/*
+ * ioremap     -   map bus memory into CPU space
+ * @offset:    bus address of the memory
+ * @size:      size of the resource to map
+ *
+ * ioremap performs a platform specific sequence of operations to
+ * make bus memory CPU accessible via the readb/readw/readl/writeb/
+ * writew/writel functions and the other mmio helpers. The returned
+ * address is not guaranteed to be usable directly as a virtual
+ * address.
+ *
+ * Must be freed with iounmap.
+ */
+void __iomem *ioremap(phys_addr_t offset, unsigned long size)
+{
+	return __ioremap_caller(offset, size, PAGE_KERNEL,
+		__builtin_return_address(0));
+}
+EXPORT_SYMBOL(ioremap);
+
+
+/**
+ * iounmap - Free a IO remapping
+ * @addr: virtual address from ioremap_*
+ *
+ * Caller must ensure there is only one unmapping for the same pointer.
+ */
+void iounmap(void __iomem *addr)
+{
+	vunmap((void *)((unsigned long)addr & PAGE_MASK));
+}
+EXPORT_SYMBOL(iounmap);
+
diff -Nur linux-4.6.2/arch/riscv/mm/Makefile linux-4.6.2.riscv/arch/riscv/mm/Makefile
--- linux-4.6.2/arch/riscv/mm/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/arch/riscv/mm/Makefile	2017-03-04 02:48:34.170888098 +0100
@@ -0,0 +1 @@
+obj-y := init.o fault.o extable.o ioremap.o
diff -Nur linux-4.6.2/.gitignore linux-4.6.2.riscv/.gitignore
--- linux-4.6.2/.gitignore	2016-06-08 03:23:53.000000000 +0200
+++ linux-4.6.2.riscv/.gitignore	2017-03-04 02:48:34.162887952 +0100
@@ -1,114 +1,11 @@
-#
-# NOTE! Don't add files that are generated in specific
-# subdirectories here. Add them in the ".gitignore" file
-# in that subdirectory instead.
-#
-# NOTE! Please use 'git ls-files -i --exclude-standard'
-# command after changing this file, to see if there are
-# any tracked files which get ignored after the change.
-#
-# Normal rules
-#
-.*
-*.o
-*.o.*
-*.a
-*.s
-*.ko
-*.so
-*.so.dbg
-*.mod.c
-*.i
-*.lst
-*.symtypes
-*.order
-*.elf
-*.bin
-*.tar
-*.gz
-*.bz2
-*.lzma
-*.xz
-*.lz4
-*.lzo
-*.patch
-*.gcno
-modules.builtin
-Module.symvers
-*.dwo
-*.su
+# Ignore everything...
+*
 
-#
-# Top-level generic files
-#
-/tags
-/TAGS
-/linux
-/vmlinux
-/vmlinux.32
-/vmlinux-gdb.py
-/vmlinuz
-/System.map
-/Module.markers
-
-#
-# Debian directory (make deb-pkg)
-#
-/debian/
-
-#
-# tar directory (make tar*-pkg)
-#
-/tar-install/
-
-#
-# git files that we don't want to ignore even it they are dot-files
-#
+# Then include just this.
+!arch/
 !.gitignore
-!.mailmap
-
-#
-# Generated include files
-#
-include/config
-include/generated
-arch/*/include/generated
-
-# stgit generated dirs
-patches-*
-
-# quilt's files
-patches
-series
-
-# cscope files
-cscope.*
-ncscope.*
-
-# gnu global files
-GPATH
-GRTAGS
-GSYMS
-GTAGS
-
-# id-utils files
-ID
-
-*.orig
-*~
-\#*#
-
-#
-# Leavings from module signing
-#
-extra_certificates
-signing_key.pem
-signing_key.priv
-signing_key.x509
-x509.genkey
+!README.md
 
-# Kconfig presets
-all.config
+# The arch/.gitignore and arch/riscv/.gitignore have patterns to un-ignore the
+# appropriate files.
 
-# Kdevelop4
-*.kdev4
diff -Nur linux-4.6.2/README.md linux-4.6.2.riscv/README.md
--- linux-4.6.2/README.md	1970-01-01 01:00:00.000000000 +0100
+++ linux-4.6.2.riscv/README.md	2017-03-04 02:48:34.162887952 +0100
@@ -0,0 +1,72 @@
+# Linux/RISC-V
+
+This is a port of Linux kernel for the [RISC-V](http://riscv.org/)
+instruction set architecture.
+Development is currently based on the
+[4.6 longterm branch](https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/log/?h=linux-4.6.y).
+
+
+## Obtaining kernel sources
+
+### Master
+
+Overlay the `riscv` architecture-specific subtree onto an upstream release:
+
+        $ curl -L https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.6.2.tar.xz | tar -xJ
+        $ cd linux-4.6.2
+        $ git init
+        $ git remote add -t master origin https://github.com/riscv/riscv-linux.git
+        $ git fetch
+        $ git checkout -f -t origin/master
+
+Note that the `-t <branch>` option minimizes the history fetched.
+To add another branch:
+
+        $ git remote set-branches --add origin <branch>
+        $ git fetch
+
+### Full kernel source trees
+
+For convenience, full kernel source trees are maintained on separate
+branches tracking
+[linux-stable](https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git):
+
+* `linux-4.6.y-riscv`
+* `linux-3.14.y-riscv` (historical)
+
+## Building the kernel image
+
+1. Create kernel configuration based on architecture defaults:
+
+        $ make ARCH=riscv defconfig
+
+1. Optionally edit the configuration via an ncurses interface:
+
+        $ make ARCH=riscv menuconfig
+
+1. Build the uncompressed kernel image:
+
+        $ make -j4 ARCH=riscv vmlinux
+
+1. Boot the kernel in the functional simulator, optionally specifying a
+   raw disk image for the root filesystem:
+
+        $ spike +disk=path/to/root.img bbl vmlinux
+
+   `bbl` (the Berkeley Boot Loader) is available from the
+   [riscv-pk](https://github.com/riscv/riscv-pk) repository.
+
+## Exporting kernel headers
+
+The `riscv-gnu-toolchain` repository includes a copy of the kernel header files.
+If the userspace API has changed, export the updated headers to the
+`riscv-gnu-toolchain` source directory:
+
+    $ make ARCH=riscv headers_check
+    $ make ARCH=riscv INSTALL_HDR_PATH=path/to/riscv-gnu-toolchain/linux-headers headers_install
+
+Rebuild `riscv64-unknown-linux-gnu-gcc` with the `linux` target:
+
+    $ cd path/to/riscv-gnu-toolchain
+    $ make linux
+
