diff --git a/bsp/hifive1/Makefile b/bsp/hifive1/Makefile
deleted file mode 100644
index b7def9d3f393f8d51e04b65586abd91f4e6009aa..0000000000000000000000000000000000000000
--- a/bsp/hifive1/Makefile
+++ /dev/null
@@ -1,126 +0,0 @@
-PREFIX 	= /home/zj/risc-v/riscv64-unknown-elf-gcc-20170612-x86_64-linux-centos6/bin/riscv64-unknown-elf-
-CC 	= $(PREFIX)gcc
-CPP	= $(PREFIX)g++
-AS 	= $(PREFIX)gcc
-AR 	= $(PREFIX)ar
-LINK 	= $(PREFIX)gcc
-SIZE 	= $(PREFIX)size
-OBJDUMP = $(PREFIX)objdump
-OBJCPY 	= $(PREFIX)objcopy
-GDB 	= $(PREFIX)gdb
-OPENOCD = /home/zj/risc-v/riscv-openocd-20170612-x86_64-linux-centos6/bin/openocd
-
-LIBS    = 
-DEVICE 	=  -mcpu=arm926ej-s  -ffunction-sections -fdata-sections
-CFLAGS 	= $(DEVICE) $(patsubst %, -I"%", $(CPATH)) 
-CXXFLAGS= $(CFLAGS)
-AFLAGS 	= $(DEVICE)  -c -x assembler-with-cpp
-LFLAGS 	= $(DEVICE)  -Wl,-Map=$(TARGET).map,-cref,-u,Reset_Handler \
-	  -T "ld" -nostartfiles $(patsubst %, -l%, $(LIBS)) \
-	  $(patsubst %, -L"%", $(LPATH))
-
-CPATH 	= 
-LPATH 	= 
-################################################################
-BUILD   = debug
-#BUILD   = release
-#BUILD_LIB = yes
-BUILD_LIB = no
-################################################################
-
-ifeq '$(BUILD)'  'debug'
-	CFLAGS +=  -O0 -gdwarf-2
-	AFLAGS +=  -gdwarf-2
-else
-	CFLAGS +=  -O2
-endif
-
-ROOT_DIR = $(shell pwd)
-SUB_DIR = ${shell ls -l "${ROOT_DIR}" | grep ^d | awk '{if($$9 != "build") print $$9 }'}
-################################################################
-BUILD_DIR = $(ROOT_DIR)/build/$(BUILD)
-BUILD_LIB_DIR =$(LPATH)
-################################################################
-TARGET = rtthread
-export CC CPP AS AR LINK SIZE OBJDUMP OBJCPY DEVICE CFLAGS CXXFLAGS ASFLAGS LFLAGS ROOT_DIR \
-       	BUILD BUILD_DIR BUILD_LIB_DIR
-
-SRC_FILE = ${wildcard *.c}
-SRC_FILE += ${wildcard *.cpp}
-SRC_FILE += ${wildcard *.s}
-#SRC_FILE = ${shell ls *.c}
-#OBJ_FILE = ${SRC_FILE:.c=.o}
-TMP = ${patsubst %.c, %.o, ${SRC_FILE}}
-TMP += ${patsubst %.cpp, %.o, ${SRC_FILE}}
-TMP += ${patsubst %.s, %.o, ${SRC_FILE}}
-OBJ_FILE = $(filter %.o, $(TMP))
-
-
-# Attempt to create a output directory.
-$(shell [ -d ${BUILD_DIR} ]  || mkdir -p ${BUILD_DIR})
-# Verify if it was successful.
-BUILD_DIR := $(shell cd $(BUILD_DIR) && /bin/pwd)
-$(if $(BUILD_DIR),,$(error output directory "$(saved-output)" does not exist))
-
-#all: $(TARGET)
-all:
-	scons -j4
-	#${SIZE}  -d "$(TARGET).axf"
-	${OBJDUMP}  -S -D "$(TARGET).axf" > "${TARGET}.s"
-
-
-$(SUB_DIR):ECHO
-	-make -C "${ROOT_DIR}/$@"
-
-%.o:%.cpp
-	${CPP} ${CXXFLAGS} -c "$^" -o "${BUILD_DIR}/$@"
-
-%.o:%.c
-	${CC} ${CFLAGS}    -c "$^" -o "${BUILD_DIR}/$@"
-
-%.o:%.s
-	${AS} ${ASFLAGS}   -c "$^" -o "${BUILD_DIR}/$@"
-
-ifneq "$(BUILD_LIB)" "yes"
-
-$(TARGET): $(SUB_DIR) $(OBJ_FILE)
-	cd "${BUILD_DIR}"  && ${CC}  $(filter %.o, $(shell  ls "$(BUILD_DIR)")) ${LFLAGS} -o "$(ROOT_DIR)/$(TARGET)" 
-	${OBJCPY} -I elf32-littlearm -O ihex $(TARGET) $(TARGET).hex
-	${OBJCPY} -I elf32-littlearm -O binary $(TARGET) $(TARGET).bin
-	${SIZE}  -d "$(TARGET)"
-	
-else
-
-$(TARGET): $(SUB_DIR) $(OBJ_FILE)
-	cd "${BUILD_DIR}"  && ${AR} -rc "$(BUILD_LIB_DIR)/lib${TARGET}.a" $(filter %.o, $(shell  ls "$(BUILD_DIR)"))
-
-endif
-
-ECHO:
-	@echo ${SUB_DIR}
-
-
-DEBUG_INTERFACE = jlink
-#DEBUG_INTERFACE = stlink-v2
-#DEBUG_INTERFACE = ftdi/openjtag
-
-GDB_CMD = -ex "tar ext 127.0.0.1:3333" 
-#GDB_CMD += -ex "monitor reset halt" 
-#GDB_CMD += -ex "monitor step 0x20400000" 
-GDB_CMD += --command=.gdbinit
-
-run:
-	setsid ${OPENOCD}   > /dev/null 2>&1 &
-	${GDB} ${TARGET}.axf  ${GDB_CMD}
-	killall -9 openocd
-
-programe:
-	setsid ${OPENOCD}   > /dev/null 2>&1 &
-	${GDB} ${TARGET}.axf -ex "tar ext 127.0.0.1:3333" -ex "monitor step 0x20400000" -ex "load ${TARGET}.axf"
-	killall -9 openocd
-
-clean:
-	-cd "${BUILD_DIR}" && rm *
-	-rm stm32*
-
-.PHONY: all
diff --git a/bsp/hifive1/drivers/cpuusage.c b/bsp/hifive1/drivers/cpuusage.c
index 5fe58a8bb8bc0bfbd5130ec9453adf71c8b4852c..659c2807d68c637dbf394834b3ab26baf595f877 100644
--- a/bsp/hifive1/drivers/cpuusage.c
+++ b/bsp/hifive1/drivers/cpuusage.c
@@ -7,7 +7,7 @@ static rt_uint32_t idle_begin = 0,idle_count = 0;
 static rt_uint32_t run_begin = 0,run_count = 0;
 static rt_uint32_t update_tick = 0;
 static wtdog_count = 0;
-#define jiffies 0
+#define jiffies rt_tick_get()
 
 void cpu_usage_idle_hook()
 {
diff --git a/libcpu/risc-v/e310/stack.c b/libcpu/risc-v/e310/stack.c
index eab608c753759938a1418cc3ac41e2b05a56993d..a86fae70ffaf002c832b42fb4e3b1dfc77a526b0 100644
--- a/libcpu/risc-v/e310/stack.c
+++ b/libcpu/risc-v/e310/stack.c
@@ -19,22 +19,10 @@
  *
  * Change Logs:
  * Date           Author       Notes
- * 2011-01-13     weety      copy from mini2440
+ * 2017-07-31     zhangjun      copy from mini2440
  */
 #include <rtthread.h>
 
-/*****************************/
-/* CPU Mode                  */
-/*****************************/
-#define USERMODE        0x10
-#define FIQMODE         0x11
-#define IRQMODE         0x12
-#define SVCMODE         0x13
-#define ABORTMODE       0x17
-#define UNDEFMODE       0x1b
-#define MODEMASK        0x1f
-#define NOINT           0xc0
-
 /**
  * This function will initialize thread stack
  *
@@ -86,7 +74,7 @@ rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
     *(--stk) = 0xffffffff;          	    /* t6 */
     *(--stk) = 0xffffffff;          	    /* tp */
     *(--stk) = 0xffffffff;          	    /* gp */
-    *(--stk) = 0x880;          	    /* mie */
+    *(--stk) = 0x880;          	            /* mie */
 //    *(--stk) = (rt_uint32_t)parameter;      /* r0 : argument */
     /* return task's current stack address */
     return (rt_uint8_t *)stk;
diff --git a/src/idle.c b/src/idle.c
index 7373f280e15fff56e9d0e782f2e2720dafae657d..db87baa4849ce29216f63abf545346e60e7fc81c 100644
--- a/src/idle.c
+++ b/src/idle.c
@@ -183,7 +183,6 @@ void rt_thread_idle_excute(void)
 
 static void rt_thread_idle_entry(void *parameter)
 {
-    rt_hw_interrupt_enable(0x888);
     while (1)
     {
     #ifdef RT_USING_IDLE_HOOK