diff --git a/nemu/include/common.h b/nemu/include/common.h
index fbffaa5..08a46e5 100644
--- a/nemu/include/common.h
+++ b/nemu/include/common.h
@@ -17,12 +17,12 @@
 #define __COMMON_H__
 
 #include <stdint.h>
-#include <inttypes.h>
 #include <stdbool.h>
 #include <string.h>
 
 #include <generated/autoconf.h>
 #include <macro.h>
+#include <types.h>
 
 #ifdef CONFIG_TARGET_AM
 #include <klib.h>
@@ -31,23 +31,6 @@
 #include <stdlib.h>
 #endif
 
-#if CONFIG_MBASE + CONFIG_MSIZE > 0x100000000ul
-#define PMEM64 1
-#endif
-
-typedef MUXDEF(CONFIG_ISA64, uint64_t, uint32_t) word_t;
-typedef MUXDEF(CONFIG_ISA64, int64_t, int32_t)  sword_t;
-static const word_t WORD_T_MAX = MUXDEF(CONFIG_ISA64, UINT64_MAX, UINT32_MAX);
-static const sword_t SWORD_T_MAX = MUXDEF(CONFIG_ISA64, INT64_MAX, INT32_MAX);
-static const sword_t SWORD_T_MIN = MUXDEF(CONFIG_ISA64, INT64_MIN, INT32_MIN);
-#define WORD_BYTES MUXDEF(CONFIG_ISA64, 8, 4)
-#define FMT_WORD MUXDEF(CONFIG_ISA64, "0x%016" PRIx64, "0x%08" PRIx32)
-
-typedef word_t vaddr_t;
-typedef MUXDEF(PMEM64, uint64_t, uint32_t) paddr_t;
-#define FMT_PADDR MUXDEF(PMEM64, "0x%016" PRIx64, "0x%08" PRIx32)
-typedef uint16_t ioaddr_t;
-
 #include <debug.h>
 
 #endif
diff --git a/nemu/include/debug.h b/nemu/include/debug.h
index 057f8bf..3aae781 100644
--- a/nemu/include/debug.h
+++ b/nemu/include/debug.h
@@ -16,10 +16,11 @@
 #ifndef __DEBUG_H__
 #define __DEBUG_H__
 
-#include <common.h>
 #include <stdio.h>
 #include <utils.h>
 
+IFDEF(CONFIG_ITRACE, void log_itrace_print());
+
 #define Trace(format, ...) \
     _Log("[TRACE] " format "\n", ## __VA_ARGS__)
 
diff --git a/nemu/include/types.h b/nemu/include/types.h
new file mode 100644
index 0000000..364f2ed
--- /dev/null
+++ b/nemu/include/types.h
@@ -0,0 +1,21 @@
+#ifndef __TYPES_H__
+#define __TYPES_H__
+#include <inttypes.h>
+#include <macro.h>
+#if CONFIG_MBASE + CONFIG_MSIZE > 0x100000000ul
+#define PMEM64 1
+#endif
+
+typedef MUXDEF(CONFIG_ISA64, uint64_t, uint32_t) word_t;
+typedef MUXDEF(CONFIG_ISA64, int64_t, int32_t)  sword_t;
+static const word_t WORD_T_MAX = MUXDEF(CONFIG_ISA64, UINT64_MAX, UINT32_MAX);
+static const sword_t SWORD_T_MAX = MUXDEF(CONFIG_ISA64, INT64_MAX, INT32_MAX);
+static const sword_t SWORD_T_MIN = MUXDEF(CONFIG_ISA64, INT64_MIN, INT32_MIN);
+#define WORD_BYTES MUXDEF(CONFIG_ISA64, 8, 4)
+#define FMT_WORD MUXDEF(CONFIG_ISA64, "0x%016" PRIx64, "0x%08" PRIx32)
+
+typedef word_t vaddr_t;
+typedef MUXDEF(PMEM64, uint64_t, uint32_t) paddr_t;
+#define FMT_PADDR MUXDEF(PMEM64, "0x%016" PRIx64, "0x%08" PRIx32)
+typedef uint16_t ioaddr_t;
+#endif
\ No newline at end of file
diff --git a/nemu/include/utils.h b/nemu/include/utils.h
index 59bc9df..f974584 100644
--- a/nemu/include/utils.h
+++ b/nemu/include/utils.h
@@ -16,7 +16,7 @@
 #ifndef __UTILS_H__
 #define __UTILS_H__
 
-#include <common.h>
+#include <types.h>
 
 // ----------- state -----------
 
@@ -74,7 +74,4 @@ uint64_t get_time();
   } while (0)
 
 
-IFDEF(CONFIG_ITRACE, void log_itrace_print());
-
-
 #endif
diff --git a/nemu/src/cpu/cpu-exec.c b/nemu/src/cpu/cpu-exec.c
index 72e1265..1e402ab 100644
--- a/nemu/src/cpu/cpu-exec.c
+++ b/nemu/src/cpu/cpu-exec.c
@@ -13,7 +13,7 @@
 * See the Mulan PSL v2 for more details.
 ***************************************************************************************/
 
-#include "utils.h"
+#include <utils.h>
 #include <cpu/cpu.h>
 #include <cpu/decode.h>
 #include <cpu/difftest.h>
diff --git a/nemu/src/isa/riscv32/inst.c b/nemu/src/isa/riscv32/inst.c
index 54b9044..c4d824f 100644
--- a/nemu/src/isa/riscv32/inst.c
+++ b/nemu/src/isa/riscv32/inst.c
@@ -13,12 +13,13 @@
  * See the Mulan PSL v2 for more details.
  ***************************************************************************************/
 
-#include "common.h"
+#include <common.h>
 #include "local-include/reg.h"
 #include <cpu/cpu.h>
 #include <cpu/ifetch.h>
 #include <cpu/decode.h>
 #include <ftrace.h>
+#include <utils.h>
 
 #define R(i) gpr(i)
 #define Mr vaddr_read
diff --git a/nemu/src/monitor/monitor.c b/nemu/src/monitor/monitor.c
index 1920ae4..6755edf 100644
--- a/nemu/src/monitor/monitor.c
+++ b/nemu/src/monitor/monitor.c
@@ -15,6 +15,7 @@
 
 #include <isa.h>
 #include <memory/paddr.h>
+#include <utils.h>
 
 void init_rand();
 void init_log(const char *log_file);
diff --git a/nemu/src/monitor/sdb/addrexp.y b/nemu/src/monitor/sdb/addrexp.y
index 8e7df9a..4094e0b 100644
--- a/nemu/src/monitor/sdb/addrexp.y
+++ b/nemu/src/monitor/sdb/addrexp.y
@@ -7,6 +7,7 @@
 }
 %{
     #include <common.h>
+    #include <utils.h>
     #include <isa.h>
     #include <stdio.h>
     #include <stdlib.h>
diff --git a/nemu/src/utils/ftrace.c b/nemu/src/utils/ftrace.c
index 25f097a..ec668c0 100644
--- a/nemu/src/utils/ftrace.c
+++ b/nemu/src/utils/ftrace.c
@@ -1,9 +1,8 @@
-#include "debug.h"
-#include "macro.h"
 #include <assert.h>
 #include <common.h>
 #include <elf.h>
 #include <ftrace.h>
+#include <utils.h>
 
 // Put this into another file
 #ifdef CONFIG_FTRACE
diff --git a/nemu/src/utils/log.c b/nemu/src/utils/log.c
index 7939d42..a041a2d 100644
--- a/nemu/src/utils/log.c
+++ b/nemu/src/utils/log.c
@@ -14,6 +14,7 @@
 ***************************************************************************************/
 
 #include <common.h>
+#include <utils.h>
 
 extern uint64_t g_nr_guest_inst;