diff --git a/kernel/fpioa.c b/kernel/fpioa.c
index b74b659..3a67549 100644
--- a/kernel/fpioa.c
+++ b/kernel/fpioa.c
@@ -2,7 +2,8 @@
 
 #include "include/types.h"
 #include "include/fpioa.h"
-
+#include "include/riscv.h"
+#include "include/defs.h"
 /* Copyright 2018 Canaan Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -4935,4 +4936,5 @@ void fpioa_pin_init() {
     fpioa_set_function(26, FUNC_SPI0_D1);
 	fpioa_set_function(32, FUNC_GPIOHS7);
     fpioa_set_function(29, FUNC_SPI0_SS3);
+    printf("fpioa_pin_init\n");
 }
\ No newline at end of file
diff --git a/kernel/include/defs.h b/kernel/include/defs.h
index a4f4cfc..864da1e 100644
--- a/kernel/include/defs.h
+++ b/kernel/include/defs.h
@@ -113,7 +113,7 @@ void            yield(void);
 int             either_copyout(int user_dst, uint64 dst, void *src, uint64 len);
 int             either_copyin(void *dst, int user_src, uint64 src, uint64 len);
 void            procdump(void);
-void            test_proc_init(void);
+void            test_proc_init(int);
 
 // swtch.S
 void            swtch(struct context*, struct context*);
diff --git a/kernel/main.c b/kernel/main.c
index 7e34253..68b40d9 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -43,16 +43,13 @@ main(unsigned long hartid, unsigned long dtb_pa)
     // fileinit();      // file table
     //virtio_disk_init(); // emulated hard disk
     // userinit();      // first user process
-    test_proc_init();   // test porc init
+    test_proc_init(5);   // test porc init
 
-    // test_kalloc();    // test kalloc
-    // test_vm(hartid);       // test kernel pagetable
+    test_kalloc();    // test kalloc
+    test_vm(hartid);       // test kernel pagetable
     // test_sdcard();
 
     printf("hart 0 init done\n");
-    // scheduler();
-    // while (1) {
-    // }  
     for(int i = 1; i < NCPU; i++) {
       unsigned long mask = 1 << i;
       sbi_send_ipi(&mask);
@@ -66,11 +63,11 @@ main(unsigned long hartid, unsigned long dtb_pa)
       ;
     __sync_synchronize();
     printfinit();   // init a lock for printf 
-    // printf("hart %d enter main()...\n", hartid);
+    printf("hart %d enter main()...\n", hartid);
     kvminithart();
     trapinithart();
     device_init(dtb_pa, hartid);
-    // printf("hart 1 init done\n");
+    printf("hart 1 init done\n");
   }
   scheduler();
 
diff --git a/kernel/proc.c b/kernel/proc.c
index 79cca9a..4f1e717 100644
--- a/kernel/proc.c
+++ b/kernel/proc.c
@@ -244,56 +244,20 @@ uchar printhello[] = {
 };
 
 
-void test_proc_init() {
+void test_proc_init(int proc_num) {
+  if(proc_num > NPROC) panic("test_proc_init\n");
   struct proc *p;
-
+  for(int i = 0; i < proc_num; i++) {
     p = allocproc();
-    initproc = p;
-
     uvminit(p->pagetable, (uchar*)printhello, sizeof(printhello));
     p->sz = PGSIZE;
-
     p->trapframe->epc = 0x0;
     p->trapframe->sp = PGSIZE;
-
-    safestrcpy(p->name, "test_code_0", sizeof(p->name));
-
+    safestrcpy(p->name, "test_code", sizeof(p->name));
     p->state = RUNNABLE;
-
     release(&p->lock);
-
-	struct proc *p1;
-
-    p1 = allocproc();
-
-    uvminit(p1->pagetable, (uchar*)printhello, sizeof(printhello));
-    p1->sz = PGSIZE;
-
-    p1->trapframe->epc = 0x0;
-    p1->trapframe->sp = PGSIZE;
-
-    safestrcpy(p1->name, "test_code_1", sizeof(p1->name));
-
-    p1->state = RUNNABLE;
-
-    release(&p1->lock);
-
-  struct proc *p2;
-
-    p2 = allocproc();
-
-    uvminit(p2->pagetable, (uchar*)printhello, sizeof(printhello));
-    p2->sz = PGSIZE;
-
-    p2->trapframe->epc = 0x0;
-    p2->trapframe->sp = PGSIZE;
-
-    safestrcpy(p2->name, "test_code_2", sizeof(p2->name));
-
-    p2->state = RUNNABLE;
-
-    release(&p2->lock);
-
+  }
+  initproc = proc;
   printf("[test_proc]test_proc init done\n");
 }
 
@@ -640,7 +604,7 @@ forkret(void)
     first = 0;
     // fsinit(ROOTDEV);
   }
-  printf("[forket]call usertrapret\n");
+  // printf("[forket]call usertrapret\n");
   usertrapret();
 }
 
diff --git a/kernel/syscall.c b/kernel/syscall.c
index 2040e8b..92c44fb 100644
--- a/kernel/syscall.c
+++ b/kernel/syscall.c
@@ -151,6 +151,6 @@ syscall(void)
 
 uint64 
 sys_test(void) {
-    printf("hello world from proc %d\n", myproc()->pid);
+    printf("hello world from proc %d, core %d\n", myproc()->pid, r_tp());
     return 0;
 }
\ No newline at end of file
diff --git a/kernel/test.c b/kernel/test.c
index dd7e190..b3c4941 100644
--- a/kernel/test.c
+++ b/kernel/test.c
@@ -11,7 +11,7 @@
 #include "include/sbi.h"
 #include "include/sdcard.h"
 
-extern uint64 etext;
+extern char etext[];
 extern struct proc *initproc;
 void test_kalloc() {
     char *mem = kalloc();
@@ -21,31 +21,6 @@ void test_kalloc() {
     kfree(mem);
 }
 
-void ptesprint(pagetable_t pagetable, int level){
-  // there are 2^9 = 512 PTEs in a page table.
-  for(int i = 0; i < 512; i++){
-    pte_t pte = pagetable[i];
-    if(pte & PTE_V){
-      for(int j = 0; j < level-1; j++)
-        printf(".. ");
-      printf("..%d: pte %p pa %p\n", i, pte, PTE2PA(pte));
-    }
-    if((pte & PTE_V) && (pte & (PTE_R|PTE_W|PTE_X)) == 0){
-      // this PTE points to a lower-level page table.
-      uint64 child = PTE2PA(pte);
-      ptesprint((pagetable_t)child, level+1);
-    }
-  }
-}
-
-int vmprint(pagetable_t pagetable){
-
-  printf("page table %p\n", pagetable);
-  ptesprint(pagetable, 1);
-
-  return 0;
-}
-
 void test_vm(unsigned long hart_id) {
   printf("[test_vm]UART:\n");
   printf("[test_vm](kvmpa) va: %p, pa: %p\n", UART0, kvmpa(UART0));
@@ -71,10 +46,10 @@ void test_vm(unsigned long hart_id) {
   printf("[test_vm](kvmpa) va: %p, pa: %p\n", KERNBASE + 0x2000, kvmpa(KERNBASE + 0x2000));
   printf("[test_vm](kvmpa) va: %p, pa: %p\n", KERNBASE + 0x3000, kvmpa(KERNBASE + 0x3000));
   printf("[test_vm]etext:\n");
-  printf("[test_vm](kvmpa) va: %p, pa: %p\n", etext, kvmpa(etext));
-  printf("[test_vm](kvmpa) va: %p, pa: %p\n", etext + 0x1000, kvmpa(etext + 0x1000));
-  printf("[test_vm](kvmpa) va: %p, pa: %p\n", etext + 0x2000, kvmpa(etext + 0x2000));
-  printf("[test_vm](kvmpa) va: %p, pa: %p\n", etext + 0x3000, kvmpa(etext + 0x3000));
+  printf("[test_vm](kvmpa) va: %p, pa: %p\n", (uint64)etext, kvmpa((uint64)etext));
+  printf("[test_vm](kvmpa) va: %p, pa: %p\n", (uint64)etext + 0x1000, kvmpa((uint64)etext + 0x1000));
+  printf("[test_vm](kvmpa) va: %p, pa: %p\n", (uint64)etext + 0x2000, kvmpa((uint64)etext + 0x2000));
+  printf("[test_vm](kvmpa) va: %p, pa: %p\n", (uint64)etext + 0x3000, kvmpa((uint64)etext + 0x3000));
   printf("[test_vm]trampoline:\n");
   printf("[test_vm](kvmpa) va: %p, pa: %p\n", TRAMPOLINE, kvmpa(TRAMPOLINE));
   printf("[test_vm](kvmpa) va: %p, pa: %p\n", TRAMPOLINE + PGSIZE - 1, kvmpa(TRAMPOLINE + PGSIZE - 1));
diff --git a/kernel/trap.c b/kernel/trap.c
index 5f73300..8beb3b3 100644
--- a/kernel/trap.c
+++ b/kernel/trap.c
@@ -231,7 +231,8 @@ devintr()
     w_sip(r_sip() & ~2);
 
     return 2;
-  } else {
+  }
+  else {
     return 0;
   }
 }
diff --git a/kernel/vm.c b/kernel/vm.c
index e18bf77..15f54f2 100644
--- a/kernel/vm.c
+++ b/kernel/vm.c
@@ -227,9 +227,9 @@ uvminit(pagetable_t pagetable, uchar *src, uint sz)
   memset(mem, 0, PGSIZE);
   mappages(pagetable, 0, PGSIZE, (uint64)mem, PTE_W|PTE_R|PTE_X|PTE_U);
   memmove(mem, src, sz);
-  for (int i = 0; i < sz; i ++) {
-    printf("[uvminit]mem: %p, %x\n", mem + i, mem[i]);
-  }
+  // for (int i = 0; i < sz; i ++) {
+  //   printf("[uvminit]mem: %p, %x\n", mem + i, mem[i]);
+  // }
 }
 
 // Allocate PTEs and physical memory to grow process from oldsz to
diff --git a/linker/xv6.ld b/linker/xv6.ld
index 65deffe..7e09b54 100644
--- a/linker/xv6.ld
+++ b/linker/xv6.ld
@@ -4,10 +4,10 @@ ENTRY( _entry )
 SECTIONS
 {
   /*
-   * ensure that entry.S / _entry is at 0x80200000,
+   * ensure that entry.S / _entry is at 0x800200000,
    * where qemu's -kernel jumps.
    */
-  . = 0x80200000;
+  . = 0x80020000;
 
   .text : {
     *(.text .text.*)