add serial output function, Thanks Dennis <dennis.yxun@gmail.com>, his patch make me clear. Thank for Andy Green help.

qiboot/src/blink_led.c

@@ -66,7 +66,7 @@ int blue_on(int times)
   return 0;
 }
 
-int blink_led()
+int blink_led(void)
 {
   set_GPB();
 

qiboot/src/kboot-stage1.lds

@@ -32,23 +32,35 @@ SECTIONS
 	. = ALIGN(4);
 	.text      :
 	{
-	  start.o	(.text)
-	  lowlevel_init.o(.text)
-	  start_kboot.o	(.text)
+	  src/start.o	(.text)
+	  src/lowlevel_init.o(.text)
+	  src/start_kboot.o	(.text)
 	  *(.text)
 	}
 
 	. = ALIGN(4);
-	.rodata : { *(.rodata) }
+	.rodata : 
+    { 
+        *(.rodata) 
+    }
 
 	. = ALIGN(4);
-	.data : { *(.data) }
+	.data : 
+    { 
+        *(.data) 
+    }
 
 	. = ALIGN(4);
-	.got : { *(.got) }
+	.got : 
+    { 
+        *(.got) 
+    }
 
 	. = ALIGN(4);
 	__bss_start = .;
-	.bss : { *(.bss) }
+	.bss : 
+    { 
+        *(.bss) 
+    }
 	_end = .;
 }

qiboot/src/serial.c

@@ -0,0 +1,33 @@
+/*
+ * (C) Copyright 2007 OpenMoko, Inc.
+ * Author: xiangfu liu <xiangfu@openmoko.org>
+ *
+ * Configuation settings for the FIC Neo GTA02 Linux GSM phone
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+# include <serial.h>
+
+/*
+ * Output a single byte to the serial port.
+ */
+void serial_puti (const int i)
+{
+    while (!(UTRSTAT & 0x2));
+
+    rUTXH0 |= i;
+}

qiboot/src/start_kboot.c

@@ -21,6 +21,7 @@
  */
 #include "blink_led.h"
 #include "nand_read.h"
+#include "serial.h"
 /*
 unsigned char buf[]={
 0x0d,0xc0,0xa0,0xe1,0x00,0xd8,0x2d,0xe9,0x04,0xb0,0x4c,0xe2,0x4c,0x20,0x9f,0xe5,
@@ -36,14 +37,19 @@ unsigned char buf[2048];
 
 #define ADDR  ((volatile unsigned *)&buf) 
 
-int start_kboot()
+int start_kboot(void)
 {
-  if(nand_read_ll(buf, 0x32000000, sizeof(buf))==-1) 
-    {
-      while(1){blink_led(1);}
+    /*1 say hello to uart */ 
+    serial_puti (123);
+    blue_on(1);
+    /*2. test nand flash */
+    if(nand_read_ll(buf, 0x40000, sizeof(buf))==-1) {
+        while(1) {
+            blink_led();
+        }
     }
 
-  asm volatile("mov pc, %0\n"
+    asm volatile("mov pc, %0\n"
        :              /* output */
        :"r"(ADDR)     /* input */
        );