diff --git a/bsp/dev3210/SConstruct b/bsp/dev3210/SConstruct
new file mode 100644
index 0000000000000000000000000000000000000000..daef69507919b65975c6cc03a910379c70a9d2f8
--- /dev/null
+++ b/bsp/dev3210/SConstruct
@@ -0,0 +1,40 @@
+import os
+import sys
+import rtconfig
+
+RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
+sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
+
+target = 'rtthread'
+projects = []
+
+env = Environment(tools = ['mingw'],
+	AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+	CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+	AR = rtconfig.AR, ARFLAGS = '-rc',
+	LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
+
+Export('env')
+Export('RTT_ROOT')
+Export('rtconfig')
+Export('projects')
+
+# kernel building script
+objs = SConscript(RTT_ROOT + '/src/SConscript', variant_dir='build/src', duplicate=0)
+# arch building script
+objs = objs + SConscript(RTT_ROOT + '/libcpu/SConscript', variant_dir='build/libcpu', duplicate=0)
+
+# component script
+Repository(RTT_ROOT)
+objs = objs + SConscript('components/SConscript')
+
+# board build script
+objs = objs + SConscript('SConscript', variant_dir='build/bsp', duplicate=0)
+
+if rtconfig.RT_USING_RTGUI:
+	objs = objs + SConscript(RTT_ROOT + '/examples/gui/SConscript', variant_dir='build/examples/gui', duplicate=0)
+
+TARGET = target + '.' + rtconfig.TARGET_EXT
+env.Program(TARGET, objs)
+env.AddPostAction(TARGET, rtconfig.POST_ACTION)
diff --git a/bsp/dev3210/application.c b/bsp/dev3210/application.c
new file mode 100644
index 0000000000000000000000000000000000000000..4400f2caf0d86bb90bc6dcd08f8d5d9b9e8a3932
--- /dev/null
+++ b/bsp/dev3210/application.c
@@ -0,0 +1,132 @@
+/*
+ * File      : app.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-06-25     Bernard      first version
+ */
+
+/**
+ * @addtogroup Loongson SoC3210
+ */
+/*@{*/
+#include <rtthread.h>
+#include <soc3210.h>
+
+struct rt_thread thread;
+ALIGN(4)
+rt_uint8_t thread_stack[1024];
+
+#include <finsh.h>
+void thread_entry(void* parameter)
+{
+	int i = 0;
+
+	while (1)
+	{
+		rt_kprintf("i = %d, cause: 0x%08x, config: 0x%08x\n", i++, read_c0_cause(), read_c0_config());
+		rt_kprintf("HSB_MISC_CFG 0x%08x\n", HSB_MISC_REG);
+		rt_thread_delay(100);
+	}
+}
+void thread_test()
+{
+	rt_err_t result = rt_thread_init(&thread, 
+		"tid", 
+		thread_entry, RT_NULL,
+		&thread_stack, sizeof(thread_stack), 
+		200,
+		5);
+	if (result == RT_EOK)
+		rt_thread_startup(&thread);
+	else
+		rt_kprintf("init thread failed\n");
+}
+FINSH_FUNCTION_EXPORT(thread_test, test thread!!);
+
+#include <rtgui/rtgui.h>
+#include <rtgui/event.h>
+#include <rtgui/rtgui_server.h>
+
+int rt_application_init()
+{
+	rtgui_rect_t rect;
+
+	rtgui_system_server_init();
+
+	/* register dock panel */
+	rect.x1 = 0;
+	rect.y1 = 0;
+	rect.x2 = 400;
+	rect.y2 = 480;
+	rtgui_panel_register("panel", &rect);
+
+	/* register main panel */
+	rect.x1 = 400;
+	rect.y1 = 0;
+	rect.x2 = 800;
+	rect.y2 = 480;
+	rtgui_panel_register("main", &rect);
+	rtgui_panel_set_default_focused("main");
+
+	rt_hw_lcd_init();
+
+	/* init example workbench */
+	// workbench_init();
+
+	return 0;
+}
+
+/* key simulator */
+static struct rtgui_event_kbd kbd_event;
+void key_simulator(int key)
+{
+    /* init keyboard event */
+    RTGUI_EVENT_KBD_INIT(&kbd_event);
+    kbd_event.mod  = RTGUI_KMOD_NONE;
+    kbd_event.unicode = 0;
+    kbd_event.type = RTGUI_KEYDOWN;
+	kbd_event.key  = key;
+
+	/* post down event */
+	rtgui_server_post_event(&(kbd_event.parent), sizeof(kbd_event));
+	
+	/* delay to post up event */
+	rt_thread_delay(50);
+
+	/* post up event */
+	kbd_event.type = RTGUI_KEYUP;
+	rtgui_server_post_event(&(kbd_event.parent), sizeof(kbd_event));
+}
+
+void left()
+{
+	key_simulator(RTGUIK_LEFT);
+}
+FINSH_FUNCTION_EXPORT(left, left key);
+
+void right()
+{
+	key_simulator(RTGUIK_LEFT);
+}
+FINSH_FUNCTION_EXPORT(right, right key);
+
+void down()
+{
+	key_simulator(RTGUIK_DOWN);
+}
+FINSH_FUNCTION_EXPORT(down, down key);
+
+void up()
+{
+	key_simulator(RTGUI_KEYUP);
+}
+FINSH_FUNCTION_EXPORT(up, up key);
+
+/*@}*/
diff --git a/bsp/dev3210/board.c b/bsp/dev3210/board.c
new file mode 100644
index 0000000000000000000000000000000000000000..c0f6710f02ce61bf8f74cb2e7a87a57e80631374
--- /dev/null
+++ b/bsp/dev3210/board.c
@@ -0,0 +1,102 @@
+/*
+ * File      : board.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-06-25     Bernard      first version
+ */
+
+#include <rtthread.h>
+#include <rthw.h>
+
+#include "board.h"
+#include "uart.h"
+#include <soc3210.h>
+
+/**
+ * @addtogroup Loongson SoC3210
+ */
+/*@{*/
+
+/**
+ * This is the timer interrupt service routine.
+ */
+void rt_hw_timer_handler()
+{
+    unsigned int count;
+
+    count = read_c0_compare();
+    write_c0_compare(count);
+    write_c0_count(0);
+
+	/* increase a OS tick */
+	rt_tick_increase();
+}
+
+/**
+ * This function will initial OS timer
+ */
+void rt_hw_timer_init()
+{
+    write_c0_compare(CPU_HZ/2/RT_TICK_PER_SECOND);
+    write_c0_count(0);
+}
+
+/**
+ * This function will initial sam7s64 board.
+ */
+void rt_hw_board_init()
+{
+#ifdef RT_USING_UART
+	/* init hardware UART device */
+	rt_hw_uart_init();
+#endif
+
+#ifdef RT_USING_CONSOLE
+	/* set console device */
+	rt_console_set_device("uart");
+#endif
+
+	/* init operating system timer */
+	rt_hw_timer_init();
+
+	rt_kprintf("current sr: 0x%08x\n", read_c0_status());
+}
+/*@}*/
+
+/* UART line status register value */
+#define UARTLSR_ERROR	(1 << 7)
+#define UARTLSR_TE		(1 << 6)
+#define UARTLSR_TFE		(1 << 5)
+#define UARTLSR_BI		(1 << 4)
+#define UARTLSR_FE		(1 << 3)
+#define UARTLSR_PE		(1 << 2)
+#define UARTLSR_OE		(1 << 1)
+#define UARTLSR_DR		(1 << 0)
+void rt_hw_console_output(const char* ptr)
+{
+	/* stream mode */
+	while (*ptr)
+	{
+		if (*ptr == '\n')
+		{
+			/* FIFO status, contain valid data */
+			while (!(UART_LSR(UART0_BASE) & (UARTLSR_TE | UARTLSR_TFE)));
+			/* write data */
+			UART_DAT(UART0_BASE) = '\r';
+		}
+
+		/* FIFO status, contain valid data */
+		while (!(UART_LSR(UART0_BASE) & (UARTLSR_TE | UARTLSR_TFE)));
+		/* write data */
+		UART_DAT(UART0_BASE) = *ptr;
+
+		ptr ++;
+	}
+}
diff --git a/bsp/dev3210/board.h b/bsp/dev3210/board.h
new file mode 100644
index 0000000000000000000000000000000000000000..51c083310f31274bd8de000f5e0cab04a7e1d8dc
--- /dev/null
+++ b/bsp/dev3210/board.h
@@ -0,0 +1,24 @@
+/*
+ * File      : board.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006-2010, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-06-25     Bernard      first version
+ */
+
+#ifndef __BOARD_H__
+#define __BOARD_H__
+
+void rt_hw_board_init(void);
+
+/* 32M SDRAM */
+#define RT_HW_HEAP_END	(0x80000000 + 32 * 1024 * 1024)
+#define CPU_HZ			(250 * 1000000)
+
+#endif
diff --git a/bsp/dev3210/dev3210_ram.lds b/bsp/dev3210/dev3210_ram.lds
new file mode 100644
index 0000000000000000000000000000000000000000..d3e177d02b8393581481a3f7e1192bd869b2ac7b
--- /dev/null
+++ b/bsp/dev3210/dev3210_ram.lds
@@ -0,0 +1,153 @@
+/*
+ * File      : jz47xx_ram.lds
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2010, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-17     swkyer       first version
+ * 2010-09-04     bernard      move the beginning entry to 0x80200000
+ */
+
+OUTPUT_FORMAT("elf32-tradlittlemips", "elf32-tradlittlemips", "elf32-tradlittlemips")
+OUTPUT_ARCH(mips)
+
+MEMORY
+{
+   /* 16M SDRAM */
+   DRAM : ORIGIN = 0x80200000, LENGTH = 0x01000000
+   /* 16K SRAM  */
+   IRAM : ORIGIN = 0x80000000, LENGTH = 0x00004000
+}
+
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x80200000 ;
+
+	.start :
+    {
+        *(.start);
+    } > DRAM
+
+    . = ALIGN(4);
+
+	.text : 
+    {
+     *(.text)
+     *(.text.*)
+     *(.rodata)
+     *(.rodata.*)
+     *(.rodata1)
+     *(.rodata1.*)
+     
+     /* section information for finsh shell */
+     . = ALIGN(4);
+     __fsymtab_start = .;
+     KEEP(*(FSymTab))
+     __fsymtab_end = .;
+     . = ALIGN(4);
+     __vsymtab_start = .;
+     KEEP(*(VSymTab))
+     __vsymtab_end = .;
+     . = ALIGN(4);
+    } > DRAM
+
+    . = ALIGN(4);
+
+	.data : 
+    {
+     *(.data)
+     *(.data.*)
+    
+     *(.data1)
+     *(.data1.*)
+     
+     . = ALIGN(8);
+     _gp = ABSOLUTE(.);     /* Base of small data */
+     
+     *(.sdata)
+     *(.sdata.*)
+    } > DRAM
+
+    . = ALIGN(4);
+	_iramat = .;
+
+	.iram : AT(_iramat)
+    {
+		_iramstart = .;
+        *(.vectors.1);
+        . = 0x100;
+        *(.vectors.2);
+        . = 0x180;
+        *(.vectors.3);
+        . = 0x200;
+        *(.vectors.4);
+        *(.vectors);
+
+        *(.icode);
+        *(.irodata);
+        *(.idata);
+        KEEP(*(.vectors*))
+		_iramend = .;
+    } > IRAM
+    _iramcopy = LOADADDR(.iram);
+
+	.sbss : 
+  	{
+	__bss_start = .;
+		*(.sbss)
+        *(.sbss.*)
+        *(.dynsbss)
+		*(.scommon)
+ 	} > DRAM
+
+ 	.bss :
+ 	{
+		*(.bss)
+        *(.bss.*)
+        *(.dynbss)
+		*(COMMON)
+	__bss_end = .;
+ 	} > DRAM
+	
+    _end = .;
+
+    /* Stabs debugging sections.  */
+    .stab          0 : { *(.stab) }
+    .stabstr       0 : { *(.stabstr) }
+    .stab.excl     0 : { *(.stab.excl) }
+    .stab.exclstr  0 : { *(.stab.exclstr) }
+    .stab.index    0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment       0 : { *(.comment) }
+    /* DWARF debug sections.
+     * Symbols in the DWARF debugging sections are relative to the beginning
+     * of the section so we begin them at 0.  */
+    /* DWARF 1 */
+    .debug          0 : { *(.debug) }
+    .line           0 : { *(.line) }
+    /* GNU DWARF 1 extensions */
+    .debug_srcinfo  0 : { *(.debug_srcinfo) }
+    .debug_sfnames  0 : { *(.debug_sfnames) }
+    /* DWARF 1.1 and DWARF 2 */
+    .debug_aranges  0 : { *(.debug_aranges) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    /* DWARF 2 */
+    .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
+    .debug_abbrev   0 : { *(.debug_abbrev) }
+    .debug_line     0 : { *(.debug_line) }
+    .debug_frame    0 : { *(.debug_frame) }
+    .debug_str      0 : { *(.debug_str) }
+    .debug_loc      0 : { *(.debug_loc) }
+    .debug_macinfo  0 : { *(.debug_macinfo) }
+    /* SGI/MIPS DWARF 2 extensions */
+    .debug_weaknames 0 : { *(.debug_weaknames) }
+    .debug_funcnames 0 : { *(.debug_funcnames) }
+    .debug_typenames 0 : { *(.debug_typenames) }
+    .debug_varnames  0 : { *(.debug_varnames) }
+}
diff --git a/bsp/dev3210/dw.txt b/bsp/dev3210/dw.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e58da7fea407d652c97a33e594d0fdd44ea98d16
--- /dev/null
+++ b/bsp/dev3210/dw.txt
@@ -0,0 +1,6 @@
+ifaddr dmfe0 192.168.1.100
+load tftp://192.168.1.5/boot_3210 0x80200000
+
+ifaddr dmfe0 192.168.1.100
+load tftp://192.168.1.5/rtthread.elf 0x80200000
+oload tftp://192.168.1.5/rtthread.bin 0x80200000
diff --git a/bsp/dev3210/lnn800x480.c b/bsp/dev3210/lnn800x480.c
new file mode 100644
index 0000000000000000000000000000000000000000..380034de840e64f1323b3db64e5299593b9aff48
--- /dev/null
+++ b/bsp/dev3210/lnn800x480.c
@@ -0,0 +1,184 @@
+/*
+ * File      : lcd_800480.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2010, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-01-01     bernard      first version from QiuYi's driver
+ */
+
+#include <rtthread.h>
+#include <soc3210.h>
+#include <rtgui/driver.h>
+#include <rtgui/color.h>
+
+/* LCD driver for 800x480 16bit */
+#define RT_HW_LCD_WIDTH		800
+#define RT_HW_LCD_HEIGHT	480
+
+ALIGN(4)
+volatile rt_uint16_t _rt_framebuffer[RT_HW_LCD_HEIGHT][RT_HW_LCD_WIDTH];
+
+#define K1BASE				0xA0000000
+#define KSEG1(addr)			((void *)(K1BASE | (rt_uint32_t)(addr)))
+#define HW_FB_ADDR			KSEG1(_rt_framebuffer)
+#define HW_FB_PIXEL(x, y)	*(volatile rt_uint16_t*)((rt_uint8_t*)HW_FB_ADDR + (y * RT_HW_LCD_WIDTH * 2) + x * 2)
+
+void rt_hw_lcd_update(rtgui_rect_t *rect)
+{
+}
+
+rt_uint8_t * rt_hw_lcd_get_framebuffer(void)
+{
+	return (rt_uint8_t *)HW_FB_ADDR;
+}
+
+void rt_hw_lcd_set_pixel(rtgui_color_t *c, rt_base_t x, rt_base_t y)
+{
+    if (x < RT_HW_LCD_WIDTH && y < RT_HW_LCD_HEIGHT)
+	{
+		HW_FB_PIXEL(x, y) = rtgui_color_to_565p(*c);
+	}
+}
+
+void rt_hw_lcd_get_pixel(rtgui_color_t *c, rt_base_t x, rt_base_t y)
+{
+    if (x < RT_HW_LCD_WIDTH && y < RT_HW_LCD_HEIGHT)
+	{
+		*c = rtgui_color_from_565p(HW_FB_PIXEL(x, y));
+	}
+
+    return ;
+}
+
+void rt_hw_lcd_draw_hline(rtgui_color_t *c, rt_base_t x1, rt_base_t x2, rt_base_t y)
+{
+	rt_uint32_t idx;
+	rt_uint16_t color;
+
+	/* get color pixel */
+	color = rtgui_color_to_565p(*c);
+
+	for (idx = x1; idx < x2; idx ++)
+	{
+		HW_FB_PIXEL(idx, y) = color;
+	}
+}
+
+void rt_hw_lcd_draw_vline(rtgui_color_t *c, rt_base_t x, rt_base_t y1, rt_base_t y2)
+{
+    rt_uint32_t idy;
+	rt_uint16_t color;
+
+	/* get color pixel */
+	color = rtgui_color_to_565p(*c);
+
+	for (idy = y1; idy < y2; idy ++)
+	{
+		HW_FB_PIXEL(x, idy) = color;
+	}
+}
+
+void rt_hw_lcd_draw_raw_hline(rt_uint8_t *pixels, rt_base_t x1, rt_base_t x2, rt_base_t y)
+{
+	rt_uint8_t* ptr;
+
+	ptr = (rt_uint8_t*)&HW_FB_PIXEL(x1, y);
+	rt_memcpy(ptr, pixels, (x2 - x1) * 2);
+}
+
+struct rtgui_graphic_driver _rtgui_lcd_driver =
+{
+	"lcd",
+	2,
+	RT_HW_LCD_WIDTH,
+	RT_HW_LCD_HEIGHT,
+	rt_hw_lcd_update,
+	rt_hw_lcd_get_framebuffer,
+	rt_hw_lcd_set_pixel,
+	rt_hw_lcd_get_pixel,
+	rt_hw_lcd_draw_hline,
+	rt_hw_lcd_draw_vline,
+	rt_hw_lcd_draw_raw_hline
+};
+
+#include "finsh.h"
+void hline(rt_uint32_t c, int x1, int x2, int y)
+{
+    rtgui_color_t color = (rtgui_color_t)c;
+    rt_hw_lcd_draw_hline(&color, x1, x2, y);
+}
+FINSH_FUNCTION_EXPORT(hline, draw a hline);
+
+void vline(rt_uint32_t c, int x, int y1, int y2)
+{
+    rtgui_color_t color = (rtgui_color_t)c;
+    rt_hw_lcd_draw_vline(&color, x, y1, y2);
+}
+FINSH_FUNCTION_EXPORT(vline, draw a vline);
+
+void clear()
+{
+    int y;
+
+    for (y = 0; y < _rtgui_lcd_driver.height; y ++)
+    {
+        rt_hw_lcd_draw_hline((rtgui_color_t*)&white, 0, 240, y);
+    }
+}
+FINSH_FUNCTION_EXPORT(clear, clear screen);
+
+void fill(rt_uint32_t c)
+{
+    int y;
+	rtgui_color_t color = (rtgui_color_t)c;
+
+    for (y = 0; y < _rtgui_lcd_driver.height; y ++)
+    {
+        rt_hw_lcd_draw_hline(&color, 0, _rtgui_lcd_driver.width, y);
+    }
+}
+FINSH_FUNCTION_EXPORT(fill, fill screen with color);
+
+void lcd_init()
+{
+	/* disable LCD controller */
+	LCD_CTRL = LCD_CTRL & 0xfffe;
+
+	/* set LCD clock */
+	HSB_MISC_REG = (HSB_MISC_REG & 0xFFFD01FF) | 
+		(0x01 << 17) | /* enable LCD */
+		(0x05 << 9);    /* clock */
+
+	LCD_VBARA = (rt_uint32_t)_rt_framebuffer - 0x80000000;
+	LCD_VBARB = (rt_uint32_t)_rt_framebuffer - 0x80000000;
+
+	LCD_HTIM  = 0x12c031f;
+	LCD_VTIM  = 0x11501df;
+	LCD_HVLEN = 0x41e0279;
+
+	LCD_CTRL = 0x8709;
+
+	rt_kprintf("VBARA 0x%08x\n", LCD_VBARA);
+	rt_kprintf("CTRL 0x%08x\n", LCD_CTRL);
+	rt_kprintf("HTIM 0x%08x\n", LCD_HTIM);
+	rt_kprintf("VTIM 0x%08x\n", LCD_VTIM);
+	rt_kprintf("HVLEN 0x%08x\n", LCD_HVLEN);
+	rt_kprintf("HSB_MISC 0x%08x\n", HSB_MISC_REG);
+
+#ifdef RT_USING_RTGUI
+	/* add lcd driver into graphic driver */
+	rtgui_graphic_driver_add(&_rtgui_lcd_driver);
+#endif
+}
+FINSH_FUNCTION_EXPORT(lcd_init, init lcd);
+
+void rt_hw_lcd_init()
+{
+	lcd_init();
+}
diff --git a/bsp/dev3210/rtconfig.h b/bsp/dev3210/rtconfig.h
new file mode 100644
index 0000000000000000000000000000000000000000..7b8b32600f1c7c35a803ebeef652c6a23bd89f47
--- /dev/null
+++ b/bsp/dev3210/rtconfig.h
@@ -0,0 +1,154 @@
+/* RT-Thread config file */
+#ifndef __RTTHREAD_CFG_H__
+#define __RTTHREAD_CFG_H__
+
+/* RT_NAME_MAX*/
+#define RT_NAME_MAX	10
+
+/* RT_ALIGN_SIZE*/
+#define RT_ALIGN_SIZE	4
+
+/* PRIORITY_MAX */
+#define RT_THREAD_PRIORITY_MAX	256
+
+/* Tick per Second */
+#define RT_TICK_PER_SECOND	100
+
+/* SECTION: RT_DEBUG */
+/* Thread Debug */
+#define RT_DEBUG
+#define RT_USING_OVERFLOW_CHECK
+
+/* Using Hook */
+#define RT_USING_HOOK
+
+/* Using Software Timer */
+/* #define RT_USING_TIMER_SOFT */
+#define RT_TIMER_THREAD_PRIO		4
+#define RT_TIMER_THREAD_STACK_SIZE	512
+#define RT_TIMER_TICK_PER_SECOND	10
+
+/* SECTION: IPC */
+/* Using Semaphore */
+#define RT_USING_SEMAPHORE
+
+/* Using Mutex */
+#define RT_USING_MUTEX
+
+/* Using Event */
+#define RT_USING_EVENT
+
+/* Using MailBox */
+#define RT_USING_MAILBOX
+
+/* Using Message Queue */
+#define RT_USING_MESSAGEQUEUE
+
+/* SECTION: Memory Management */
+/* Using Memory Pool Management*/
+#define RT_USING_MEMPOOL
+
+/* Using Dynamic Heap Management */
+#define RT_USING_HEAP
+
+/* Using SLAB MM */
+#define RT_USING_SLAB
+
+/* SECTION: Device System */
+/* Using Device System */
+#define RT_USING_DEVICE
+#define RT_USING_UART
+#define RT_USING_UART1
+#define RT_UART_RX_BUFFER_SIZE	64
+
+/* SECTION: Console options */
+/* the buffer size of console */
+#define RT_USING_CONSOLE
+#define RT_CONSOLEBUF_SIZE	128
+
+/* SECTION: finsh, a C-Express shell */
+/* Using FinSH as Shell*/
+#define RT_USING_FINSH
+/* Using symbol table */
+#define FINSH_USING_SYMTAB
+#define FINSH_USING_DESCRIPTION
+#define FINSH_DEVICE_NAME "uart"
+
+/* SECTION: device filesystem support */
+/* #define RT_USING_DFS */
+#define RT_USING_DFS_ELMFAT
+
+/* the max number of mounted filesystem */
+#define DFS_FILESYSTEMS_MAX			2
+/* the max number of opened files 		*/
+#define DFS_FD_MAX					4
+/* the max number of cached sector 		*/
+#define DFS_CACHE_MAX_NUM   		4
+
+/* SECTION: lwip, a lighwight TCP/IP protocol stack */
+/* #define RT_USING_LWIP */
+#define RT_LWIP_USING_RT_MEM
+
+/* Enable ICMP protocol*/
+#define RT_LWIP_ICMP
+/* Enable UDP protocol*/
+#define RT_LWIP_UDP
+/* Enable TCP protocol*/
+#define RT_LWIP_TCP
+/* Enable DNS */
+#define RT_LWIP_DNS
+
+/* the number of simulatenously active TCP connections*/
+#define RT_LWIP_TCP_PCB_NUM	5
+
+/* ip address of target*/
+#define RT_LWIP_IPADDR0	192
+#define RT_LWIP_IPADDR1	168
+#define RT_LWIP_IPADDR2	1
+#define RT_LWIP_IPADDR3	30
+
+/* gateway address of target*/
+#define RT_LWIP_GWADDR0	192
+#define RT_LWIP_GWADDR1	168
+#define RT_LWIP_GWADDR2	1
+#define RT_LWIP_GWADDR3	1
+
+/* mask address of target*/
+#define RT_LWIP_MSKADDR0	255
+#define RT_LWIP_MSKADDR1	255
+#define RT_LWIP_MSKADDR2	255
+#define RT_LWIP_MSKADDR3	0
+
+/* tcp thread options */
+#define RT_LWIP_TCPTHREAD_PRIORITY		12
+#define RT_LWIP_TCPTHREAD_MBOX_SIZE		4
+#define RT_LWIP_TCPTHREAD_STACKSIZE		1024
+
+/* ethernet if thread options */
+#define RT_LWIP_ETHTHREAD_PRIORITY		15
+#define RT_LWIP_ETHTHREAD_MBOX_SIZE		4
+#define RT_LWIP_ETHTHREAD_STACKSIZE		512
+
+/* SECTION: RT-Thread/GUI */
+#define RT_USING_RTGUI
+
+/* name length of RTGUI object */
+#define RTGUI_NAME_MAX		12
+/* support 16 weight font */
+#define RTGUI_USING_FONT16
+/* support 12 weight font */
+#define RTGUI_USING_FONT12
+/* support Chinese font */
+#define RTGUI_USING_FONTHZ
+/* use DFS as file interface */
+#define RTGUI_USING_DFS_FILERW
+/* use bmp font as Chinese font */
+#define RTGUI_USING_HZ_BMP
+/* use small size in RTGUI */
+#define RTGUI_USING_SMALL_SIZE
+/* use mouse cursor */
+/* #define RTGUI_USING_MOUSE_CURSOR */
+/* default font size in RTGUI */
+#define RTGUI_DEFAULT_FONT_SIZE	16
+
+#endif
diff --git a/bsp/dev3210/rtconfig.py b/bsp/dev3210/rtconfig.py
new file mode 100644
index 0000000000000000000000000000000000000000..2f7b09c52f62b70ede86023e0816b2e39e96b80d
--- /dev/null
+++ b/bsp/dev3210/rtconfig.py
@@ -0,0 +1,88 @@
+import SCons.cpp
+
+# component options
+
+# make all component false
+RT_USING_FINSH 		= False
+RT_USING_DFS 		= False
+RT_USING_DFS_ELMFAT = False
+RT_USING_DFS_YAFFS2	= False
+RT_USING_LWIP 		= False
+RT_USING_WEBSERVER	= False
+RT_USING_RTGUI 		= False
+RT_USING_MODULE		= False
+
+# parse rtconfig.h to get used component
+PreProcessor = SCons.cpp.PreProcessor()
+f = file('rtconfig.h', 'r')
+contents = f.read()
+f.close()
+PreProcessor.process_contents(contents)
+rtconfig_ns = PreProcessor.cpp_namespace
+
+# finsh shell options
+if rtconfig_ns.has_key('RT_USING_FINSH'):
+	RT_USING_FINSH = True
+
+# device virtual filesystem options
+if rtconfig_ns.has_key('RT_USING_DFS'):
+    RT_USING_DFS = True
+
+    if rtconfig_ns.has_key('RT_USING_DFS_ELMFAT'):
+        RT_USING_DFS_ELMFAT = True
+    if rtconfig_ns.has_key('RT_USING_DFS_YAFFS2'):
+        RT_USING_DFS_YAFFS2 = True
+
+# lwip options
+if rtconfig_ns.has_key('RT_USING_LWIP'):
+    RT_USING_LWIP = True
+    if rtconfig_ns.has_key('RT_USING_WEBSERVER'):
+        RT_USING_WEBSERVER = True
+
+# rtgui options
+if rtconfig_ns.has_key('RT_USING_RTGUI'):
+    RT_USING_RTGUI = True
+
+# module options
+if rtconfig_ns.has_key('RT_USING_MODULE'):
+    RT_USING_MODULE = True
+
+# CPU options
+ARCH='mips'
+CPU ='loongson'
+
+# toolchains options
+CROSS_TOOL  = 'gcc'
+PLATFORM 	= 'gcc'
+EXEC_PATH 	= 'E:/Program Files/CodeSourcery/Sourcery G++ Lite/bin'
+BUILD		= 'debug'
+
+PREFIX = 'mips-sde-elf-'
+CC = PREFIX + 'gcc'
+AS = PREFIX + 'gcc'
+AR = PREFIX + 'ar'
+LINK = PREFIX + 'gcc'
+TARGET_EXT = 'elf'
+SIZE = PREFIX + 'size'
+OBJDUMP = PREFIX + 'objdump'
+OBJCPY = PREFIX + 'objcopy'
+READELF = PREFIX + 'readelf'
+
+DEVICE = ' -mips2'
+CFLAGS = DEVICE + ' -EL -G0 -DRT_USING_MINILIBC -mno-abicalls -fno-pic -fno-builtin -fno-exceptions -ffunction-sections -fomit-frame-pointer'
+AFLAGS = ' -c' + DEVICE + ' -EL -fno-pic -fno-builtin -mno-abicalls -x assembler-with-cpp'
+LFLAGS = DEVICE + ' -EL -Wl,--gc-sections,-Map=rtthread-3210.map,-cref,-u,Reset_Handler -T dev3210_ram.lds'
+
+CPATH = ''
+LPATH = ''
+
+if BUILD == 'debug':
+	CFLAGS += ' -O0 -gdwarf-2'
+	AFLAGS += ' -gdwarf-2'
+else:
+	CFLAGS += ' -O2'
+
+RT_USING_MINILIBC = True
+DUMP_ACTION = OBJDUMP + ' -D -S $TARGET > rtt.asm\n'
+READELF_ACTION = READELF + ' -a $TARGET > rtt.map\n'
+POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n' + READELF_ACTION
diff --git a/bsp/dev3210/startup.c b/bsp/dev3210/startup.c
new file mode 100644
index 0000000000000000000000000000000000000000..29aa38e2ec235eba45c55ea6cdec61a940994122
--- /dev/null
+++ b/bsp/dev3210/startup.c
@@ -0,0 +1,103 @@
+/*
+ * File      : startup.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Develop Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-06-25     Bernard      first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <cache.h>
+
+#include "board.h"
+
+/**
+ * @addtogroup Loongson SoC3210
+ */
+
+/*@{*/
+extern unsigned char __bss_start;
+extern unsigned char __bss_end;
+
+extern int rt_application_init(void);
+
+void dump_mem(const unsigned char* addr)
+{
+	int size;
+	rt_kprintf("---- memory: 0x%08x ----\n", addr);
+	for (size = 0; size < 32 * 4; size ++)
+	{
+		rt_kprintf("%02x ", (*addr) & 0xff);
+		addr ++;
+		if ((size + 1) % 16 == 0)
+			rt_kprintf("\n");
+	}
+	rt_kprintf("\n");
+}
+
+/**
+ * This function will startup RT-Thread RTOS.
+ */
+void rtthread_startup(void)
+{
+	/* init cache */
+	rt_hw_cache_init();
+	/* init hardware interrupt */
+	rt_hw_interrupt_init();
+
+	/*
+	dump_mem((rt_uint8_t*)0x80000000);
+	dump_mem((rt_uint8_t*)0x80000100);
+	dump_mem((rt_uint8_t*)0x80000180);
+	dump_mem((rt_uint8_t*)0x80000200);
+	*/
+
+	/* init board */
+	rt_hw_board_init();
+	rt_show_version();
+
+	/* init tick */
+	rt_system_tick_init();
+
+	/* init timer system */
+	rt_system_timer_init();
+
+#ifdef RT_USING_HEAP
+	rt_system_heap_init((void*)&__bss_end, (void*)RT_HW_HEAP_END);
+#endif
+
+	/* init scheduler system */
+	rt_system_scheduler_init();
+
+#ifdef RT_USING_DEVICE
+	/* init all device */
+	rt_device_init_all();
+#endif
+
+	/* init application */
+	rt_application_init();
+
+#ifdef RT_USING_FINSH
+	/* init finsh */
+	finsh_system_init();
+	finsh_set_device(FINSH_DEVICE_NAME);
+#endif
+
+	/* init idle thread */
+	rt_thread_idle_init();
+
+	/* start scheduler */
+	rt_system_scheduler_start();
+
+	/* never reach here */
+	return ;
+}
+
+/*@}*/
diff --git a/bsp/dev3210/uart.c b/bsp/dev3210/uart.c
new file mode 100644
index 0000000000000000000000000000000000000000..8851678e68612f0a731e8bed15034809f420742b
--- /dev/null
+++ b/bsp/dev3210/uart.c
@@ -0,0 +1,282 @@
+#include <rthw.h>
+#include <rtthread.h>
+
+#include <soc3210.h>
+
+/**
+ * @addtogroup Loongson SoC3210
+ */
+
+/*@{*/
+#if defined(RT_USING_UART) && defined(RT_USING_DEVICE)
+
+/* UART interrupt enable register value */
+#define UARTIER_IME		(1 << 3)
+#define UARTIER_ILE		(1 << 2) 
+#define UARTIER_ITXE	(1 << 1)
+#define UARTIER_IRXE	(1 << 0)
+
+/* UART line control register value */
+#define UARTLCR_DLAB	(1 << 7)
+#define UARTLCR_BCB		(1 << 6)
+#define UARTLCR_SPB		(1 << 5)
+#define UARTLCR_EPS		(1 << 4)
+#define UARTLCR_PE		(1 << 3)
+#define UARTLCR_SB		(1 << 2)
+
+/* UART line status register value */
+#define UARTLSR_ERROR	(1 << 7)
+#define UARTLSR_TE		(1 << 6)
+#define UARTLSR_TFE		(1 << 5)
+#define UARTLSR_BI		(1 << 4)
+#define UARTLSR_FE		(1 << 3)
+#define UARTLSR_PE		(1 << 2)
+#define UARTLSR_OE		(1 << 1)
+#define UARTLSR_DR		(1 << 0)
+
+struct rt_uart_soc3210
+{
+	struct rt_device parent;
+
+	rt_uint32_t hw_base;
+	rt_uint32_t irq;
+
+	/* buffer for reception */
+	rt_uint8_t read_index, save_index;
+	rt_uint8_t rx_buffer[RT_UART_RX_BUFFER_SIZE];
+}uart_device;
+
+static void rt_uart_irqhandler(int irqno)
+{
+	rt_ubase_t level;
+	rt_uint8_t isr;
+    struct rt_uart_soc3210* uart = &uart_device;
+
+    /* read interrupt status and clear it */
+	isr = UART_IIR(uart->hw_base);
+	isr = (isr >> 1) & 0x3;
+
+	if (isr & 0x02) /* receive data available */
+	{
+		/* Receive Data Available */
+		while (UART_LSR(uart->hw_base) & UARTLSR_DR)
+		{
+			uart->rx_buffer[uart->save_index] = UART_DAT(uart->hw_base);
+
+			level = rt_hw_interrupt_disable();
+			uart->save_index ++;
+			if (uart->save_index >= RT_UART_RX_BUFFER_SIZE)
+				uart->save_index = 0;
+			rt_hw_interrupt_enable(level);
+		}
+
+		/* invoke callback */
+		if(uart->parent.rx_indicate != RT_NULL)
+		{
+			rt_size_t length;
+			if (uart->read_index > uart->save_index)
+				length = RT_UART_RX_BUFFER_SIZE - uart->read_index + uart->save_index;
+			else
+				length = uart->save_index - uart->read_index;
+
+			uart->parent.rx_indicate(&uart->parent, length);
+		}
+	}
+
+	return;
+}
+
+static rt_err_t rt_uart_init (rt_device_t dev)
+{
+	rt_uint32_t baud_div;
+	struct rt_uart_soc3210 *uart = (struct rt_uart_soc3210*)dev;
+
+	RT_ASSERT(uart != RT_NULL);
+
+#if 0
+	/* init UART Hardware */
+	UART_IER(uart->hw_base) = 0; /* clear interrupt */
+	UART_FCR(uart->hw_base) = 0x60; /* reset UART Rx/Tx */
+
+	/* enable UART clock */
+	/* set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */
+	UART_LCR(uart->hw_base) = 0x3;
+
+    /* set baudrate */
+	baud_div = DEV_CLK / 16 / UART_BAUDRATE;
+	UART_LCR(uart->hw_base) |= UARTLCR_DLAB;
+
+	UART_MSB(uart->hw_base) = (baud_div >> 8) & 0xff;
+	UART_LSB(uart->hw_base) = baud_div & 0xff;
+
+	UART_LCR(uart->hw_base) &= ~UARTLCR_DLAB;
+
+	/* Enable UART unit, enable and clear FIFO */
+	UART_FCR(uart->hw_base) = UARTFCR_UUE | UARTFCR_FE | UARTFCR_TFLS | UARTFCR_RFLS;
+#endif
+
+	return RT_EOK;
+}
+
+static rt_err_t rt_uart_open(rt_device_t dev, rt_uint16_t oflag)
+{
+	struct rt_uart_soc3210 *uart = (struct rt_uart_soc3210*)dev;
+
+	RT_ASSERT(uart != RT_NULL);
+	if (dev->flag & RT_DEVICE_FLAG_INT_RX)
+	{
+		/* Enable the UART Interrupt */
+		UART_IER(uart->hw_base) |= UARTIER_IRXE;
+
+		/* install interrupt */
+		rt_hw_interrupt_install(uart->irq, rt_uart_irqhandler, RT_NULL);
+		rt_hw_interrupt_umask(uart->irq);
+	}
+	return RT_EOK;
+}
+
+static rt_err_t rt_uart_close(rt_device_t dev)
+{
+	struct rt_uart_soc3210 *uart = (struct rt_uart_soc3210*)dev;
+
+	RT_ASSERT(uart != RT_NULL);
+	if (dev->flag & RT_DEVICE_FLAG_INT_RX)
+	{
+		/* Disable the UART Interrupt */
+		UART_IER(uart->hw_base) &= ~(UARTIER_IRXE);
+	}
+
+	return RT_EOK;
+}
+
+static rt_size_t rt_uart_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
+{
+	rt_uint8_t* ptr;
+	struct rt_uart_soc3210 *uart = (struct rt_uart_soc3210*)dev;
+
+	RT_ASSERT(uart != RT_NULL);
+
+	/* point to buffer */
+	ptr = (rt_uint8_t*) buffer;
+	if (dev->flag & RT_DEVICE_FLAG_INT_RX)
+	{
+		while (size)
+		{
+			/* interrupt receive */
+			rt_base_t level;
+
+			/* disable interrupt */
+			level = rt_hw_interrupt_disable();
+			if (uart->read_index != uart->save_index)
+			{
+				*ptr = uart->rx_buffer[uart->read_index];
+
+				uart->read_index ++;
+				if (uart->read_index >= RT_UART_RX_BUFFER_SIZE)
+					uart->read_index = 0;
+			}
+			else
+			{
+				/* no data in rx buffer */
+
+				/* enable interrupt */
+				rt_hw_interrupt_enable(level);
+				break;
+			}
+
+			/* enable interrupt */
+			rt_hw_interrupt_enable(level);
+
+			ptr ++;
+			size --;
+		}
+
+		return (rt_uint32_t)ptr - (rt_uint32_t)buffer;
+	}
+
+	return 0;
+}
+
+static rt_size_t rt_uart_write(rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
+{
+	char *ptr;
+	struct rt_uart_soc3210 *uart = (struct rt_uart_soc3210*)dev;
+
+	RT_ASSERT(uart != RT_NULL);
+
+	ptr = (char*)buffer;
+
+	if (dev->flag & RT_DEVICE_FLAG_STREAM)
+	{
+		/* stream mode */
+		while (size)
+		{
+			if (*ptr == '\n')
+			{
+				/* FIFO status, contain valid data */
+				while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
+				/* write data */
+				UART_DAT(uart->hw_base) = '\r';
+			}
+
+			/* FIFO status, contain valid data */
+			while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
+			/* write data */
+			UART_DAT(uart->hw_base) = *ptr;
+
+			ptr ++;
+			size --;
+		}
+	}
+	else
+	{
+		while ( size != 0 )
+		{
+			/* FIFO status, contain valid data */
+			while (!(UART_LSR(uart->hw_base) & (UARTLSR_TE | UARTLSR_TFE)));
+
+			/* write data */
+			UART_DAT(uart->hw_base) = *ptr;
+
+			ptr++;
+			size--;
+		}
+	}
+
+	return (rt_size_t) ptr - (rt_size_t) buffer;
+}
+
+void rt_hw_uart_init(void)
+{
+	struct rt_uart_soc3210* uart;
+
+	/* get uart device */
+	uart = &uart_device;
+
+	/* device initialization */
+	uart->parent.type = RT_Device_Class_Char;
+	rt_memset(uart->rx_buffer, 0, sizeof(uart->rx_buffer));
+	uart->read_index = uart->save_index = 0;
+#if defined(RT_USING_UART1)
+	uart->hw_base = UART0_BASE;
+	uart->irq = IRQ_UART0;
+#elif defined(RT_USING_UART2)
+	uart->hw_base = UART1_BASE;
+	uart->irq = IRQ_UART1;
+#endif
+
+	/* device interface */
+	uart->parent.init 	    = rt_uart_init;
+	uart->parent.open 	    = rt_uart_open;
+	uart->parent.close      = rt_uart_close;
+	uart->parent.read 	    = rt_uart_read;
+	uart->parent.write      = rt_uart_write;
+	uart->parent.control    = RT_NULL;
+	uart->parent.private    = RT_NULL;
+
+	rt_device_register(&uart->parent,
+		"uart", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STREAM | RT_DEVICE_FLAG_INT_RX);
+}
+#endif /* end of UART */
+
+/*@}*/
diff --git a/bsp/dev3210/uart.h b/bsp/dev3210/uart.h
new file mode 100644
index 0000000000000000000000000000000000000000..7b4663aa3d92aff506e26c3ef69b9657f994ae04
--- /dev/null
+++ b/bsp/dev3210/uart.h
@@ -0,0 +1,6 @@
+#ifndef __UART_H__
+#define __UART_H__
+
+void rt_hw_uart_init(void);
+
+#endif
diff --git a/examples/gui/demo_fnview.c b/examples/gui/demo_fnview.c
index 36817228618c002b2fd3173e6351a1052dfd1b3c..cac944f8a434575b377edb986a2d86cd04c539ec 100644
--- a/examples/gui/demo_fnview.c
+++ b/examples/gui/demo_fnview.c
@@ -9,6 +9,7 @@
 #include <rtgui/widgets/button.h>
 #include <rtgui/widgets/filelist_view.h>
 
+#ifdef RT_USING_DFS
 /* 用于显示选择文件名的文本标签 */
 static rtgui_label_t* label;
 /* 触发文件列表视图的按钮回调函数 */
@@ -86,3 +87,4 @@ rtgui_view_t* demo_fn_view(rtgui_workbench_t* workbench)
 
 	return view;
 }
+#endif
diff --git a/examples/gui/demo_view_image.c b/examples/gui/demo_view_image.c
index bb658377469208c41ad0532db7857d268f3a5535..55310ce02da3a95d5766e63ef06f201263ae37b6 100644
--- a/examples/gui/demo_view_image.c
+++ b/examples/gui/demo_view_image.c
@@ -12,6 +12,7 @@
 static rtgui_image_t* image = RT_NULL;
 static rtgui_view_t* _view = RT_NULL;
 
+#ifdef RT_USING_DFS
 /* 打开按钮的回调函数 */
 static void open_btn_onbutton(rtgui_widget_t* widget, struct rtgui_event* event)
 {
@@ -127,3 +128,4 @@ rtgui_view_t* demo_view_image(rtgui_workbench_t* workbench)
 
 	return _view;
 }
+#endif
diff --git a/examples/gui/demo_workbench.c b/examples/gui/demo_workbench.c
index 3595672925046a50f8388442444673913b5ddc78..30db0ef2922231bfdb05362bd48d06ad8c4e29b8 100644
--- a/examples/gui/demo_workbench.c
+++ b/examples/gui/demo_workbench.c
@@ -52,7 +52,7 @@ static void workbench_entry(void* parameter)
 
 	/* 鍒濆鍖栧悇涓緥瀛愮殑瑙嗗浘 */
 #if RT_VERSION == 4
-	demo_view_benchmark(workbench);
+	// demo_view_benchmark(workbench);
 #endif
 
 	demo_view_dc(workbench);
@@ -81,13 +81,17 @@ static void workbench_entry(void* parameter)
 	demo_view_listbox(workbench);
 	demo_view_slider(workbench);
 	demo_view_mywidget(workbench);
+#ifdef RT_USING_DFS
 	demo_view_image(workbench);
+#endif
 #ifdef RT_USING_MODULE	
 	demo_view_module(workbench);
 #endif
 	demo_listview_view(workbench);
 	demo_listview_icon_view(workbench);
+#ifdef RT_USING_DFS
 	demo_fn_view(workbench);
+#endif
 
 	/* 鏄剧ず瑙嗗浘 */
 	demo_view_show();
diff --git a/libcpu/SConscript b/libcpu/SConscript
index 19487d7f8122787f88f958e70ad28eb51ff81e64..bd854aa5f7ac1c59cdbe4f660a96dbfd046e2763 100644
--- a/libcpu/SConscript
+++ b/libcpu/SConscript
@@ -21,7 +21,7 @@ group = {}
 group['name'] = rtconfig.CPU.upper()
 group['src'] = File(src_local)
 group['CCFLAGS'] = ''
-group['CPPPATH'] = [RTT_ROOT + '/libcpu/' + rtconfig.ARCH + '/' + rtconfig.CPU]
+group['CPPPATH'] = [RTT_ROOT + '/libcpu/' + rtconfig.ARCH + '/' + rtconfig.CPU, RTT_ROOT + '/libcpu/' + rtconfig.ARCH + '/common']
 group['CPPDEFINES'] = ''
 group['LINKFLAGS'] = ''
 
diff --git a/libcpu/mips/common/exception.h b/libcpu/mips/common/exception.h
index 07ffcd7a293b678f1125ddb8f21cdff8f0092faf..cd776a77cb3c1d66e0f7e0ec600a46c06c98f464 100644
--- a/libcpu/mips/common/exception.h
+++ b/libcpu/mips/common/exception.h
@@ -140,8 +140,6 @@
 
 #define GDB_FR_SIZE			((((GDB_FR_CP0_PRID) + LONGSIZE) + (PTRSIZE-1)) & ~(PTRSIZE-1))
 
-
-
 /*
  * This is the same as above, but for the high-level
  * part of the INT stub.
@@ -161,7 +159,7 @@ typedef struct pt_regs_s
 
 typedef void (* exception_func_t)(pt_regs_t *regs);
 
-extern exception_func_t sys_exception_handlers[33];
+extern exception_func_t sys_exception_handlers[];
 exception_func_t rt_set_except_vector(int n, exception_func_t func);
 void install_default_execpt_handle(void);
 
diff --git a/libcpu/mips/common/mips.inc b/libcpu/mips/common/mips.inc
index 59388fd7f1f4df9e5c258de66ce7524cfa1406fe..c1e3e2d4185124cda361d99466da0bfdcc822fb4 100644
--- a/libcpu/mips/common/mips.inc
+++ b/libcpu/mips/common/mips.inc
@@ -14,15 +14,15 @@
 #ifndef __MIPS_INC__
 #define __MIPS_INC__
 
-#define zero    $0
-#define at      $1
-#define v0      $2
+#define zero    $0		/* wired zero */
+// #define at      $1
+#define v0      $2		/* return value */
 #define v1      $3
-#define a0      $4
+#define a0      $4		/* argument registers */
 #define a1      $5
 #define a2      $6
 #define a3      $7
-#define t0      $8
+#define t0      $8		/* caller saved */
 #define t1      $9
 #define t2      $10
 #define t3      $11
@@ -30,7 +30,7 @@
 #define t5      $13
 #define t6      $14
 #define t7      $15
-#define s0      $16
+#define s0      $16		/* callee saved */
 #define s1      $17
 #define s2      $18
 #define s3      $19
@@ -38,14 +38,15 @@
 #define s5      $21
 #define s6      $22
 #define s7      $23
-#define t8      $24
+#define t8      $24		/* caller saved */
 #define t9      $25
-#define k0      $26
+#define jp      $25     /* PIC jump register */
+#define k0      $26     /* kernel scratch */
 #define k1      $27
-#define gp      $28
-#define sp      $29
-#define fp      $30
-#define ra      $31
-
+#define gp      $28     /* global pointer */
+#define sp      $29     /* stack pointer */
+#define fp      $30     /* frame pointer */
+#define s8		$30		/* same like fp! */
+#define ra      $31     /* return address */
 
 #endif /* end of __MIPS_INC__   */
diff --git a/libcpu/mips/loongson/cache.c b/libcpu/mips/loongson/cache.c
new file mode 100644
index 0000000000000000000000000000000000000000..bca01a61f40404bf2ea2f146334970aedad7d6e5
--- /dev/null
+++ b/libcpu/mips/loongson/cache.c
@@ -0,0 +1,188 @@
+#include "../common/mipsregs.h"
+#include "cache.h"
+
+#define K0BASE			0x80000000
+#define PRID_3210I 		0x4200
+
+typedef struct cacheinfo_t {
+	unsigned int	icache_size;
+	unsigned int	dcache_size;
+	unsigned int	icacheline_size;
+	unsigned int	dcacheline_size;
+} cacheinfo_t ;
+
+typedef struct cacheop_t {
+	void (*Clear_TagLo) (void);
+	void (*Invalidate_Icache) (unsigned int);
+	void (*Invalidate_Dcache_Fill) (unsigned int);
+	void (*Invalidate_Dcache_ClearTag) (unsigned int);
+	void (*Init_Cache)(void);
+} cacheop_t ;
+
+static cacheop_t cacheop, *pcacheop;
+static cacheinfo_t cacheinfo, *pcacheinfo;
+
+int identify_cpu (void)
+{
+    unsigned int cpu_id;
+    void invalidate_cache (void);
+
+    pcacheop = &cacheop;
+    pcacheinfo = &cacheinfo;
+
+	rt_kprintf("CPU configure: 0x%08x\n", read_c0_config());
+    cpu_id = read_c0_prid();
+    switch (cpu_id)
+	{
+	case PRID_3210I: 
+	    rt_kprintf ("CPU:SoC3210\n");
+	    pcacheop->Clear_TagLo = Clear_TagLo;
+	    pcacheop->Invalidate_Icache = Invalidate_Icache_Gc3210I;
+	    pcacheop->Invalidate_Dcache_Fill = Invalidate_Dcache_Fill_Gc3210I;
+	    pcacheop->Invalidate_Dcache_ClearTag = Invalidate_Dcache_ClearTag_Gc3210I;
+	    break;
+	default:
+	    rt_kprintf ("Unknown CPU type, system halted!\n");
+	    while (1) {}
+	    break;
+    }
+
+    return 0;
+}
+
+void probe_cache(void)
+{
+    unsigned int config = read_c0_config ();
+    unsigned int icache_size, ic_lsize;
+    unsigned int dcache_size, dc_lsize;
+
+    icache_size = 1 << (12 + ((config >> 9) & 7)); 
+    dcache_size = 1 << (12 + ((config >> 6) & 7));
+    ic_lsize = 16 << ((config >> 5) & 1);
+    dc_lsize = 16 << ((config >> 4) & 1);
+
+    rt_kprintf("DCache %2dkb, linesize %d bytes.\n",
+	    dcache_size >> 10, dc_lsize);
+    rt_kprintf("ICache %2dkb, linesize %d bytes.\n",
+	    icache_size >> 10, ic_lsize);
+
+    pcacheinfo->icache_size = icache_size;
+    pcacheinfo->dcache_size = dcache_size;
+    pcacheinfo->icacheline_size = ic_lsize;
+    pcacheinfo->dcacheline_size = dc_lsize;
+
+    return ;
+}
+
+void invalidate_writeback_dcache_all(void)
+{
+	unsigned int start = K0BASE;
+	unsigned int end = (start + pcacheinfo->dcache_size);
+
+	start = K0BASE;
+	while(start < end) {
+		Writeback_Invalidate_Dcache(start);  //hit writeback invalidate 
+		start += pcacheinfo->dcacheline_size;
+	}
+}
+
+void invalidate_writeback_dcache(unsigned long addr, int size)
+{
+	unsigned long start, end;
+			
+	start = (addr +pcacheinfo->dcacheline_size -1) & (- pcacheinfo->dcacheline_size);
+	end = (end + size + pcacheinfo->dcacheline_size -1) & ( -pcacheinfo->dcacheline_size);
+	
+	while(start <end){
+		Writeback_Invalidate_Dcache(start);
+		start += pcacheinfo->dcacheline_size;
+	}		
+}
+
+
+void invalidate_icache_all(void)
+{
+	unsigned int start = K0BASE;
+	unsigned int end = (start + pcacheinfo->icache_size);
+
+	while(start < end) {
+		pcacheop->Invalidate_Icache(start); 
+		start += pcacheinfo->icacheline_size;
+	}
+}
+
+void invalidate_dcache_all()
+{ 
+	unsigned int start = K0BASE;
+	unsigned int end  = (start + pcacheinfo->dcache_size);
+	while(start <end){
+		Invalidate_Dcache_Fill_Gc3210I(start);
+		start += pcacheinfo->icacheline_size;
+	}
+}
+
+//with cache disabled
+void init_dcache(void)
+{
+	unsigned int start = K0BASE;
+	unsigned int end = (start + pcacheinfo->dcache_size);
+
+	while(start < end){
+		pcacheop->Invalidate_Dcache_ClearTag(start);
+		start += pcacheinfo->dcacheline_size;
+	}
+
+}
+
+void rt_hw_cache_init(void)
+{
+    unsigned int start, end;
+	
+	/* 1. identify cpu and probe cache */
+	identify_cpu();
+	probe_cache();
+
+	start = K0BASE;
+	end = (start + pcacheinfo->icache_size);
+
+    /*
+     *	2. clear CP0 taglo/taghi register;
+     */
+    pcacheop->Clear_TagLo();
+
+	/*
+     *	3. invalidate instruction cache;
+     */
+    while(start < end) {
+		pcacheop->Invalidate_Icache(start); //index invalidate icache 
+		start += pcacheinfo->icacheline_size;
+    }
+
+    /*
+     *	4. invalidate data cache;
+     */
+    start = K0BASE;
+    end = (start + pcacheinfo->dcache_size);
+    while(start < end) {
+		pcacheop->Invalidate_Dcache_ClearTag(start); 
+		start += pcacheinfo->dcacheline_size;
+    }
+
+    start = K0BASE;
+    while(start < end) {
+		pcacheop->Invalidate_Dcache_Fill(start);  //index invalidate dcache
+		start += pcacheinfo->dcacheline_size;
+    }
+
+    start = K0BASE;
+    while(start < end) {
+		pcacheop->Invalidate_Dcache_ClearTag(start); 
+		start += pcacheinfo->dcacheline_size;
+    }
+
+	/* enable cache */
+	enable_cpu_cache();
+	rt_kprintf("enable cpu cache done\n");
+
+	return ;
+}
diff --git a/libcpu/mips/loongson/cache.h b/libcpu/mips/loongson/cache.h
new file mode 100644
index 0000000000000000000000000000000000000000..fb4899a6b294095e364c41a5ff4d5fcaefe3e531
--- /dev/null
+++ b/libcpu/mips/loongson/cache.h
@@ -0,0 +1,47 @@
+#ifndef	__CACHE_H__
+#define	__CACHE_H__
+
+/*
+ * Cache Operations
+ */
+#define Index_Invalidate_I      0x00
+#define Index_Writeback_Inv_D   0x01
+#define Index_Invalidate_SI     0x02
+#define Index_Writeback_Inv_SD  0x03
+#define Index_Load_Tag_I		0x04
+#define Index_Load_Tag_D		0x05
+#define Index_Load_Tag_SI		0x06
+#define Index_Load_Tag_SD		0x07
+#define Index_Store_Tag_I		0x08
+#define Index_Store_Tag_D		0x09
+#define Index_Store_Tag_SI		0x0A
+#define Index_Store_Tag_SD		0x0B
+#define Create_Dirty_Excl_D		0x0d
+#define Create_Dirty_Excl_SD	0x0f
+#define Hit_Invalidate_I		0x10
+#define Hit_Invalidate_D		0x11
+#define Hit_Invalidate_SI		0x12
+#define Hit_Invalidate_SD		0x13
+#define Fill					0x14
+#define Hit_Writeback_Inv_D		0x15
+/* 0x16 is unused */
+#define Hit_Writeback_Inv_SD	0x17
+#define Hit_Writeback_I			0x18
+#define Hit_Writeback_D			0x19
+/* 0x1a is unused */
+#define Hit_Writeback_SD		0x1b
+/* 0x1c is unused */
+/* 0x1e is unused */
+#define Hit_Set_Virtual_SI		0x1e
+#define Hit_Set_Virtual_SD		0x1f
+
+extern void Clear_TagLo (void);
+
+extern void Invalidate_Icache_Gc3210I (unsigned int);
+extern void Invalidate_Dcache_ClearTag_Gc3210I (unsigned int);
+extern void Invalidate_Dcache_Fill_Gc3210I(unsigned int);
+extern void Writeback_Invalidate_Dcache(unsigned int);
+
+void rt_hw_cache_init(void);
+
+#endif
diff --git a/libcpu/mips/loongson/cache_gcc.S b/libcpu/mips/loongson/cache_gcc.S
new file mode 100644
index 0000000000000000000000000000000000000000..00fd861eec3ea800e8ac3398a32e4ef0c7ed04bb
--- /dev/null
+++ b/libcpu/mips/loongson/cache_gcc.S
@@ -0,0 +1,202 @@
+#include "../common/mipsregs.h"
+#include "../common/mips.inc"
+#include "../common/asm.h"
+#include "cache.inc"
+
+	.ent	cache_init
+    .global cache_init
+    .set noreorder
+cache_init:
+        move t1,ra
+####part 2####
+cache_detect_4way:
+        mfc0    t4, CP0_CONFIG
+        andi    t5, t4, 0x0e00
+        srl     t5, t5, 9     #ic
+        andi    t6, t4, 0x01c0
+        srl     t6, t6, 6     #dc
+        addiu   t8, $0, 1
+        addiu   t9, $0, 2
+                                #set dcache way
+        beq     t6, $0,  cache_d1way
+        addiu   t7, $0, 1       #1 way
+        beq     t6, t8,  cache_d2way
+        addiu   t7, $0, 2       #2 way
+        beq     $0, $0, cache_d4way
+        addiu   t7, $0, 4       #4 way
+cache_d1way:
+        beq     $0, $0, 1f
+        addiu   t6, t6, 12      #1 way
+cache_d2way:
+        beq     $0, $0, 1f
+        addiu   t6, t6, 11      #2 way
+cache_d4way:
+        addiu   t6, t6, 10      #4 way (10), 2 way(11), 1 way(12)
+1:                              #set icache way
+        beq     t5, $0,  cache_i1way
+        addiu   t3, $0, 1       #1 way
+        beq     t5, t8,  cache_i2way
+        addiu   t3, $0, 2       #2 way
+        beq     $0, $0, cache_i4way
+        addiu   t3, $0, 4       #4 way
+cache_i1way:
+        beq     $0, $0, 1f
+        addiu   t5, t5, 12
+cache_i2way:
+        beq     $0, $0, 1f
+        addiu   t5, t5, 11
+cache_i4way:
+        addiu   t5, t5, 10      #4 way (10), 2 way(11), 1 way(12)
+
+1:      addiu   t4, $0, 1
+        sllv    t6, t4, t6
+        sllv    t5, t4, t5
+#if 0
+    la	t0, memvar
+	sw	t7, 0x0(t0) #ways
+	sw	t5, 0x4(t0) #icache size
+	sw	t6, 0x8(t0) #dcache size
+#endif
+####part 3####
+	.set	mips3
+	lui	a0, 0x8000
+	addu	a1, $0, t5
+	addu	a2, $0, t6
+cache_init_d2way:
+#a0=0x80000000, a1=icache_size, a2=dcache_size
+#a3, v0 and v1 used as local registers
+	mtc0	$0, CP0_TAGHI
+	addu	v0, $0, a0
+	addu	v1, a0, a2
+1:	slt	a3, v0, v1
+	beq	a3, $0, 1f
+	nop
+	mtc0	$0, CP0_TAGLO
+	beq	t7, 1, 4f
+	cache	Index_Store_Tag_D, 0x0(v0)	# 1 way
+	beq	t7, 2 ,4f
+	cache	Index_Store_Tag_D, 0x1(v0)	# 2 way
+	cache	Index_Store_Tag_D, 0x2(v0)	# 4 way
+	cache	Index_Store_Tag_D, 0x3(v0)
+4:	beq	$0, $0, 1b
+	addiu	v0, v0, 0x20
+1:
+cache_flush_i2way:
+	addu	v0, $0, a0
+	addu	v1, a0, a1
+1:	slt	a3, v0, v1
+	beq	a3, $0, 1f
+	nop
+	beq	t3, 1, 4f
+	cache	Index_Invalidate_I, 0x0(v0)	# 1 way
+	beq	t3, 2, 4f
+	cache	Index_Invalidate_I, 0x1(v0)	# 2 way
+	cache	Index_Invalidate_I, 0x2(v0)
+	cache	Index_Invalidate_I, 0x3(v0)	# 4 way
+4:	beq	$0, $0, 1b
+	addiu	v0, v0, 0x20
+1:
+cache_flush_d2way:
+	addu	v0, $0, a0
+	addu	v1, a0, a2
+1:	slt	a3, v0, v1
+	beq	a3, $0, 1f
+	nop
+	beq	t7, 1, 4f
+	cache	Index_Writeback_Inv_D, 0x0(v0) 	#1 way
+	beq	t7, 2, 4f
+	cache	Index_Writeback_Inv_D, 0x1(v0)	# 2 way
+	cache	Index_Writeback_Inv_D, 0x2(v0)
+	cache	Index_Writeback_Inv_D, 0x3(v0)	# 4 way
+4:	beq	$0, $0, 1b
+	addiu	v0, v0, 0x20
+1:
+cache_init_finish:
+	jr	t1
+    nop
+    .set reorder
+	.end cache_init
+
+###########################
+#  Enable CPU cache       #
+###########################
+
+LEAF(enable_cpu_cache)
+	.set noreorder
+	mfc0	t0, CP0_CONFIG
+	nop
+	and		t0, ~0x03
+	or		t0, 0x03
+	mtc0	t0, CP0_CONFIG
+	nop
+	.set reorder
+	j	ra
+END (enable_cpu_cache)
+    
+###########################
+#  disable CPU cache      #
+###########################
+
+LEAF(disable_cpu_cache)
+	.set noreorder
+	mfc0	t0, CP0_CONFIG
+	nop
+	and		t0, ~0x03
+	or 		t0, 0x2
+	mtc0	t0, CP0_CONFIG
+	nop
+	.set reorder
+	j	ra
+END (disable_cpu_cache)
+
+/**********************************/
+/* Invalidate Instruction Cache	  */
+/**********************************/
+LEAF(Clear_TagLo)
+	.set 	noreorder
+	mtc0	zero, CP0_TAGLO
+	nop
+	.set 	reorder
+	j		ra
+END(Clear_TagLo)
+
+    .set mips3
+/**********************************/
+/* Invalidate Instruction Cache	  */
+/**********************************/
+LEAF(Invalidate_Icache_Gc3210I)
+	.set	noreorder
+	cache	Index_Invalidate_I,0(a0)
+	cache	Index_Invalidate_I,1(a0)
+	cache	Index_Invalidate_I,2(a0)
+	cache	Index_Invalidate_I,3(a0)
+	.set	reorder
+	j		ra
+END(Invalidate_Icache_Gc3210I)
+
+/**********************************/
+/* Invalidate Data Cache		  */
+/**********************************/
+LEAF(Invalidate_Dcache_ClearTag_Gc3210I)
+	.set	noreorder
+	cache	Index_Store_Tag_D, 0(a0)	# BDSLOT: clear tag
+	cache	Index_Store_Tag_D, 1(a0)	# BDSLOT: clear tag
+	.set	reorder
+	j		ra
+END(Invalidate_Dcache_ClearTag_Gc3210I)
+
+LEAF(Invalidate_Dcache_Fill_Gc3210I)
+	.set	noreorder
+	cache	Index_Writeback_Inv_D, 0(a0)	# BDSLOT: clear tag
+	cache	Index_Writeback_Inv_D, 1(a0)	# BDSLOT: clear tag
+	.set	reorder
+	j		ra
+END(Invalidate_Dcache_Fill_Gc3210I)
+
+LEAF(Writeback_Invalidate_Dcache)
+	.set noreorder
+	cache	Hit_Writeback_Inv_D, (a0)
+	.set reorder
+	j	ra
+END(Writeback_Invalidate_Dcache)
+    .set mips0
diff --git a/libcpu/mips/loongson/context_gcc.S b/libcpu/mips/loongson/context_gcc.S
new file mode 100644
index 0000000000000000000000000000000000000000..1611f1cd86e2a2006ca398774668b6dc268411ca
--- /dev/null
+++ b/libcpu/mips/loongson/context_gcc.S
@@ -0,0 +1,141 @@
+/*
+ * File      : context_gcc.S
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-17     swkyer       first version
+ * 2010-09-11     bernard      port to Loongson SoC3210
+ */
+#include "../common/mips.inc"
+#include "../common/stackframe.h"
+#include "soc3210.h"
+
+    .section ".text", "ax"
+    .set noreorder
+
+/*
+ * rt_base_t rt_hw_interrupt_disable()
+ */
+    .globl rt_hw_interrupt_disable
+rt_hw_interrupt_disable:
+    mfc0    v0, CP0_STATUS
+    and     v1, v0, 0xfffffffe
+    mtc0    v1, CP0_STATUS
+    jr      ra
+    nop
+
+/*
+ * void rt_hw_interrupt_enable(rt_base_t level)
+ */
+    .globl rt_hw_interrupt_enable
+rt_hw_interrupt_enable:
+    mtc0    a0, CP0_STATUS
+    jr      ra
+    nop
+
+/*
+ * void rt_hw_context_switch(rt_uint32 from, rt_uint32 to)
+ * a0 --> from
+ * a1 --> to
+ */
+    .globl rt_hw_context_switch
+rt_hw_context_switch:
+    mtc0    ra, CP0_EPC
+    SAVE_ALL
+
+    sw      sp, 0(a0)       /* store sp in preempted tasks TCB */
+    lw      sp, 0(a1)       /* get new task stack pointer */
+
+    RESTORE_ALL_AND_RET
+
+/*
+ * void rt_hw_context_switch_to(rt_uint32 to)/*
+ * a0 --> to
+ */
+    .globl rt_hw_context_switch_to
+rt_hw_context_switch_to:
+    lw      sp, 0(a0)       /* get new task stack pointer */
+
+    RESTORE_ALL_AND_RET
+
+/*
+ * void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to)/*
+ */
+    .globl rt_thread_switch_interrput_flag
+    .globl rt_interrupt_from_thread
+    .globl rt_interrupt_to_thread
+    .globl rt_hw_context_switch_interrupt
+rt_hw_context_switch_interrupt:
+    la      t0, rt_thread_switch_interrput_flag
+    lw      t1, 0(t0)
+    nop
+    bnez    t1, _reswitch
+    nop
+    li      t1, 0x01                       /* set rt_thread_switch_interrput_flag to 1 */
+    sw      t1, 0(t0)
+    la      t0, rt_interrupt_from_thread   /* set rt_interrupt_from_thread */
+    sw      a0, 0(t0)
+_reswitch:
+    la      t0, rt_interrupt_to_thread     /* set rt_interrupt_to_thread */
+    sw      a1, 0(t0)
+    jr      ra
+    nop
+
+/*
+ * void rt_hw_context_switch_interrupt_do(rt_base_t flag)
+ */
+    .globl rt_interrupt_enter
+    .globl rt_interrupt_leave
+    .globl mips_irq_handle
+mips_irq_handle:
+    SAVE_ALL
+
+    mfc0    t0, CP0_CAUSE
+    and     t1, t0, 0xff
+	bnez	t1, spurious_interrupt		/* check exception */
+	nop
+
+	/* let k0 keep the current context sp */
+    move    k0, sp 
+    /* switch to kernel stack */
+    li      sp, SYSTEM_STACK
+
+    jal     rt_interrupt_enter
+    nop
+    jal     rt_interrupt_dispatch
+    nop
+    jal     rt_interrupt_leave
+    nop
+
+    /* switch sp back to thread's context */
+    move    sp, k0
+
+    /*
+     * if rt_thread_switch_interrput_flag set, jump to
+     * rt_hw_context_switch_interrupt_do and don't return
+     */
+    la      k0, rt_thread_switch_interrput_flag
+    lw      k1, 0(k0)
+    beqz    k1, spurious_interrupt
+    nop
+    sw      zero, 0(k0)                     /* clear flag */
+	nop
+
+    /*
+     * switch to the new thread
+     */
+    la      k0, rt_interrupt_from_thread
+    lw      k1, 0(k0)
+    nop
+    sw      sp, 0(k1)                       /* store sp in preempted tasks's TCB */
+
+    la      k0, rt_interrupt_to_thread
+    lw      k1, 0(k0)
+    nop
+    lw      sp, 0(k1)                       /* get new task's stack pointer */
+    j       spurious_interrupt
+    nop
+
+spurious_interrupt:
+    RESTORE_ALL_AND_RET
+
+    .set reorder
diff --git a/libcpu/mips/loongson/cpu.c b/libcpu/mips/loongson/cpu.c
new file mode 100644
index 0000000000000000000000000000000000000000..06673bcbb9e008901c2d91856f56b71bd0072248
--- /dev/null
+++ b/libcpu/mips/loongson/cpu.c
@@ -0,0 +1,49 @@
+/*
+ * File      : cpu.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2010, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-07-09     Bernard      first version
+ * 2010-09-11     Bernard      add CPU reset implementation
+ */
+#include <rtthread.h>
+#include <soc3210.h>
+
+/**
+ * @addtogroup Loogonson SoC3210
+ */
+/*@{*/
+
+/**
+ * this function will reset CPU
+ *
+ */
+void rt_hw_cpu_reset()
+{
+	/* open the watch-dog */
+	WD_TIMER = 0x01; /* watch dog will be timeout after 1 tick */
+	WD_CTRL |= 0x01;
+
+	rt_kprintf("reboot system...\n");
+	while (1);
+}
+
+/**
+ * this function will shutdown CPU
+ *
+ */
+void rt_hw_cpu_shutdown()
+{
+	rt_kprintf("shutdown...\n");
+
+	while (1);
+}
+
+/*@}*/
+
diff --git a/libcpu/mips/loongson/exception.c b/libcpu/mips/loongson/exception.c
new file mode 100644
index 0000000000000000000000000000000000000000..77d1414a29a79ab9f92ba39f16f63eb08a5d6396
--- /dev/null
+++ b/libcpu/mips/loongson/exception.c
@@ -0,0 +1,83 @@
+/*
+ * File      : exception.c
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-17     swkyer       first version
+ */
+#include <rtthread.h>
+#include <rthw.h>
+#include "../common/exception.h"
+#include "../common/mipsregs.h"
+
+/**
+ * @addtogroup SoC3210
+ */
+/*@{*/
+
+/**
+ * exception handle table
+ */
+#define RT_EXCEPTION_MAX	8
+exception_func_t sys_exception_handlers[RT_EXCEPTION_MAX];
+
+/**
+ * setup the exception handle
+ */
+exception_func_t rt_set_except_vector(int n, exception_func_t func)
+{
+    exception_func_t old_handler = sys_exception_handlers[n];
+
+    if ((n == 0) || (n > RT_EXCEPTION_MAX) || (!func))
+    {
+        return 0;
+    }
+
+    sys_exception_handlers[n] = func;
+
+    return old_handler;
+}
+
+void tlb_refill_handler(void)
+{
+	rt_kprintf("tlb-miss happens, epc: 0x%08x\n", read_c0_epc());
+	rt_hw_cpu_shutdown();
+}
+
+void cache_error_handler(void)
+{
+	rt_kprintf("cache exception happens, epc: 0x%08x\n", read_c0_epc());
+	rt_hw_cpu_shutdown();
+}
+
+static void unhandled_exception_handle(pt_regs_t *regs)
+{
+	rt_kprintf("exception happens, epc: 0x%08x, cause: 0x%08x\n", regs->cp0_epc, read_c0_cause());
+}
+
+void install_default_execpt_handle(void)
+{
+	rt_int32_t i;
+
+	for (i=0; i<RT_EXCEPTION_MAX; i++)
+		sys_exception_handlers[i] = (exception_func_t)unhandled_exception_handle;
+}
+
+void exception_handler(pt_regs_t *regs)
+{
+	rt_uint32_t cause;
+	rt_uint32_t index;
+
+	cause = (read_c0_cause() & read_c0_config());
+	cause = (cause & 0xfc00) >> 8;
+
+	for (index = RT_EXCEPTION_MAX; index > 0; index --)
+	{
+		if (cause & (1 << index))
+		{
+			sys_exception_handlers[index](regs);
+			cause &= ~(1 << index);
+		}
+	}
+}
+
+/*@}*/
diff --git a/libcpu/mips/loongson/interrupt.c b/libcpu/mips/loongson/interrupt.c
new file mode 100644
index 0000000000000000000000000000000000000000..2d354269aa079aa2e1f485073f9ecd23be802ed9
--- /dev/null
+++ b/libcpu/mips/loongson/interrupt.c
@@ -0,0 +1,129 @@
+/*
+ * File      : interrupt.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2010, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-10-15     Bernard      first version
+ */
+#include <rtthread.h>
+#include "soc3210.h"
+
+#define MAX_INTR 32
+
+extern rt_uint32_t rt_interrupt_nest;
+rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
+rt_uint32_t rt_thread_switch_interrput_flag;
+
+static rt_isr_handler_t irq_handle_table[MAX_INTR];
+void rt_interrupt_dispatch(void *ptreg);
+void rt_hw_timer_handler();
+
+/**
+ * @addtogroup Loogonson SoC3210
+ */
+/*@{*/
+
+void rt_hw_interrupt_handler(int vector)
+{
+	rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
+}
+
+/**
+ * This function will initialize hardware interrupt
+ */
+void rt_hw_interrupt_init()
+{
+	rt_int32_t index;
+
+	for (index = 0; index < MAX_INTR; index ++)
+	{
+		irq_handle_table[index] = (rt_isr_handler_t)rt_hw_interrupt_handler;
+	}
+
+	/* init interrupt nest, and context in thread sp */
+	rt_interrupt_nest = 0;
+	rt_interrupt_from_thread = 0;
+	rt_interrupt_to_thread = 0;
+	rt_thread_switch_interrput_flag = 0;
+}
+
+/**
+ * This function will mask a interrupt.
+ * @param vector the interrupt number
+ */
+void rt_hw_interrupt_mask(int vector)
+{
+	/* mask interrupt */
+	INT_EN &= ~(1 << vector);
+}
+
+/**
+ * This function will un-mask a interrupt.
+ * @param vector the interrupt number
+ */
+void rt_hw_interrupt_umask(int vector)
+{
+	INT_EN |= (1 << vector);
+}
+
+/**
+ * This function will install a interrupt service routine to a interrupt.
+ * @param vector the interrupt number
+ * @param new_handler the interrupt service routine to be installed
+ * @param old_handler the old interrupt service routine
+ */
+void rt_hw_interrupt_install(int vector, rt_isr_handler_t new_handler, rt_isr_handler_t *old_handler)
+{
+	if (vector >= 0 && vector < MAX_INTR)
+	{
+		if (old_handler != RT_NULL)
+			*old_handler = irq_handle_table[vector];
+		if (new_handler != RT_NULL)
+			irq_handle_table[vector] = (rt_isr_handler_t)new_handler;
+	}
+}
+
+void rt_interrupt_dispatch(void *ptreg)
+{
+    int i;
+	rt_isr_handler_t irq_func;
+	static rt_uint32_t status = 0;
+	rt_uint32_t c0_status;
+
+	/* check os timer */
+	c0_status = read_c0_status();
+	if (c0_status & 0x8000)
+	{
+		rt_hw_timer_handler();
+	}
+
+	if (c0_status & 0x0400)
+	{
+		/* the hardware interrupt */
+		status |= INT_ISR;
+		if (!status) return;
+
+		for (i = MAX_INTR; i > 0; --i)
+		{
+			if ((status & (1<<i)))
+			{
+				status &= ~(1<<i);
+				irq_func = irq_handle_table[i];
+
+				/* do interrupt */
+				(*irq_func)(i);
+
+				/* ack interrupt */
+				INT_CLR = (1 << i);
+			}
+		}
+	}
+}
+
+/*@}*/
diff --git a/libcpu/mips/loongson/mipscfg.c b/libcpu/mips/loongson/mipscfg.c
new file mode 100644
index 0000000000000000000000000000000000000000..89bb321c8c8b08467d8d6617d5662155a3a1afb5
--- /dev/null
+++ b/libcpu/mips/loongson/mipscfg.c
@@ -0,0 +1,82 @@
+/*
+ * File      : mipscfg.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2010, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-27     swkyer       first version
+ */
+#include <rtthread.h>
+#include "../common/mipsregs.h"
+#include "../common/mipscfg.h"
+
+mips32_core_cfg_t g_mips_core =
+{
+	16,		/* icache_line_size */
+	256,	/* icache_lines_per_way */
+	4,		/* icache_ways */
+	16,		/* dcache_line_size */
+	256,	/* dcache_lines_per_way */
+	4,		/* dcache_ways */
+	16,		/* max_tlb_entries */
+};
+
+static rt_uint16_t m_pow(rt_uint16_t b, rt_uint16_t n)
+{
+	rt_uint16_t rets = 1;
+
+    while (n--)
+        rets *= b;
+
+    return rets;
+}
+
+static rt_uint16_t m_log2(rt_uint16_t b)
+{
+	rt_uint16_t rets = 0;
+
+    while (b != 1)
+    {
+        b /= 2;
+        rets++;
+    }
+
+    return rets;
+}
+
+/**
+ * read core attribute
+ */
+void mips32_cfg_init(void)
+{
+	rt_uint16_t val;
+	rt_uint32_t cp0_config1;
+
+	cp0_config1 = read_c0_config();
+	if (cp0_config1 & 0x80000000)
+	{
+		cp0_config1 = read_c0_config1();
+
+		val = (cp0_config1 & (7<<22))>>22;
+		g_mips_core.icache_lines_per_way = 64 * m_pow(2, val);
+		val = (cp0_config1 & (7<<19))>>19;
+		g_mips_core.icache_line_size = 2 * m_pow(2, val);
+		val = (cp0_config1 & (7<<16))>>16;
+		g_mips_core.icache_ways = val + 1;
+
+		val = (cp0_config1 & (7<<13))>>13;
+		g_mips_core.dcache_lines_per_way = 64 * m_pow(2, val);
+		val = (cp0_config1 & (7<<10))>>10;
+		g_mips_core.dcache_line_size = 2 * m_pow(2, val);
+		val = (cp0_config1 & (7<<7))>>7;
+		g_mips_core.dcache_ways = val + 1;
+
+		val = (cp0_config1 & (0x3F<<25))>>25;
+		g_mips_core.max_tlb_entries = val + 1;
+	}
+}
diff --git a/libcpu/mips/loongson/soc3210.h b/libcpu/mips/loongson/soc3210.h
new file mode 100644
index 0000000000000000000000000000000000000000..fe394ce0125e4eb1983214c21224894e09e2d3be
--- /dev/null
+++ b/libcpu/mips/loongson/soc3210.h
@@ -0,0 +1,172 @@
+#ifndef __SOC3210_H__
+#define __SOC3210_H__
+
+#include "../common/mipsregs.h"
+
+/* registers */
+#define __REG8(addr)		*((volatile unsigned char *)(addr))
+#define __REG16(addr)		*((volatile unsigned short *)(addr))
+#define __REG32(addr)		*((volatile unsigned int *)(addr))
+
+#define EMI_BASE			0xBF000000
+#define NN_BASE				0xBF000040
+#define LCD_BASE			0xBF001000
+#define HSB_MISC_BASE		0xBF003200
+#define SPI_BASE			0xBF004000
+#define PS2_BASE			0xBF004040
+#define UART0_BASE			0xBF004080
+#define UART1_BASE			0xBF004090
+#define I2C_BASE			0xBF0040D0
+#define LPB_MISC_BASE		0xBF004100
+#define AC97_BASE			0xBF004200
+#define AC97_DMA_BASE		0xBF004280
+#define CAN1_BASE			0xBF004300
+#define CAN0_BASE			0xBF004400
+#define MAC0_BASE			0xBF005200
+#define MAC1_BASE			0xBF005300
+
+/* LCD registers */
+#define LCD_CTRL			__REG32(LCD_BASE + 0x000)
+#define LCD_STAT			__REG32(LCD_BASE + 0x004)
+#define LCD_HTIM			__REG32(LCD_BASE + 0x008)
+#define LCD_VTIM			__REG32(LCD_BASE + 0x00C)
+#define LCD_HVLEN			__REG32(LCD_BASE + 0x010)
+#define LCD_VBARA			__REG32(LCD_BASE + 0x014)
+#define LCD_VBARB			__REG32(LCD_BASE + 0x018)
+#define LCD_PCLT			__REG32(LCD_BASE + 0x800)
+
+/* HSB misc registers */
+#define HSB_MISC_REG		__REG32(HSB_MISC_BASE + 0x00)
+#define INT_EDGE			__REG32(HSB_MISC_BASE + 0x04)
+#define INT_STEER			__REG32(HSB_MISC_BASE + 0x08)
+#define INT_POL				__REG32(HSB_MISC_BASE + 0x0C)
+#define INT_SET				__REG32(HSB_MISC_BASE + 0x10)
+#define INT_CLR				__REG32(HSB_MISC_BASE + 0x14)
+#define INT_EN				__REG32(HSB_MISC_BASE + 0x18)
+#define INT_ISR				__REG32(HSB_MISC_BASE + 0x1C)
+#define GPIO_OE_60_29		__REG32(HSB_MISC_BASE + 0x20)
+#define GPIO_I_60_29		__REG32(HSB_MISC_BASE + 0x24)
+#define GPIO_O_60_29		__REG32(HSB_MISC_BASE + 0x28)
+#define HSB_ARB_CFG			__REG32(HSB_MISC_BASE + 0x2C)
+#define WD_TIMER			__REG32(HSB_MISC_BASE + 0x30)
+#define WD_CTRL				__REG32(HSB_MISC_BASE + 0x34)
+
+/* SPI registers */
+#define SPI_SPCR			__REG8(SPI_BASE + 0x00)
+#define SPI_SPSR			__REG8(SPI_BASE + 0x01)
+#define SPI_TX_FIFO			__REG8(SPI_BASE + 0x02)
+#define SPI_SPER			__REG8(SPI_BASE + 0x03)
+
+/* PS/2 registers */
+#define PS2_RIBUF			__REG8(PS2_BASE + 0x00)
+#define PS2_WOBUF			__REG8(PS2_BASE + 0x00)
+#define PS2_RSR				__REG8(PS2_BASE + 0x04)
+#define PS2_WSC				__REG8(PS2_BASE + 0x04)
+#define PS2_DLL				__REG8(PS2_BASE + 0x08)
+#define PS2_DLH				__REG8(PS2_BASE + 0x09)
+#define PS2_DL_KBD			__REG8(PS2_BASE + 0x0A)
+#define PS2_DL_AUX			__REG8(PS2_BASE + 0x0B)
+
+/* UART registers */
+#define UART_DAT(base)		__REG8(base + 0x00)
+#define UART_IER(base)		__REG8(base + 0x01)
+#define UART_IIR(base)		__REG8(base + 0x02)
+#define UART_FCR(base)		__REG8(base + 0x02)
+#define UART_LCR(base)		__REG8(base + 0x03)
+#define UART_MCR(base)		__REG8(base + 0x04)
+#define UART_LSR(base)		__REG8(base + 0x05)
+#define UART_MSR(base)		__REG8(base + 0x06)
+
+#define UART_LSB(base)		__REG8(base + 0x00)
+#define UART_MSB(base)		__REG8(base + 0x01)
+
+/* UART0 registers */
+#define UART0_DAT			__REG8(UART0_BASE + 0x00)
+#define UART0_IER			__REG8(UART0_BASE + 0x01)
+#define UART0_IIR			__REG8(UART0_BASE + 0x02)
+#define UART0_FCR			__REG8(UART0_BASE + 0x02)
+#define UART0_LCR			__REG8(UART0_BASE + 0x03)
+#define UART0_MCR			__REG8(UART0_BASE + 0x04)
+#define UART0_LSR			__REG8(UART0_BASE + 0x05)
+#define UART0_MSR			__REG8(UART0_BASE + 0x06)
+
+#define UART0_LSB			__REG8(UART0_BASE + 0x00)
+#define UART0_MSB			__REG8(UART0_BASE + 0x01)
+
+/* UART1 registers */
+#define UART1_DAT			__REG8(UART1_BASE + 0x00)
+#define UART1_IER			__REG8(UART1_BASE + 0x01)
+#define UART1_IIR			__REG8(UART1_BASE + 0x02)
+#define UART1_FCR			__REG8(UART1_BASE + 0x02)
+#define UART1_LCR			__REG8(UART1_BASE + 0x03)
+#define UART1_MCR			__REG8(UART1_BASE + 0x04)
+#define UART1_LSR			__REG8(UART1_BASE + 0x05)
+#define UART1_MSR			__REG8(UART1_BASE + 0x06)
+
+#define UART1_LSB			__REG8(UART1_BASE + 0x00)
+#define UART1_MSB			__REG8(UART1_BASE + 0x01)
+
+/* LPB misc registers */
+#define GPIO_OE_7_0			__REG8(LPB_MISC_BASE + 0x00)
+#define GPIO_OE_15_8		__REG8(LPB_MISC_BASE + 0x01)
+#define GPIO_OE_23_16		__REG8(LPB_MISC_BASE + 0x02)
+#define GPIO_OE_28_24		__REG8(LPB_MISC_BASE + 0x03)
+#define GPIO_I_7_0			__REG8(LPB_MISC_BASE + 0x10)
+#define GPIO_I_15_8			__REG8(LPB_MISC_BASE + 0x11)
+#define GPIO_I_23_16		__REG8(LPB_MISC_BASE + 0x12)
+#define GPIO_I_28_24		__REG8(LPB_MISC_BASE + 0x13)
+#define GPIO_O_7_0			__REG8(LPB_MISC_BASE + 0x20)
+#define GPIO_O_15_8			__REG8(LPB_MISC_BASE + 0x21)
+#define GPIO_O_23_16		__REG8(LPB_MISC_BASE + 0x22)
+#define GPIO_O_28_24		__REG8(LPB_MISC_BASE + 0x23)
+#define LPB_MISC_CFG		__REG8(LPB_MISC_BASE + 0x40)
+
+/* MAC0 registers */
+#define MAC0_BUS_MODE		__REG32(MAC0_BASE + 0x00)
+#define MAC0_TX_POLL_REQ	__REG32(MAC0_BASE + 0x08)
+#define MAC0_RX_POLL_REQ	__REG32(MAC0_BASE + 0x10)
+#define MAC0_RX_LIST_BASE_ADDR	__REG32(MAC0_BASE + 0x18)
+#define MAC0_TX_LIST_BASE_ADDR	__REG32(MAC0_BASE + 0x20)
+#define MAC0_STATUS			__REG32(MAC0_BASE + 0x28)
+#define MAC0_OP_MODE		__REG32(MAC0_BASE + 0x30)
+#define MAC0_INTERRUPT_EN	__REG32(MAC0_BASE + 0x38)
+#define MAC0_MISSED_FRAME_STATISTIC	__REG32(MAC0_BASE + 0x40)
+#define MAC0_SMI_EEPROM_CTL	__REG32(MAC0_BASE + 0x48)
+#define MAC0_BYTE_ALIGN		__REG32(MAC0_BASE + 0x50)
+#define MAC0_GPT_IM_CTL		__REG32(MAC0_BASE + 0x58)
+
+/* MAC1 registers */
+#define MAC1_BUS_MODE		__REG32(MAC1_BASE + 0x00)
+#define MAC1_TX_POLL_REQ	__REG32(MAC1_BASE + 0x08)
+#define MAC1_RX_POLL_REQ	__REG32(MAC1_BASE + 0x10)
+#define MAC1_RX_LIST_BASE_ADDR	__REG32(MAC1_BASE + 0x18)
+#define MAC1_TX_LIST_BASE_ADDR	__REG32(MAC1_BASE + 0x20)
+#define MAC1_STATUS			__REG32(MAC1_BASE + 0x28)
+#define MAC1_OP_MODE		__REG32(MAC1_BASE + 0x30)
+#define MAC1_INTERRUPT_EN	__REG32(MAC1_BASE + 0x38)
+#define MAC1_MISSED_FRAME_STATISTIC	__REG32(MAC1_BASE + 0x40)
+#define MAC1_SMI_EEPROM_CTL	__REG32(MAC1_BASE + 0x48)
+#define MAC1_BYTE_ALIGN		__REG32(MAC1_BASE + 0x50)
+#define MAC1_GPT_IM_CTL		__REG32(MAC1_BASE + 0x58)
+
+/* Peripheral Interrupt Number */
+#define IRQ_LCD				0
+#define IRQ_MAC1			1
+#define IRQ_MAC2			2
+#define IRQ_AC97			3
+#define IRQ_SPI				8
+#define IRQ_KEY				9
+#define IRQ_MOUSE			10
+#define IRQ_UART0			11
+#define IRQ_UART1			12
+#define IRQ_I2C				13
+#define IRQ_CAN0			14
+#define IRQ_CAN1			15
+#define IRQ_GPIO15			20
+#define IRQ_GPIO14			21
+#define IRQ_GPIO13			22
+#define IRQ_GPIO12			23
+
+#define SYSTEM_STACK		0x80003fe8		/* the kernel system stack address */
+
+#endif
diff --git a/libcpu/mips/loongson/stack.c b/libcpu/mips/loongson/stack.c
new file mode 100644
index 0000000000000000000000000000000000000000..187845da586c8c5a135753e97855e909fb74c63c
--- /dev/null
+++ b/libcpu/mips/loongson/stack.c
@@ -0,0 +1,94 @@
+/*
+ * File      : stack.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-17     swkyer       first version
+ * 2010-07-07     Bernard      porting to Jz47xx
+ */
+#include <rtthread.h>
+
+/**
+ * @addtogroup Loogonson SoC3210
+ */
+/*@{*/
+
+extern rt_uint32_t cp0_get_cause(void);
+extern rt_uint32_t cp0_get_status(void);
+extern rt_uint32_t cp0_get_hi(void);
+extern rt_uint32_t cp0_get_lo(void);
+
+/**
+ * This function will initialize thread stack
+ *
+ * @param tentry the entry of thread
+ * @param parameter the parameter of entry
+ * @param stack_addr the beginning stack address
+ * @param texit the function will be called when thread exit
+ *
+ * @return stack address
+ */
+rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit)
+{
+	rt_uint32_t *stk;
+    static rt_uint32_t g_sr = 0;
+
+    if (g_sr == 0)
+    {
+    	g_sr = cp0_get_status();
+    	g_sr &= 0xfffffffe;
+    	g_sr |= 0x8401;
+    }
+
+    /** Start at stack top */
+    stk = (rt_uint32_t *)stack_addr;
+	*(stk)   = (rt_uint32_t) tentry;        /* pc: Entry Point */
+	*(--stk) = (rt_uint32_t) 0xeeee; 		/* c0_cause */
+	*(--stk) = (rt_uint32_t) 0xffff;		/* c0_badvaddr */
+	*(--stk) = (rt_uint32_t) cp0_get_lo();	/* lo */
+	*(--stk) = (rt_uint32_t) cp0_get_hi();	/* hi */
+	*(--stk) = (rt_uint32_t) g_sr; 			/* C0_SR: HW2 = En, IE = En */
+	*(--stk) = (rt_uint32_t) texit;	        /* ra */
+	*(--stk) = (rt_uint32_t) 0x0000001e;	/* s8 */
+	*(--stk) = (rt_uint32_t) stack_addr;	/* sp */
+	*(--stk) = (rt_uint32_t) 0x0000001c;	/* gp */
+	*(--stk) = (rt_uint32_t) 0x0000001b;	/* k1 */
+	*(--stk) = (rt_uint32_t) 0x0000001a;	/* k0 */
+	*(--stk) = (rt_uint32_t) 0x00000019;	/* t9 */
+	*(--stk) = (rt_uint32_t) 0x00000018;	/* t8 */
+	*(--stk) = (rt_uint32_t) 0x00000017;	/* s7 */
+	*(--stk) = (rt_uint32_t) 0x00000016;	/* s6 */
+	*(--stk) = (rt_uint32_t) 0x00000015;	/* s5 */
+	*(--stk) = (rt_uint32_t) 0x00000014;	/* s4 */
+	*(--stk) = (rt_uint32_t) 0x00000013;	/* s3 */
+	*(--stk) = (rt_uint32_t) 0x00000012;	/* s2 */
+	*(--stk) = (rt_uint32_t) 0x00000011;	/* s1 */
+	*(--stk) = (rt_uint32_t) 0x00000010;	/* s0 */
+	*(--stk) = (rt_uint32_t) 0x0000000f;	/* t7 */
+	*(--stk) = (rt_uint32_t) 0x0000000e;	/* t6 */
+	*(--stk) = (rt_uint32_t) 0x0000000d;	/* t5 */
+	*(--stk) = (rt_uint32_t) 0x0000000c;	/* t4 */
+	*(--stk) = (rt_uint32_t) 0x0000000b;	/* t3 */
+	*(--stk) = (rt_uint32_t) 0x0000000a; 	/* t2 */
+	*(--stk) = (rt_uint32_t) 0x00000009;	/* t1 */
+	*(--stk) = (rt_uint32_t) 0x00000008;	/* t0 */
+	*(--stk) = (rt_uint32_t) 0x00000007;	/* a3 */
+	*(--stk) = (rt_uint32_t) 0x00000006;	/* a2 */
+	*(--stk) = (rt_uint32_t) 0x00000005;	/* a1 */
+	*(--stk) = (rt_uint32_t) parameter;	    /* a0 */
+	*(--stk) = (rt_uint32_t) 0x00000003;	/* v1 */
+	*(--stk) = (rt_uint32_t) 0x00000002;	/* v0 */
+	*(--stk) = (rt_uint32_t) 0x00000001;	/* at */
+	*(--stk) = (rt_uint32_t) 0x00000000;	/* zero */
+
+	/* return task's current stack address */
+	return (rt_uint8_t *)stk;
+}
+
+/*@}*/
diff --git a/libcpu/mips/loongson/start_gcc.S b/libcpu/mips/loongson/start_gcc.S
new file mode 100644
index 0000000000000000000000000000000000000000..42e19b5d99a276e78a64b15a50383f3d7132263d
--- /dev/null
+++ b/libcpu/mips/loongson/start_gcc.S
@@ -0,0 +1,132 @@
+/*
+ * File      : start_gcc.S
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-05-17     swkyer       first version
+ * 2010-09-04     bernard      porting to Jz47xx
+ */
+
+#include "../common/mips.inc"
+#include "../common/stackframe.h"
+#include "soc3210.h"
+
+    .section ".start", "ax"
+    .set noreorder
+
+    /* the program entry */
+    .globl  _start
+_start:
+    .set    noreorder
+    la      ra, _start
+
+	/* disable interrupt */
+	mfc0	t0, CP0_STATUS
+	and 	t0, 0xfffffffe	# By default it will be disabled.
+	mtc0	t0, CP0_STATUS	# Set CPU to disable interrupt.
+	nop
+
+	/* disable cache */
+	mfc0	t0, CP0_CONFIG
+	and		t0, 0xfffffff8
+	or		t0, 0x2			# disable,!default value is not it!
+	mtc0	t0, CP0_CONFIG	# Set CPU to disable cache.
+	nop
+
+    /* setup stack pointer */
+    li      sp, SYSTEM_STACK
+    la      gp, _gp
+
+    /* copy IRAM section */
+    la     t0, _iramcopy
+    la     t1, _iramstart
+    la     t2, _iramend
+_iram_loop:
+    lw     t3, 0(t0)
+    sw     t3, 0(t1)
+    addiu  t1, 4
+    bne    t1, t2, _iram_loop
+    addiu  t0, 4
+
+    /* clear bss */
+    la      t0, __bss_start
+    la      t1, __bss_end
+_clr_bss_loop:
+    sw      zero, 0(t0)
+    bne     t0, t1, _clr_bss_loop
+    addiu   t0, t0, 4
+
+    /* jump to RT-Thread RTOS */
+    jal     rtthread_startup
+    nop
+
+    /* restart, never die */
+    j       _start
+    nop
+    .set    reorder
+
+    .globl  cp0_get_cause
+cp0_get_cause:
+    mfc0    v0, CP0_CAUSE
+    jr      ra
+    nop
+
+    .globl  cp0_get_status
+cp0_get_status:
+    mfc0    v0, CP0_STATUS
+    jr      ra
+    nop
+
+    .globl  cp0_get_hi
+cp0_get_hi:
+    mfhi    v0
+    jr      ra
+    nop
+
+    .globl  cp0_get_lo
+cp0_get_lo:
+    mflo    v0
+    jr      ra
+    nop
+
+	.extern tlb_refill_handler
+	.extern cache_error_handler
+
+	/* Exception Handler */
+	/* 0x0 - TLB refill handler */
+    .section .vectors.1, "ax", %progbits
+    j      tlb_refill_handler
+    nop
+	
+	/* 0x100 - Cache error handler */
+    .section .vectors.2, "ax", %progbits
+    j      cache_error_handler
+    nop
+    
+	/* 0x180 - Exception/Interrupt handler */
+    .section .vectors.3, "ax", %progbits
+    j      _general_exception_handler
+    nop
+    
+	/* 0x200 - Special Exception Interrupt handler (when IV is set in CP0_CAUSE) */
+    .section .vectors.4, "ax", %progbits
+    j      _irq_handler
+    nop
+	
+    .section .vectors, "ax", %progbits
+	.extern mips_irq_handle
+
+    /* general exception handler */
+_general_exception_handler:
+    .set    noreorder
+    la      k0, mips_irq_handle
+    jr      k0
+    nop
+    .set    reorder
+
+    /* interrupt handler */
+_irq_handler:
+    .set    noreorder
+    la      k0, mips_irq_handle
+    jr      k0
+    nop
+    .set    reorder