diff --git a/bsp/ls2kdev/SConstruct b/bsp/ls2kdev/SConstruct
index 69373ed71f2..6fd6fc67f95 100644
--- a/bsp/ls2kdev/SConstruct
+++ b/bsp/ls2kdev/SConstruct
@@ -15,6 +15,7 @@ DefaultEnvironment(tools=[])
 env = Environment(tools = ['mingw'],
 	AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
 	CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+	CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
 	AR = rtconfig.AR, ARFLAGS = '-rc',
 	LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
diff --git a/bsp/ls2kdev/drivers/board.c b/bsp/ls2kdev/drivers/board.c
index 20b7a845161..6a667771219 100644
--- a/bsp/ls2kdev/drivers/board.c
+++ b/bsp/ls2kdev/drivers/board.c
@@ -12,6 +12,7 @@
 #include <rthw.h>
 
 #include "mips_regs.h"
+#include "mips_fpu.h"
 #include "exception.h"
 #include "drv_uart.h"
 #include "board.h"
diff --git a/bsp/ls2kdev/drivers/drv_gpio.c b/bsp/ls2kdev/drivers/drv_gpio.c
index e1c5d61331d..155807461fd 100644
--- a/bsp/ls2kdev/drivers/drv_gpio.c
+++ b/bsp/ls2kdev/drivers/drv_gpio.c
@@ -73,7 +73,7 @@ static int loongson_pin_read(struct rt_device *device, rt_base_t pin)
     gpio = (void *)device->user_data;
     rt_uint64_t m;
 
-    m  = gpio->GPIO1_I;
+    m  = gpio->GPIO0_I;
     m &= (rt_uint64_t)1 << pin;
 
     rc = !!m;
diff --git a/bsp/ls2kdev/drivers/drv_rtc.c b/bsp/ls2kdev/drivers/drv_rtc.c
index 3a873cc6fcd..ee125122e37 100644
--- a/bsp/ls2kdev/drivers/drv_rtc.c
+++ b/bsp/ls2kdev/drivers/drv_rtc.c
@@ -17,6 +17,8 @@
 #include <rtthread.h>
 #include "ls2k1000.h"
 
+#ifdef RT_USING_RTC
+
 struct loongson_rtc {
     rt_uint32_t sys_toytrim;
     rt_uint32_t sys_toywrite0;
@@ -176,3 +178,5 @@ int rt_hw_rtc_init(void)
 }
 
 INIT_DEVICE_EXPORT(rt_hw_rtc_init);
+
+#endif /*RT_USING_RTC*/
diff --git a/bsp/ls2kdev/ls2k_ram.lds b/bsp/ls2kdev/ls2k_ram.lds
index 8bec1e855bc..313a52969c5 100644
--- a/bsp/ls2kdev/ls2k_ram.lds
+++ b/bsp/ls2kdev/ls2k_ram.lds
@@ -78,6 +78,23 @@ SECTIONS
          *(.sdata.*)
     }
 
+    . = ALIGN(4);
+    .ctors :
+    {
+        PROVIDE(__ctors_start__ = .);
+        KEEP(*(SORT(.ctors.*)))
+        KEEP(*(.ctors))
+        PROVIDE(__ctors_end__ = .);
+    }
+
+    .dtors :
+    {
+        PROVIDE(__dtors_start__ = .);
+        KEEP(*(SORT(.dtors.*)))
+        KEEP(*(.dtors))
+        PROVIDE(__dtors_end__ = .);
+    }
+
     .stack :
     {
         . = ALIGN(8);
diff --git a/bsp/ls2kdev/rtconfig.py b/bsp/ls2kdev/rtconfig.py
index d932bf985b1..09881984265 100644
--- a/bsp/ls2kdev/rtconfig.py
+++ b/bsp/ls2kdev/rtconfig.py
@@ -31,6 +31,7 @@
 
 PREFIX = 'mips-sde-elf-'
 CC = PREFIX + 'gcc'
+CXX = PREFIX + 'g++'
 AS = PREFIX + 'gcc'
 AR = PREFIX + 'ar'
 LINK = PREFIX + 'gcc'
diff --git a/libcpu/mips/common/asm.h b/libcpu/mips/common/asm.h
index 6a5353b8039..1b39eea05a0 100644
--- a/libcpu/mips/common/asm.h
+++ b/libcpu/mips/common/asm.h
@@ -261,11 +261,7 @@ symbol		=	value
 #define LONG_SRAV	srav
 
 #define LONG		.word
-#ifdef ARCH_MIPS64
-#define LONGSIZE	8
-#else
 #define LONGSIZE	4
-#endif
 #define LONGMASK	3
 #define LONGLOG		2
 
diff --git a/libcpu/mips/common/stackframe.h b/libcpu/mips/common/stackframe.h
index 258f9a994fe..4f1157aebfb 100644
--- a/libcpu/mips/common/stackframe.h
+++ b/libcpu/mips/common/stackframe.h
@@ -22,7 +22,9 @@
 #ifdef RT_USING_FPU
     /* Ensure CU1 (FPU) is enabled */
     MFC0 v1, CP0_STATUS
-    ori v1, ST0_CU1
+    lui t1, %hi(ST0_CU1)
+    addiu t1, t1, %lo(ST0_CU1)
+    or v1, v1, t1
     MTC0 v1, CP0_STATUS
     SSNOP
     cfc1 v1, fcr31
@@ -125,11 +127,13 @@
 #ifdef RT_USING_FPU
     /* Ensure CU1 (FPU) is enabled */
     MFC0 v1, CP0_STATUS
-    ori v1, ST0_CU1
+    lui t1, %hi(ST0_CU1)
+    addiu t1, t1, %lo(ST0_CU1)
+    or v1, v1, t1
     MTC0 v1, CP0_STATUS
     SSNOP
     LONG_L v1, PT_FPU_FCSR31(sp)
-    ctc1 v1, fcsr31
+    ctc1 v1, fcr31
     l.d $f0, PT_FPU_R0(sp)
     l.d $f2, PT_FPU_R2(sp)
     l.d $f4, PT_FPU_R4(sp)