Completes coding of the PWM module

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4200 7fd9a85b-ad96-42d3-883c-3090e2eb8679

21 files changed, 2820 insertions, 0 deletions

diff --git a/nuttx/arch/rgmp/include/arch.h b/nuttx/arch/rgmp/include/arch.h
new file mode 100644
index 000000000..c93397baa
--- /dev/null
+++ b/nuttx/arch/rgmp/include/arch.h
@@ -0,0 +1,64 @@
+/****************************************************************************
+ * arch/rgmp/include/arch.h
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __RGMP_ARCH_ARCH_H
+#define __RGMP_ARCH_ARCH_H
+
+#include <arch/subarch/arch.h>
+
+#ifndef __ASSEMBLY__
+
+#include <nuttx/sched.h>
+
+
+struct up_wait {
+    struct up_wait *next;
+    _TCB *task;
+};
+
+extern _TCB *current_task;
+
+void up_sigentry(void);
+
+int up_register_bridge(char *name, int size);
+int up_unregister_bridge(char *name);
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/nuttx/arch/rgmp/include/arm/arch/subarch/arch.h b/nuttx/arch/rgmp/include/arm/arch/subarch/arch.h
new file mode 100644
index 000000000..8b92c6bfe
--- /dev/null
+++ b/nuttx/arch/rgmp/include/arm/arch/subarch/arch.h
@@ -0,0 +1,58 @@
+/****************************************************************************
+ * arch/rgmp/include/arm/arch/subarch/arch.h
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __RGMP_ARCH_SUBARCH_ARCH_H
+#define __RGMP_ARCH_SUBARCH_ARCH_H
+
+#ifndef __ASSEMBLY__
+
+
+static inline void up_mdelay(uint32_t msec)
+{
+    
+}
+
+static inline void up_udelay(uint32_t usec)
+{
+    
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/nuttx/arch/rgmp/include/irq.h b/nuttx/arch/rgmp/include/irq.h
new file mode 100644
index 000000000..00c977560
--- /dev/null
+++ b/nuttx/arch/rgmp/include/irq.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+ * arch/rgmp/include/irq.h
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RGMP_INCLUDE_IRQ_H
+#define __ARCH_RGMP_INCLUDE_IRQ_H
+
+#define NR_IRQS  0
+
+#ifndef __ASSEMBLY__
+
+#include <rgmp/spinlock.h>
+#include <arch/types.h>
+#include <rgmp/trap.h>
+
+struct xcptcontext {
+    struct Trapframe *tf;
+    // for signal using
+    unsigned int save_eip;
+    unsigned int save_eflags;
+    void *sigdeliver;
+};
+
+void push_xcptcontext(struct xcptcontext *xcp);
+void pop_xcptcontext(struct xcptcontext *xcp);
+
+extern int nest_irq;
+
+static inline irqstate_t irqsave(void)
+{
+    return pushcli();
+}
+
+static inline void irqrestore(irqstate_t flags)
+{
+    popcli(flags);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/nuttx/arch/rgmp/include/limits.h b/nuttx/arch/rgmp/include/limits.h
new file mode 100644
index 000000000..855836660
--- /dev/null
+++ b/nuttx/arch/rgmp/include/limits.h
@@ -0,0 +1,81 @@
+/************************************************************
+ * arch/rgmp/include/limits.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************/
+
+#ifndef __ARCH_RGMP_INCLUDE_LIMITS_H 
+#define __ARCH_RGMP_INCLUDE_LIMITS_H 
+
+/************************************************************
+ * Included Files
+ ************************************************************/
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+#define CHAR_BIT    8
+#define SCHAR_MIN   0x80
+#define SCHAR_MAX   0x7f
+#define UCHAR_MAX   0xff
+
+/* These could be different on machines where char is unsigned */
+
+#define CHAR_MIN    SCHAR_MIN
+#define CHAR_MAX    SCHAR_MAX
+
+#define SHRT_MIN    0x8000
+#define SHRT_MAX    0x7fff
+#define USHRT_MAX   0xffff
+
+#define INT_MIN     0x80000000
+#define INT_MAX     0x7fffffff
+#define UINT_MAX    0xffffffff
+
+/* These change on 32-bit and 64-bit platforms */
+
+#define LONG_MAX    0x80000000
+#define LONG_MIN    0x7fffffff
+#define ULONG_MAX   0xffffffff
+
+#define LLONG_MAX   0x8000000000000000
+#define LLONG_MIN   0x7fffffffffffffff
+#define ULLONG_MAX  0xffffffffffffffff
+
+/* A pointer is 4 bytes */
+
+#define PTR_MIN     0x80000000
+#define PTR_MAX     0x7fffffff
+#define UPTR_MAX    0xffffffff
+
+#endif /* __ARCH_RGMP_INCLUDE_LIMITS_H  */
diff --git a/nuttx/arch/rgmp/include/math.h b/nuttx/arch/rgmp/include/math.h
new file mode 100644
index 000000000..55f24aaa4
--- /dev/null
+++ b/nuttx/arch/rgmp/include/math.h
@@ -0,0 +1,65 @@
+/****************************************************************************
+ * arch/rgmp/include/math.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RGMP_INCLUDE_MATH_H
+#define __ARCH_RGMP_INCLUDE_MATH_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Type Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+#include <rgmp/math.h>
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ARCH_RGMP_INCLUDE_MATH_H */
diff --git a/nuttx/arch/rgmp/include/stdbool.h b/nuttx/arch/rgmp/include/stdbool.h
new file mode 100644
index 000000000..4af9ec9e3
--- /dev/null
+++ b/nuttx/arch/rgmp/include/stdbool.h
@@ -0,0 +1,89 @@
+/****************************************************************************
+ * arch/rgmp/include/stdbool.h
+ *
+ *   Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RGMP_INCLUDE_STDBOOL_H
+#define __ARCH_RGMP_INCLUDE_STDBOOL_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <stdint.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* bool, true, and false must be provided as macros so that they can be
+ * redefined by the application if necessary.
+ *
+ * NOTE: Under C99 'bool' is required to be defined to be the intrinsic type
+ * _Bool.  However, in this NuttX context, we need backward compatibility
+ * to pre-C99 standards where _Bool is not an intrinsic type.  Hence, we
+ * use _Bool8 as the underlying type.
+ */
+
+#ifndef CONFIG_ARCH_RGMP
+#define bool  _Bool8
+#endif
+#define true  1
+#define false 0
+
+#define __bool_true_false_are_defined 1
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/* A byte is the smallest address memory element (at least in architectures
+ * that do not support bit banding).  The requirement is only that type _Bool
+ * be large enough to hold the values 0 and 1.  We select uint8_t to minimize
+ * the RAM footprint of the executable.
+ *
+ * NOTE: We can't actually define the type _Bool here.  Under C99 _Bool is
+ * an intrinsic type and cannot be the target of a typedef.  However, in this
+ * NuttX context, we also need backward compatibility to pre-C99 standards
+ * where _Bool is not an intrinsic type.  We work around this by using _Bool8
+ * as the underlying type.
+ */
+
+#ifndef CONFIG_ARCH_RGMP
+typedef uint8_t _Bool8;
+#endif
+
+#endif /* __ARCH_RGMP_INCLUDE_STDBOOL_H */
diff --git a/nuttx/arch/rgmp/include/stdint.h b/nuttx/arch/rgmp/include/stdint.h
new file mode 100644
index 000000000..7b244dd9f
--- /dev/null
+++ b/nuttx/arch/rgmp/include/stdint.h
@@ -0,0 +1,277 @@
+/****************************************************************************
+ * arch/rgmp/include/stdint.h
+ *
+ *   Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RGMP_INCLUDE_STDINTL_H
+#define __ARCH_RGMP_INCLUDE_STDINTL_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <arch/types.h>
+#include <limits.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Limits of exact-width integer types */
+
+#define INT8_MIN            0x80
+#define INT8_MAX            0x7f
+#define UINT8_MAX           0xff
+
+#define INT16_MIN           0x8000
+#define INT16_MAX           0x7fff
+#define UINT16_MAX          0xffff
+
+#ifdef __INT64_DEFINED
+#  define INT24_MIN         0x800000
+#  define INT24_MAX         0x7fffff
+#  define UINT24_MAX        0xffffff
+#endif
+
+#define INT32_MIN           0x80000000
+#define INT32_MAX           0x7fffffff
+#define UINT32_MAX          0xffffffff
+
+#ifdef __INT64_DEFINED
+#  define INT64_MIN         0x8000000000000000
+#  define INT64_MAX         0x7fffffffffffffff
+#  define UINT64_MAX        0xffffffffffffffff
+#endif
+
+/* Limits of minimum-width integer types */
+
+#define INT8_LEASTN_MIN     0x80
+#define INT8_LEASTN_MAX     0x7f
+#define UINT8_LEASTN_MAX    0xff
+
+#define INT16_LEASTN_MIN    0x8000
+#define INT16_LEASTN_MAX    0x7fff
+#define UINT16_LEASTN_MAX   0xffff
+
+#ifdef __INT64_DEFINED
+#  define INT24_LEASTN_MIN  0x800000
+#  define INT24_LEASTN_MAX  0x7fffff
+#  define UINT24_LEASTN_MAX 0xffffff
+#endif
+
+#define INT32_LEASTN_MIN    0x80000000
+#define INT32_LEASTN_MAX    0x7fffffff
+#define UINT32_LEASTN_MAX   0xffffffff
+
+#ifdef __INT64_DEFINED
+#  define INT64_LEASTN_MIN  0x8000000000000000
+#  define INT64_LEASTN_MAX  0x7fffffffffffffff
+#  define UINT64_LEASTN_MAX 0xffffffffffffffff
+#endif
+
+/* Limits of fastest minimum-width integer types */
+
+#define INT8_FASTN_MIN      0x80
+#define INT8_FASTN_MAX      0x7f
+#define UINT8_FASTN_MAX     0xff
+
+#define INT16_FASTN_MIN     0x8000
+#define INT16_FASTN_MAX     0x7fff
+#define UINT16_FASTN_MAX    0xffff
+
+#ifdef __INT64_DEFINED
+#  define INT24_FASTN_MIN   0x800000
+#  define INT24_FASTN_MAX   0x7fffff
+#  define UINT24_FASTN_MAX  0xffffff
+#endif
+
+#define INT32_FASTN_MIN     0x80000000
+#define INT32_FASTN_MAX     0x7fffffff
+#define UINT32_FASTN_MAX    0xffffffff
+
+#ifdef __INT64_DEFINED
+#  define INT64_FASTN_MIN   0x8000000000000000
+#  define INT64_FASTN_MAX   0x7fffffffffffffff
+#  define UINT64_FASTN_MAX  0xffffffffffffffff
+#endif
+
+/* Limits of integer types capable of holding object pointers */
+
+#define INTPTR_MIN          PTR_MIN
+#define INTPTR_MAX          PTR_MIN
+#define UINTPTR_MAX         UPTR_MAX
+
+/* Limits of greatest-width integer types */
+
+#ifdef __INT64_DEFINED
+#  define INTMAX_MIN        INT64_MIN
+#  define INTMAX_MAX        INT64_MAX
+
+#  define UINTMAX_MIN       UINT64_MIN
+#  define UINTMAX_MAX       UINT64_MAX
+#else
+#  define INTMAX_MIN        INT32_MIN
+#  define INTMAX_MAX        INT32_MAX
+
+#  define UINTMAX_MIN       UINT32_MIN
+#  define UINTMAX_MAX       UINT32_MAX
+#endif
+
+/* Macros for minimum-width integer constant expressions */
+
+#if 0 /* REVISIT: Depends on architecture specific implementation */
+#define INT8_C(x) x
+#define INT16_C(x) x
+#define INT32_C(x) x ## L
+#define INT64_C(x) x ## LL
+
+#define UINT8_C(x) x
+#define UINT16_C(x) x
+#define UINT32_C(x) x ## UL
+#define UINT64_C(x) x ## ULL
+#endif
+
+/* Macros for greatest-width integer constant expressions
+
+#ifdef CONFIG_HAVE_LONG_LONG
+#  define INTMAX_C(x) x ## LL
+#  define UINTMAX_C(x) x ## ULL
+#else
+#  define INTMAX_C(x) x ## L
+#  define UINTMAX_C(x) x ## UL
+#endif
+
+/* Limits of Other Integer Types */
+
+#if 0
+#  define PTRDIFF_MIN
+#  define PTRDIFF_MAX
+#endif
+
+#ifdef CONFIG_SMALL_MEMORY
+#  define SIZE_MAX 0xffff
+#else
+#  define SIZE_MAX 0xffffffff
+#endif
+
+#if 0
+#  define WCHAR_MIN
+#  define WCHAR_MAX
+
+#  define WINT_MIN
+#  define WINT_MAX
+#endif
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/* Exact-width integer types.  NOTE that these types are defined in
+ * architecture-specific logic with leading underscore character. This file
+ * typedef's these to the final name without the underscore character.  This
+ * roundabout way of doings things allows the stdint.h to be removed from the
+ * include/ directory in the event that the user prefers to use the definitions
+ * provided by their toolchain header files.
+ */
+
+#include <rgmp/types.h>
+
+/* Minimum-width integer types */
+
+typedef _int8_t      int_least8_t;
+typedef _uint8_t     uint_least8_t;
+
+typedef _int16_t     int_least16_t;
+typedef _uint16_t    uint_least16_t;
+
+#ifdef __INT24_DEFINED
+typedef _int24_t     int_least24_t;
+typedef _uint24_t    uint_least24_t;
+#else
+typedef _int32_t     int_least24_t;
+typedef _uint32_t    uint_least24_t;
+#endif
+
+typedef _int32_t     int_least32_t;
+typedef _uint32_t    uint_least32_t;
+
+#ifdef __INT64_DEFINED
+typedef _int64_t     int_least64_t;
+typedef _uint64_t    uint_least64_t;
+#endif
+
+/* Fastest minimum-width integer types */
+
+typedef _int8_t      int_fast8_t;
+typedef _uint8_t     uint_fast8_t;
+
+typedef int          int_fast16_t;
+typedef unsigned int uint_fast16_t;
+
+#ifdef __INT24_DEFINED
+typedef _int24_t     int_fast24_t;
+typedef _uint24_t    uint_fast24_t;
+#else
+typedef _int32_t     int_fast24_t;
+typedef _uint32_t    uint_fast24_t;
+#endif
+
+typedef _int32_t     int_fast32_t;
+typedef _uint32_t    uint_fast32_t;
+
+#ifdef __INT64_DEFINED
+typedef _int64_t     int_fast64_t;
+typedef _uint64_t    uint_fast64_t;
+#endif
+
+/* Integer types capable of holding object pointers */
+
+#ifndef CONFIG_ARCH_RGMP
+typedef _intptr_t    intptr_t;
+typedef _uintptr_t   uintptr_t;
+#endif
+
+/* Greatest-width integer types */
+
+#ifdef __INT64_DEFINED
+typedef _int64_t     intmax_t;
+typedef _uint64_t    uintmax_t;
+#else
+typedef _int32_t     intmax_t;
+typedef _uint32_t    uintmax_t;
+#endif
+
+#endif /* __ARCH_RGMP_INCLUDE_STDINTL_H */
diff --git a/nuttx/arch/rgmp/include/types.h b/nuttx/arch/rgmp/include/types.h
new file mode 100644
index 000000000..48e141db3
--- /dev/null
+++ b/nuttx/arch/rgmp/include/types.h
@@ -0,0 +1,96 @@
+/************************************************************************
+ * arch/rgmp/include/types.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************/
+
+/* This file should never be included directed but, rather,
+ * only indirectly through sys/types.h
+ */
+
+#ifndef __ARCH_RGMP_INCLUDE_TYPES_H
+#define __ARCH_RGMP_INCLUDE_TYPES_H
+
+/************************************************************************
+ * Included Files
+ ************************************************************************/
+
+/************************************************************************
+ * Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Type Declarations
+ ************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/* These are the sizes of the standard integer types.  NOTE that these type
+ * names have a leading underscore character.  This file will be included
+ * (indirectly) by include/stdint.h and typedef'ed to the final name without
+ * the underscore character.  This roundabout way of doings things allows
+ * the stdint.h to be removed from the include/ directory in the event that
+ * the user prefers to use the definitions provided by their toolchain header
+ * files
+ */
+
+typedef char               _int8_t;
+typedef unsigned char      _uint8_t;
+
+typedef short              _int16_t;
+typedef unsigned short     _uint16_t;
+
+typedef int                _int32_t;
+typedef unsigned int       _uint32_t;
+
+typedef long long          _int64_t;
+typedef unsigned long long _uint64_t;
+#define __INT64_DEFINED
+
+/* A pointer is 4 bytes */
+
+typedef unsigned int       _intptr_t;
+typedef unsigned int       _uintptr_t;
+
+/* This is the size of the interrupt state save returned by
+ * irqsave()
+ */
+
+typedef unsigned int       irqstate_t;
+
+#endif /* __ASSEMBLY__ */
+
+/************************************************************************
+ * Global Function Prototypes
+ ************************************************************************/
+
+#endif /* __ARCH_RGMP_INCLUDE_TYPES_H */
diff --git a/nuttx/arch/rgmp/include/x86/arch/com.h b/nuttx/arch/rgmp/include/x86/arch/com.h
new file mode 100644
index 000000000..89df901bb
--- /dev/null
+++ b/nuttx/arch/rgmp/include/x86/arch/com.h
@@ -0,0 +1,58 @@
+/****************************************************************************
+ * arch/rgmp/include/com.h
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RGMP_INCLUDE_COM_H
+#define __ARCH_RGMP_INCLUDE_COM_H
+
+#define COM_SET_BAUD         1
+#define COM_SET_PARITY       2
+#define   COM_NO_PARITY      0
+#define   COM_ODD_PARITY     1
+#define   COM_EVEN_PARITY    3
+#define COM_SET_STOPBITS     3
+#define   COM_ONE_STOPBITS   0
+#define   COM_TWO_STOPBITS   1
+#define COM_SET_BITS         4
+#define   COM_8_BITS         3
+#define   COM_7_BITS         2
+#define   COM_6_BITS         1
+#define   COM_5_BITS         0
+
+
+#endif
diff --git a/nuttx/arch/rgmp/include/x86/arch/subarch/arch.h b/nuttx/arch/rgmp/include/x86/arch/subarch/arch.h
new file mode 100644
index 000000000..2f401c03b
--- /dev/null
+++ b/nuttx/arch/rgmp/include/x86/arch/subarch/arch.h
@@ -0,0 +1,60 @@
+/****************************************************************************
+ * arch/rgmp/include/x86/arch/subarch/arch.h
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __RGMP_ARCH_SUBARCH_ARCH_H
+#define __RGMP_ARCH_SUBARCH_ARCH_H
+
+#ifndef __ASSEMBLY__
+
+#include <rgmp/arch/hpet.h>
+
+
+static inline void up_mdelay(uint32_t msec)
+{
+    hpet_ndelay(msec*1000000);
+}
+
+static inline void up_udelay(uint32_t usec)
+{
+    hpet_udelay(usec*1000);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/nuttx/arch/rgmp/src/Makefile b/nuttx/arch/rgmp/src/Makefile
new file mode 100644
index 000000000..f973a28fa
--- /dev/null
+++ b/nuttx/arch/rgmp/src/Makefile
@@ -0,0 +1,104 @@
+############################################################################
+# arch/rgmp/src/Makefile
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+-include $(TOPDIR)/Make.defs
+include $(CONFIG_RGMP_SUBARCH)/Make.defs
+
+RGMP_ARCH_ASRCS := $(addprefix $(CONFIG_RGMP_SUBARCH)/,$(RGMP_ARCH_ASRCS))
+RGMP_ARCH_CSRCS := $(addprefix $(CONFIG_RGMP_SUBARCH)/,$(RGMP_ARCH_CSRCS))
+
+CFLAGS		+= -I$(TOPDIR)/sched -I$(TOPDIR)/fs
+
+ASRCS		= $(RGMP_ARCH_ASRCS)
+CSRCS		= nuttx.c rgmp.c bridge.c $(RGMP_ARCH_CSRCS)
+AOBJS		= $(ASRCS:.S=$(OBJEXT))
+COBJS		= $(CSRCS:.c=$(OBJEXT))
+
+SRCS		= $(ASRCS) $(CSRCS)
+OBJS		= $(AOBJS) $(COBJS)
+
+LDFLAGS		+= -T$(RGMPLKSCPT)
+LDPATHS		= $(addprefix -L$(TOPDIR)/,$(dir $(LINKLIBS)))
+LDLIBS		= $(patsubst lib%,-l%,$(basename $(notdir $(LINKLIBS))))
+LDPATHS		+= -L$(RGMPLIBDIR)
+LDLIBS		+= -lrgmp -lm -ltest $(shell gcc -print-libgcc-file-name)
+
+all: libarch$(LIBEXT)
+.PHONY: clean distclean depend
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS) $(LINKOBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+# The architecture-specific library
+libarch$(LIBEXT): $(OBJS)
+	@( for obj in $(OBJS) ; do \
+		$(call ARCHIVE, $@, $${obj}); \
+	done ; )
+
+# Generate the final NuttX binary by linking the host-specific objects with the NuttX
+# specific objects (with munged names)
+
+nuttx$(EXEEXT):
+	@echo "LD:  nuttx$(EXEEXT)"
+	@$(LD) $(LDFLAGS) $(LDPATHS) --start-group $(LDLIBS) --end-group -o $(TOPDIR)/$@
+	@$(OBJDUMP) -S $(TOPDIR)/$@ > $(TOPDIR)/nuttx.asm
+	@$(NM) -n $(TOPDIR)/$@ > $(TOPDIR)/nuttx.sym
+	@$(OBJCOPY) -S -O binary $(TOPDIR)/$@ nuttx.img
+	@cp nuttx.img $(TOPDIR)/kernel.img
+
+# This is part of the top-level export target
+
+export_head:
+
+# Dependencies
+
+.depend: Makefile $(SRCS)
+	@$(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+	@touch $@
+
+depend: .depend
+
+clean:
+	@rm $(TOPDIR)/kernel.img nuttx.img 
+	@rm -f libarch$(LIBEXT) *~ .*.swp
+	$(call CLEAN)
+
+distclean: clean
+	@rm -f Make.dep .depend
+
+-include Make.dep
diff --git a/nuttx/arch/rgmp/src/arm/Make.defs b/nuttx/arch/rgmp/src/arm/Make.defs
new file mode 100644
index 000000000..8185980c6
--- /dev/null
+++ b/nuttx/arch/rgmp/src/arm/Make.defs
@@ -0,0 +1,42 @@
+############################################################################
+# rgmp/arm/Make.defs
+#
+#   Copyright (C) 2011 Yu Qiang. All rights reserved.
+#   Author: Yu Qiang <yuq825@gmail.com>
+#
+# This file is a part of NuttX:
+# 
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name Gregory Nutt nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+RGMP_ARCH_ASRCS = sigentry.S
+RGMP_ARCH_CSRCS = arch_nuttx.c
diff --git a/nuttx/arch/rgmp/src/arm/arch_nuttx.c b/nuttx/arch/rgmp/src/arm/arch_nuttx.c
new file mode 100644
index 000000000..cb946bfd1
--- /dev/null
+++ b/nuttx/arch/rgmp/src/arm/arch_nuttx.c
@@ -0,0 +1,91 @@
+/****************************************************************************
+ * arch/rgmp/src/arm/arch_nuttx.c
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#include <rgmp/mmu.h>
+#include <rgmp/string.h>
+
+#include <arch/arch.h>
+#include <nuttx/sched.h>
+#include <os_internal.h>
+
+
+void nuttx_arch_init(void)
+{
+    
+}
+
+void nuttx_arch_exit(void)
+{
+
+}
+
+void up_initial_state(_TCB *tcb)
+{
+    struct Trapframe *tf;
+
+    if (tcb->pid != 0) {
+	tf = (struct Trapframe *)tcb->adj_stack_ptr-1;
+	memset(tf, 0, sizeof(struct Trapframe));
+	tf->tf_cpsr = SVC_MOD;
+	tf->tf_pc = (uint32_t)tcb->start;
+	tcb->xcp.tf = tf;
+    }
+}
+
+void push_xcptcontext(struct xcptcontext *xcp)
+{
+    xcp->save_eip = xcp->tf->tf_pc;
+    xcp->save_eflags = xcp->tf->tf_cpsr;
+
+    // set  interrupts disabled
+    xcp->tf->tf_pc = (uint32_t)up_sigentry;
+    xcp->tf->tf_cpsr |= CPSR_IF;
+}
+
+void pop_xcptcontext(struct xcptcontext *xcp)
+{
+    xcp->tf->tf_pc = xcp->save_eip;
+    xcp->tf->tf_cpsr = xcp->save_eflags;
+}
+
+void raise(void)
+{
+
+}
+
diff --git a/nuttx/arch/rgmp/src/arm/sigentry.S b/nuttx/arch/rgmp/src/arm/sigentry.S
new file mode 100644
index 000000000..1e413450b
--- /dev/null
+++ b/nuttx/arch/rgmp/src/arm/sigentry.S
@@ -0,0 +1,49 @@
+/****************************************************************************
+ * arch/rgmp/src/arm/sigentry.S
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+	.globl up_sigentry
+up_sigentry:
+	sub	sp, sp, #68    @ 68 is the size of Trapframe
+	mov	r0, sp
+	bl	up_sigdeliver
+	add	sp, sp, #4     @ skip current_task
+	pop	{r0-r12, lr}
+	rfefd	sp!
+
+	
\ No newline at end of file
diff --git a/nuttx/arch/rgmp/src/bridge.c b/nuttx/arch/rgmp/src/bridge.c
new file mode 100644
index 000000000..7dcaf90f1
--- /dev/null
+++ b/nuttx/arch/rgmp/src/bridge.c
@@ -0,0 +1,104 @@
+/****************************************************************************
+ * arch/rgmp/src/bridge.c
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <stdbool.h>
+#include <nuttx/fs.h>
+#include <nuttx/kmalloc.h>
+#include <fs_internal.h>
+#include <queue.h>
+#include <arch/irq.h>
+#include <rgmp/bridge.h>
+#include <rgmp/string.h>
+#include <rgmp/stdio.h>
+
+
+static ssize_t up_bridge_read(struct file *filp, char *buffer, size_t len)
+{
+    struct rgmp_bridge *b;
+
+    b = filp->f_inode->i_private;
+    return rgmp_bridge_read(b, buffer, len);
+}
+
+static ssize_t up_bridge_write(struct file *filp, const char *buffer, size_t len)
+{
+    struct rgmp_bridge *b;
+
+    b = filp->f_inode->i_private;
+    return rgmp_bridge_write(b, (char *)buffer, len);
+}
+
+static int up_bridge_open(struct file *filp)
+{
+    return 0;
+}
+
+static int up_bridge_close(struct file *filp)
+{
+    return 0;
+}
+
+static const struct file_operations up_bridge_fops =
+{
+    .read = up_bridge_read,
+    .write = up_bridge_write,
+    .open = up_bridge_open,
+    .close = up_bridge_close,
+};
+
+void up_register_bridges(void)
+{
+    int err;
+    char path[30] = {'/', 'd', 'e', 'v', '/'};
+    struct rgmp_bridge *b;
+
+    for (b=bridge_list.next; b!=NULL; b=b->next) {
+	// make rgmp_bridge0 to be the console
+	if (strcmp(b->vdev->name, "rgmp_bridge0") == 0)
+	    strlcpy(path+5, "console", 25);
+	else
+	    strlcpy(path+5, b->vdev->name, 25);
+	err = register_driver(path, &up_bridge_fops, 0666, b);
+	if (err == ERROR)
+	    cprintf("NuttX: register bridge %s fail\n", b->vdev->name);
+    }
+}
+
+
diff --git a/nuttx/arch/rgmp/src/nuttx.c b/nuttx/arch/rgmp/src/nuttx.c
new file mode 100644
index 000000000..14b3e6d1d
--- /dev/null
+++ b/nuttx/arch/rgmp/src/nuttx.c
@@ -0,0 +1,504 @@
+/****************************************************************************
+ * arch/rgmp/src/nuttx.c
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#include <rgmp/boot.h>
+#include <rgmp/pmap.h>
+#include <rgmp/assert.h>
+#include <rgmp/spinlock.h>
+#include <rgmp/string.h>
+
+#include <rgmp/arch/arch.h>
+#include <rgmp/arch/console.h>
+
+#include <nuttx/sched.h>
+#include <nuttx/kmalloc.h>
+#include <nuttx/arch.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <arch/irq.h>
+#include <arch/arch.h>
+#include <os_internal.h>
+
+_TCB *current_task = NULL;
+
+
+/**
+ * This function is called in non-interrupt context
+ * to switch tasks.
+ * Assumption: global interrupt is disabled.
+ */
+static inline void up_switchcontext(_TCB *ctcb, _TCB *ntcb)
+{
+    // do nothing if two tasks are the same
+    if (ctcb == ntcb)
+	return;
+
+    // this function can not be called in interrupt
+    if (up_interrupt_context()) {
+	panic("%s: try to switch context in interrupt\n", __func__);
+    }
+
+    // start switch
+    current_task = ntcb;
+    rgmp_context_switch(ctcb?&ctcb->xcp.tf:NULL, ntcb->xcp.tf);
+}
+
+void up_initialize(void)
+{
+    extern pidhash_t g_pidhash[];
+    extern void up_register_bridges(void);
+    extern void vnet_initialize(void);
+    extern void nuttx_arch_init(void);
+
+    // intialize the current_task to g_idletcb
+    current_task = g_pidhash[PIDHASH(0)].tcb;
+
+    // setup console
+    up_register_bridges();
+
+#ifdef CONFIG_NET_VNET
+    // setup vnet device
+    vnet_initialize();
+#endif
+
+    nuttx_arch_init();
+
+    // enable interrupt
+    local_irq_enable();
+}
+
+void up_idle(void)
+{
+    arch_hlt();
+}
+
+void up_allocate_heap(void **heap_start, size_t *heap_size)
+{
+    *heap_start = boot_freemem;
+    *heap_size = KERNBASE + boot_param.mem_size - (uint32_t)boot_freemem;
+}
+
+int up_create_stack(_TCB *tcb, size_t stack_size)
+{
+    int ret = ERROR;
+    size_t *adj_stack_ptr;
+
+    /* Move up to next even word boundary if necessary */
+
+    size_t adj_stack_size = (stack_size + 3) & ~3;
+    size_t adj_stack_words = adj_stack_size >> 2;
+
+    /* Allocate the memory for the stack */
+
+    uint32_t *stack_alloc_ptr = (uint32_t*)kmalloc(adj_stack_size);
+    if (stack_alloc_ptr) {
+	/* This is the address of the last word in the allocation */
+
+	adj_stack_ptr = &stack_alloc_ptr[adj_stack_words - 1];
+
+	/* Save the values in the TCB */
+
+	tcb->adj_stack_size  = adj_stack_size;
+	tcb->stack_alloc_ptr = stack_alloc_ptr;
+	tcb->adj_stack_ptr   = (void *)((unsigned int)adj_stack_ptr & ~7);
+	ret = OK;
+    }
+    return ret;
+}
+
+int up_use_stack(_TCB *tcb, void *stack, size_t stack_size)
+{
+    /* Move up to next even word boundary if necessary */
+
+    size_t adj_stack_size = stack_size & ~3;
+    size_t adj_stack_words = adj_stack_size >> 2;
+
+    /* This is the address of the last word in the allocation */
+
+    size_t *adj_stack_ptr = &((size_t*)stack)[adj_stack_words - 1];
+
+    /* Save the values in the TCB */
+
+    tcb->adj_stack_size  = adj_stack_size;
+    tcb->stack_alloc_ptr = stack;
+    tcb->adj_stack_ptr   = (void *)((unsigned int)adj_stack_ptr & ~7);
+    return OK;
+}
+
+void up_release_stack(_TCB *dtcb)
+{
+    if (dtcb->stack_alloc_ptr) {
+	free(dtcb->stack_alloc_ptr);
+    }
+
+    dtcb->stack_alloc_ptr = NULL;
+    dtcb->adj_stack_size  = 0;
+    dtcb->adj_stack_ptr   = NULL;
+}
+
+/****************************************************************************
+ * Name: up_block_task
+ *
+ * Description:
+ *   The currently executing task at the head of
+ *   the ready to run list must be stopped.  Save its context
+ *   and move it to the inactive list specified by task_state.
+ *
+ *   This function is called only from the NuttX scheduling
+ *   logic.  Interrupts will always be disabled when this
+ *   function is called.
+ *
+ * Inputs:
+ *   tcb: Refers to a task in the ready-to-run list (normally
+ *     the task at the head of the list).  It most be
+ *     stopped, its context saved and moved into one of the
+ *     waiting task lists.  It it was the task at the head
+ *     of the ready-to-run list, then a context to the new
+ *     ready to run task must be performed.
+ *   task_state: Specifies which waiting task list should be
+ *     hold the blocked task TCB.
+ *
+ ****************************************************************************/
+void up_block_task(_TCB *tcb, tstate_t task_state)
+{
+    /* Verify that the context switch can be performed */
+    if ((tcb->task_state < FIRST_READY_TO_RUN_STATE) ||
+	(tcb->task_state > LAST_READY_TO_RUN_STATE)) {
+	warn("%s: task sched error\n", __func__);
+	return;
+    }
+    else {
+	_TCB *rtcb = current_task;
+	bool switch_needed;
+
+	/* Remove the tcb task from the ready-to-run list.  If we
+	 * are blocking the task at the head of the task list (the
+	 * most likely case), then a context switch to the next
+	 * ready-to-run task is needed. In this case, it should
+	 * also be true that rtcb == tcb.
+	 */
+	switch_needed = sched_removereadytorun(tcb);
+
+	/* Add the task to the specified blocked task list */
+	sched_addblocked(tcb, (tstate_t)task_state);
+
+	/* Now, perform the context switch if one is needed */
+	if (switch_needed) {
+	    _TCB *nexttcb;
+	    // this part should not be executed in interrupt context
+	    if (up_interrupt_context()) {
+		panic("%s: %d\n", __func__, __LINE__);
+	    }
+	    // If there are any pending tasks, then add them to the g_readytorun
+	    // task list now. It should be the up_realease_pending() called from
+	    // sched_unlock() to do this for disable preemption. But it block 
+	    // itself, so it's OK.
+	    if (g_pendingtasks.head) {
+		warn("Disable preemption failed for task block itself\n");
+		sched_mergepending();
+	    }
+	    nexttcb = (_TCB*)g_readytorun.head;
+	    // context switch
+	    up_switchcontext(rtcb, nexttcb);
+        }
+    }
+}
+
+/****************************************************************************
+ * Name: up_unblock_task
+ *
+ * Description:
+ *   A task is currently in an inactive task list
+ *   but has been prepped to execute.  Move the TCB to the
+ *   ready-to-run list, restore its context, and start execution.
+ *
+ * Inputs:
+ *   tcb: Refers to the tcb to be unblocked.  This tcb is
+ *     in one of the waiting tasks lists.  It must be moved to
+ *     the ready-to-run list and, if it is the highest priority
+ *     ready to run taks, executed.
+ *
+ ****************************************************************************/
+void up_unblock_task(_TCB *tcb)
+{
+    /* Verify that the context switch can be performed */
+    if ((tcb->task_state < FIRST_BLOCKED_STATE) ||
+	(tcb->task_state > LAST_BLOCKED_STATE)) {
+	warn("%s: task sched error\n", __func__);
+	return;
+    }
+    else {
+	_TCB *rtcb = current_task;
+
+	/* Remove the task from the blocked task list */
+	sched_removeblocked(tcb);
+
+	/* Reset its timeslice.  This is only meaningful for round
+	 * robin tasks but it doesn't here to do it for everything
+	 */
+#if CONFIG_RR_INTERVAL > 0
+	tcb->timeslice = CONFIG_RR_INTERVAL / MSEC_PER_TICK;
+#endif
+	
+	// Add the task in the correct location in the prioritized
+	// g_readytorun task list.
+	if (sched_addreadytorun(tcb) && !up_interrupt_context()) {
+	    /* The currently active task has changed! */
+	    _TCB *nexttcb = (_TCB*)g_readytorun.head;
+	    // context switch
+	    up_switchcontext(rtcb, nexttcb);
+	}
+    }
+}
+
+/**
+ * This function is called from sched_unlock() which will check not
+ * in interrupt context and disable interrupt.
+ */
+void up_release_pending(void)
+{
+    _TCB *rtcb = current_task;
+
+    /* Merge the g_pendingtasks list into the g_readytorun task list */
+
+    if (sched_mergepending()) {
+	/* The currently active task has changed! */
+	_TCB *nexttcb = (_TCB*)g_readytorun.head;
+
+	// context switch
+	up_switchcontext(rtcb, nexttcb);
+    }
+}
+
+void up_reprioritize_rtr(_TCB *tcb, uint8_t priority)
+{
+    /* Verify that the caller is sane */
+
+    if (tcb->task_state < FIRST_READY_TO_RUN_STATE ||
+	tcb->task_state > LAST_READY_TO_RUN_STATE
+#if SCHED_PRIORITY_MIN > UINT8_MIN
+	|| priority < SCHED_PRIORITY_MIN
+#endif
+#if SCHED_PRIORITY_MAX < UINT8_MAX
+	|| priority > SCHED_PRIORITY_MAX
+#endif
+	) {
+	warn("%s: task sched error\n", __func__);
+	return;
+    }
+    else {
+	_TCB *rtcb = current_task;
+	bool switch_needed;
+
+	/* Remove the tcb task from the ready-to-run list.
+	 * sched_removereadytorun will return true if we just
+	 * remove the head of the ready to run list.
+	 */
+	switch_needed = sched_removereadytorun(tcb);
+
+	/* Setup up the new task priority */
+	tcb->sched_priority = (uint8_t)priority;
+
+	/* Return the task to the specified blocked task list.
+	 * sched_addreadytorun will return true if the task was
+	 * added to the new list.  We will need to perform a context
+	 * switch only if the EXCLUSIVE or of the two calls is non-zero
+	 * (i.e., one and only one the calls changes the head of the
+	 * ready-to-run list).
+	 */
+	switch_needed ^= sched_addreadytorun(tcb);
+
+	/* Now, perform the context switch if one is needed */
+	if (switch_needed && !up_interrupt_context()) {
+	    _TCB *nexttcb;
+	    // If there are any pending tasks, then add them to the g_readytorun
+	    // task list now. It should be the up_realease_pending() called from
+	    // sched_unlock() to do this for disable preemption. But it block 
+	    // itself, so it's OK.
+	    if (g_pendingtasks.head) {
+		warn("Disable preemption failed for reprioritize task\n");
+		sched_mergepending();
+            }
+
+	    nexttcb = (_TCB*)g_readytorun.head;
+	    // context switch
+	    up_switchcontext(rtcb, nexttcb);
+        }
+    }
+}
+
+void _exit(int status)
+{
+    _TCB* tcb;
+
+    /* Destroy the task at the head of the ready to run list. */
+
+    (void)task_deletecurrent();
+
+    /* Now, perform the context switch to the new ready-to-run task at the
+     * head of the list.
+     */
+
+    tcb = (_TCB*)g_readytorun.head;
+
+    /* Then switch contexts */
+
+    up_switchcontext(NULL, tcb);
+}
+
+void up_assert(const uint8_t *filename, int line)
+{
+    fprintf(stderr, "Assertion failed at file:%s line: %d\n", filename, line);
+
+    // in interrupt context or idle task means kernel error 
+    // which will stop the OS
+    // if in user space just terminate the task
+    if (up_interrupt_context() || current_task->pid == 0) {
+	panic("%s: %d\n", __func__, __LINE__);
+    }
+    else {
+	exit(EXIT_FAILURE);
+    }
+}
+
+void up_assert_code(const uint8_t *filename, int line, int code)
+{
+    fprintf(stderr, "Assertion failed at file:%s line: %d error code: %d\n", 
+	    filename, line, code);
+
+    // in interrupt context or idle task means kernel error 
+    // which will stop the OS
+    // if in user space just terminate the task
+    if (up_interrupt_context() || current_task->pid == 0) {
+	panic("%s: %d\n", __func__, __LINE__);
+    }
+    else {
+	exit(EXIT_FAILURE);
+    }
+}
+
+
+#ifndef CONFIG_DISABLE_SIGNALS
+
+void up_schedule_sigaction(_TCB *tcb, sig_deliver_t sigdeliver)
+{
+    /* Refuse to handle nested signal actions */
+    if (!tcb->xcp.sigdeliver) {
+	int flags;
+
+	/* Make sure that interrupts are disabled */
+	flags = pushcli();
+
+	// First, handle some special cases when the signal is
+	// being delivered to the currently executing task.
+	if (tcb == current_task) {
+	    // CASE 1:  We are not in an interrupt handler and
+	    // a task is signalling itself for some reason.
+	    if (!up_interrupt_context()) {
+		// In this case just deliver the signal now.
+		sigdeliver(tcb);
+	    }
+	    // CASE 2:  We are in an interrupt handler AND the
+	    // interrupted task is the same as the one that
+	    // must receive the signal.
+	    else {
+		tcb->xcp.sigdeliver = sigdeliver;
+            }
+        }
+
+	// Otherwise, we are (1) signaling a task is not running
+	// from an interrupt handler or (2) we are not in an
+	// interrupt handler and the running task is signalling
+	// some non-running task.
+	else {
+	    tcb->xcp.sigdeliver = sigdeliver;
+	    push_xcptcontext(&tcb->xcp);
+        }
+
+	popcli(flags);
+    }
+}
+
+#endif /* !CONFIG_DISABLE_SIGNALS */
+
+
+bool up_interrupt_context(void)
+{
+    if (nest_irq)
+	return true;
+    return false;
+}
+
+#ifndef CONFIG_ARCH_NOINTC
+void up_disable_irq(int irq)
+{
+
+}
+
+void up_enable_irq(int irq)
+{
+
+}
+#endif
+
+#ifdef CONFIG_ARCH_IRQPRIO
+int up_prioritize_irq(int irq, int priority)
+{
+
+}
+#endif
+
+void up_sigdeliver(struct Trapframe *tf)
+{
+    sig_deliver_t sigdeliver;
+    
+    pop_xcptcontext(&current_task->xcp);
+    sigdeliver = current_task->xcp.sigdeliver;
+    current_task->xcp.sigdeliver = NULL;
+    local_irq_enable();
+    sigdeliver(current_task);
+    local_irq_disable();
+}
+
+
+
+
+
+
+
diff --git a/nuttx/arch/rgmp/src/rgmp.c b/nuttx/arch/rgmp/src/rgmp.c
new file mode 100644
index 000000000..40fad1f87
--- /dev/null
+++ b/nuttx/arch/rgmp/src/rgmp.c
@@ -0,0 +1,168 @@
+/****************************************************************************
+ * arch/rgmp/src/rgmp.c
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#include <rgmp/trap.h>
+#include <rgmp/mmu.h>
+#include <rgmp/arch/arch.h>
+
+#include <nuttx/config.h>
+#include <nuttx/init.h>
+#include <nuttx/arch.h>
+#include <nuttx/sched.h>
+#include <nuttx/kmalloc.h>
+#include <semaphore.h>
+#include <queue.h>
+#include <stdlib.h>
+#include <arch/arch.h>
+#include <os_internal.h>
+
+int nest_irq = 0;
+
+// the default time is 10ms
+#ifdef CONFIG_MSEC_PER_TICK
+unsigned int rtos_tick_time = CONFIG_MSEC_PER_TICK;
+#else
+unsigned int rtos_tick_time = 10;
+#endif
+
+void rtos_entry(void)
+{
+    os_start();
+}
+
+void *rtos_get_page(void)
+{
+    return memalign(PTMEMSIZE, PTMEMSIZE);
+}
+
+void rtos_free_page(void *page)
+{
+    free(page);
+}
+
+/**
+ * The interrupt can be nested. The pair of rtos_enter_interrupt()
+ * and rtos_exit_interrupt() make sure the context switch is 
+ * performed only in the last IRQ exit.
+ */
+void rtos_enter_interrupt(struct Trapframe *tf)
+{
+    nest_irq++;
+}
+
+void rtos_exit_interrupt(struct Trapframe *tf)
+{
+    local_irq_disable();
+    nest_irq--;
+    if (!nest_irq) {
+	_TCB *rtcb = current_task;
+	_TCB *ntcb;
+
+	if (rtcb->xcp.sigdeliver) {
+	    rtcb->xcp.tf = tf;
+	    push_xcptcontext(&rtcb->xcp);
+	}
+	ntcb = (_TCB*)g_readytorun.head;
+	// switch needed
+	if (rtcb != ntcb) {
+	    rtcb->xcp.tf = tf;
+	    current_task = ntcb;
+	    rgmp_pop_tf(ntcb->xcp.tf);
+	}
+    }
+}
+
+void rtos_timer_isr(struct Trapframe *tf)
+{
+    sched_process_timer();
+}
+
+/**
+ * RTOS mutex operation
+ */
+const int rtos_mutex_size = sizeof(sem_t);
+void rtos_mutex_init(void *lock)
+{
+    sem_init(lock, 0, 1);
+}
+
+int rtos_mutex_lock(void *lock)
+{
+    return sem_wait(lock);
+}
+
+int rtos_mutex_unlock(void *lock)
+{
+    return sem_post(lock);
+}
+
+/**
+ * RTOS semaphore operation
+ */
+const int rtos_semaphore_size = sizeof(sem_t);
+
+void rtos_sem_init(void *sem, int val)
+{
+    sem_init(sem, 0, val);
+}
+
+int rtos_sem_up(void *sem)
+{
+    return sem_post(sem);
+}
+
+int rtos_sem_down(void *sem)
+{
+    return sem_wait(sem);
+}
+
+void rtos_stop_running(void)
+{
+    extern void nuttx_arch_exit(void);
+
+    local_irq_disable();
+
+    nuttx_arch_exit();
+
+    while(1) {
+	arch_hlt();
+    }
+}
+
+
diff --git a/nuttx/arch/rgmp/src/x86/Make.defs b/nuttx/arch/rgmp/src/x86/Make.defs
new file mode 100644
index 000000000..5fb40006e
--- /dev/null
+++ b/nuttx/arch/rgmp/src/x86/Make.defs
@@ -0,0 +1,42 @@
+############################################################################
+# rgmp/x86/Make.defs
+#
+#   Copyright (C) 2011 Yu Qiang. All rights reserved.
+#   Author: Yu Qiang <yuq825@gmail.com>
+#
+# This file is a part of NuttX:
+# 
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name Gregory Nutt nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+RGMP_ARCH_ASRCS = sigentry.S
+RGMP_ARCH_CSRCS = com.c arch_nuttx.c
diff --git a/nuttx/arch/rgmp/src/x86/arch_nuttx.c b/nuttx/arch/rgmp/src/x86/arch_nuttx.c
new file mode 100644
index 000000000..c7b7577f3
--- /dev/null
+++ b/nuttx/arch/rgmp/src/x86/arch_nuttx.c
@@ -0,0 +1,106 @@
+/****************************************************************************
+ * arch/rgmp/src/x86/arch_nuttx.c
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#include <rgmp/pmap.h>
+#include <rgmp/string.h>
+#include <rgmp/arch/fpu.h>
+
+#include <arch/arch.h>
+#include <nuttx/sched.h>
+#include <os_internal.h>
+
+
+void nuttx_arch_init(void)
+{
+    extern void e1000_mod_init(void);
+    extern void up_serialinit(void);
+
+    // setup COM device
+    up_serialinit();
+
+#ifdef CONFIG_NET_E1000
+    // setup e1000
+    e1000_mod_init();
+#endif
+
+}
+
+void nuttx_arch_exit(void)
+{
+    extern void e1000_mod_exit(void);
+
+#ifdef CONFIG_NET_E1000
+    e1000_mod_exit();
+#endif
+
+}
+
+void up_initial_state(_TCB *tcb)
+{
+    struct Trapframe *tf;
+
+    if (tcb->pid != 0) {
+	tf = (struct Trapframe *)tcb->adj_stack_ptr-1;
+	memset(tf, 0, sizeof(struct Trapframe));
+	tf->tf_fpu = rgmp_fpu_init_regs;
+	tf->tf_eflags = 0x00000202;
+	tf->tf_cs = GD_KT;
+	tf->tf_ds = GD_KD;
+	tf->tf_es = GD_KD;
+	tf->tf_eip = (uint32_t)tcb->start;
+	tcb->xcp.tf = tf;
+    }
+}
+
+void push_xcptcontext(struct xcptcontext *xcp)
+{
+    xcp->save_eip = xcp->tf->tf_eip;
+    xcp->save_eflags = xcp->tf->tf_eflags;
+
+    // set up signal entry with interrupts disabled
+    xcp->tf->tf_eip = (uint32_t)up_sigentry;
+    xcp->tf->tf_eflags = 0;
+}
+
+void pop_xcptcontext(struct xcptcontext *xcp)
+{
+    xcp->tf->tf_eip = xcp->save_eip;
+    xcp->tf->tf_eflags = xcp->save_eflags;
+}
+
diff --git a/nuttx/arch/rgmp/src/x86/com.c b/nuttx/arch/rgmp/src/x86/com.c
new file mode 100644
index 000000000..36ca15238
--- /dev/null
+++ b/nuttx/arch/rgmp/src/x86/com.c
@@ -0,0 +1,631 @@
+/****************************************************************************
+ * arch/rgmp/src/x86/com.c
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Authors: Yu Qiang <yuq825@gmail.com>
+ *            Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <semaphore.h>
+#include <string.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/serial.h>
+#include <nuttx/kmalloc.h>
+
+#include <arch/com.h>
+
+#include <rgmp/trap.h>
+#include <rgmp/arch/console.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define COM1            0x3F8
+#define COM2            0x2f8
+#define COM3            0x3e8
+#define COM4            0x2e8
+
+#define COM_RX          0       // In:        Receive buffer (DLAB=0)
+#define COM_DLL         0       // Out: Divisor Latch Low (DLAB=1)
+#define COM_TX          0       // Out: Transmit buffer (DLAB=0)
+#define COM_DLM         1       // Out: Divisor Latch High (DLAB=1)
+#define COM_IER         1       // Out: Interrupt Enable Register
+#define   COM_IER_TEI   0x02    //   Enable transmit buffer empty interrupt
+#define   COM_IER_RDI   0x01    //   Enable receiver data interrupt
+#define COM_IIR         2       // In:        Interrupt ID Register
+#define COM_FCR         2       // Out: FIFO Control Register
+#define COM_LCR         3       // Out: Line Control Register
+#define   COM_LCR_DLAB  0x80    //   Divisor latch access bit
+#define   COM_LCR_WLEN8 0x03    //   Wordlength: 8 bits
+#define COM_MCR         4       // Out: Modem Control Register
+#define   COM_MCR_RTS   0x02    // RTS complement
+#define   COM_MCR_DTR   0x01    // DTR complement
+#define   COM_MCR_OUT2  0x08    // Out2 complement
+#define COM_LSR         5       // In:        Line Status Register
+#define   COM_LSR_DATA  0x01    //   Data available
+#define   COM_LSR_ETR   0x20    //   buffer has space
+#define   COM_LSR_EDR   0x40    //   buffer empty
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+#ifndef CONFIG_COM_RXBUFSIZE
+#define CONFIG_COM_RXBUFSIZE    64
+#endif
+
+#ifndef CONFIG_COM_TXBUFSIZE
+#define CONFIG_COM_TXBUFSIZE    64
+#endif
+
+struct up_dev_s
+{
+    unsigned int         base;          /* Base address of COM registers */
+    unsigned int         baud;                /* Configured baud */
+    int                  irq;                /* IRQ associated with this COM */
+    struct irq_action    action;
+    union {
+        uint8_t val;
+        struct {
+            unsigned bits     : 2;      /* 3=8 bits, 2=7 bits, 1=6 bits, 0=5 bits */
+            unsigned stopbits : 1;      /* 0=1 stop bit, 1=2 stop bits */
+            unsigned parity   : 3;      /* xx0=none, 001=odd, 011=even */
+            unsigned ebreak   : 1;
+            unsigned dlab     : 1;
+        } sep;
+    } lcr;
+    char rxbuff[CONFIG_COM_RXBUFSIZE];  /* receive buffer */
+    char txbuff[CONFIG_COM_TXBUFSIZE];  /* transmit buffer */
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static int  up_setup(struct uart_dev_s *dev);
+static void up_shutdown(struct uart_dev_s *dev);
+static int  up_attach(struct uart_dev_s *dev);
+static void up_detach(struct uart_dev_s *dev);
+static irqreturn_t up_com_int_handler(struct Trapframe *tf, void *dev_id);
+static int  up_ioctl(struct file *filep, int cmd, unsigned long arg);
+static int  up_receive(struct uart_dev_s *dev, unsigned int *status);
+static void up_rxint(struct uart_dev_s *dev, bool enable);
+static bool up_rxavailable(struct uart_dev_s *dev);
+static void up_send(struct uart_dev_s *dev, int ch);
+static void up_txint(struct uart_dev_s *dev, bool enable);
+static bool up_txready(struct uart_dev_s *dev);
+static bool up_txempty(struct uart_dev_s *dev);
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+static struct uart_ops_s g_com_ops =
+{
+    .setup          = up_setup,
+    .shutdown       = up_shutdown,
+    .attach         = up_attach,
+    .detach         = up_detach,
+    .ioctl          = up_ioctl,
+    .receive        = up_receive,
+    .rxint          = up_rxint,
+    .rxavailable    = up_rxavailable,
+    .send           = up_send,
+    .txint          = up_txint,
+    .txready        = up_txready,
+    .txempty        = up_txempty,
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_alloc_com
+ ****************************************************************************/
+
+static uart_dev_t *up_alloc_com(unsigned int base, int irq)
+{
+    uart_dev_t *dev;
+    struct up_dev_s *priv;
+
+    priv = kzalloc(sizeof(struct up_dev_s));
+    if (priv == NULL)
+        goto err0;
+
+    dev = kzalloc(sizeof(uart_dev_t));
+    if (dev == NULL)
+        goto err1;
+
+    priv->base = base;
+    priv->irq = irq;
+    priv->baud = 115200;
+    priv->lcr.val = 0;
+    priv->lcr.sep.parity = 0;
+    priv->lcr.sep.bits = 3;
+    priv->lcr.sep.stopbits = 0;
+    priv->action.handler = up_com_int_handler;
+    priv->action.dev_id = dev;
+
+    dev->recv.size = CONFIG_COM_RXBUFSIZE;
+    dev->recv.buffer = priv->rxbuff;
+    dev->xmit.size = CONFIG_COM_TXBUFSIZE;
+    dev->xmit.buffer = priv->txbuff;
+    dev->ops = &g_com_ops;
+    dev->priv = priv;
+
+    return dev;
+
+ err1:
+    kfree(priv);
+ err0:
+    return NULL;
+}
+
+/****************************************************************************
+ * Name: up_alloc_com
+ ****************************************************************************/
+
+static inline void up_free_com(uart_dev_t *com)
+{
+    kfree(com->priv);
+    kfree(com);
+}
+
+/****************************************************************************
+ * Name: up_setup
+ *
+ * Description:
+ *   Configure the UART baud, bits, parity, fifos, etc. This
+ *   method is called the first time that the serial port is
+ *   opened.
+ *
+ ****************************************************************************/
+
+static int up_setup(struct uart_dev_s *dev)
+{
+    struct up_dev_s *priv = dev->priv;
+    uint16_t base = priv->base;
+    union {
+        uint16_t val;
+        struct {
+            uint8_t low;
+            uint8_t high;
+        } sep;
+    } data;
+
+    // clear and disable FIFO
+    outb(base+COM_FCR, 1);
+    outb(base+COM_FCR, 3);
+    outb(base+COM_FCR, 0);
+
+    // Clear any preexisting overrun indications and interrupts
+    // Serial port doesn't exist if COM_LSR returns 0xFF
+    inb(base+COM_LSR);
+    inb(base+COM_IIR);
+    inb(base+COM_RX);
+    if (inb(base+COM_LSR) == 0xff) {
+        dbg("COM %d does not exist\n", base);
+        return -1;
+    }
+
+    // Set speed; requires DLAB latch
+    outb(base+COM_LCR, COM_LCR_DLAB);
+    data.val = 115200 / priv->baud;
+    outb(base+COM_DLL, data.sep.low);
+    outb(base+COM_DLM, data.sep.high);
+
+    // set data bits, stop bit, parity; turn off DLAB latch
+    outb(base+COM_LCR, priv->lcr.val);
+
+    // OUT2 must be set to enable interrupt
+    outb(base+COM_MCR, COM_MCR_OUT2);
+
+    // setup FIFO
+    outb(base+COM_FCR, 1);
+
+    // disable COM interrupts
+    outb(base+COM_IER, 0);
+
+    return OK;
+}
+
+/****************************************************************************
+ * Name: up_shutdown
+ *
+ * Description:
+ *   Disable the UART.  This method is called when the serial port is closed
+ *
+ ****************************************************************************/
+
+static void up_shutdown(struct uart_dev_s *dev)
+{
+    struct up_dev_s *priv = dev->priv;
+    uint16_t base = priv->base;
+
+    // disable COM interrupts
+    outb(base+COM_IER, 0);
+}
+
+/****************************************************************************
+ * Name: up_attach
+ *
+ * Description:
+ *   Configure the UART to operation in interrupt driven mode.  This method is
+ *   called when the serial port is opened.  Normally, this is just after the
+ *   the setup() method is called, however, the serial console may operate in
+ *   a non-interrupt driven mode during the boot phase.
+ *
+ *   RX and TX interrupts are not enabled when by the attach method (unless the
+ *   hardware supports multiple levels of interrupt enabling).  The RX and TX
+ *   interrupts are not enabled until the txint() and rxint() methods are called.
+ *
+ ****************************************************************************/
+
+static int up_attach(struct uart_dev_s *dev)
+{
+    struct up_dev_s *priv = dev->priv;
+    int err;
+
+    err = rgmp_request_irq(priv->irq, &priv->action, 0);
+  
+    return err;
+}
+
+/****************************************************************************
+ * Name: up_detach
+ *
+ * Description:
+ *   Detach UART interrupts.  This method is called when the serial port is
+ *   closed normally just before the shutdown method is called.  The exception is
+ *   the serial console which is never shutdown.
+ *
+ ****************************************************************************/
+
+static void up_detach(struct uart_dev_s *dev)
+{
+    struct up_dev_s *priv = dev->priv;
+
+    rgmp_free_irq(priv->irq, &priv->action);
+}
+
+/****************************************************************************
+ * Name: up_com_int_handler
+ *
+ * Description:
+ *   This is the UART interrupt handler.  It will be invoked
+ *   when an interrupt received on the 'irq'  It should call
+ *   uart_transmitchars or uart_receivechar to perform the
+ *   appropriate data transfers.  The interrupt handling logic\
+ *   must be able to map the 'irq' number into the approprite
+ *   uart_dev_s structure in order to call these functions.
+ *
+ ****************************************************************************/
+
+static irqreturn_t up_com_int_handler(struct Trapframe *tf, void *dev_id)
+{
+    struct uart_dev_s *dev = dev_id;
+    struct up_dev_s   *priv = dev->priv;
+    uint16_t base = priv->base;
+    //uint8_t cause = inb(base+COM_IIR);
+    uint8_t state = inb(base+COM_LSR);
+
+    if (state & COM_LSR_DATA)
+        uart_recvchars(dev);
+
+    if (state & COM_LSR_ETR)
+        uart_xmitchars(dev);
+
+    return IRQ_HANDLED;
+}
+
+/****************************************************************************
+ * Name: up_ioctl
+ *
+ * Description:
+ *   All ioctl calls will be routed through this method
+ *
+ ****************************************************************************/
+
+static int up_ioctl(struct file *filep, int cmd, unsigned long arg)
+{
+    struct inode      *inode = filep->f_inode;
+    struct uart_dev_s *dev   = inode->i_private;
+    struct up_dev_s   *priv  = (struct up_dev_s*)dev->priv;
+    
+    switch (cmd) {
+    case COM_SET_BAUD:
+        priv->baud = arg;
+        break;
+    case COM_SET_PARITY:
+        priv->lcr.sep.parity = arg;
+        break;
+    case COM_SET_STOPBITS:
+        priv->lcr.sep.stopbits = arg;
+        break;
+    case COM_SET_BITS:
+        priv->lcr.sep.bits = arg;
+        break;
+    default:
+        return ERROR;
+    }
+
+    if (up_setup(dev) != OK)
+        return ERROR;
+
+    up_rxint(dev, 1);
+
+    return OK;
+}
+
+/****************************************************************************
+ * Name: up_receive
+ *
+ * Description:
+ * Called (usually) from the interrupt level to receive one character from
+ * the UART.  Error bits associated with the receipt are provided in the
+ * the return 'status'.
+ *
+ ****************************************************************************/
+
+static int up_receive(struct uart_dev_s *dev, unsigned int *status)
+{
+    struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
+    uint16_t base = priv->base;
+
+    return inb(base+COM_RX);
+}
+
+/****************************************************************************
+ * Name: up_rxint
+ *
+ * Description:
+ *   Call to enable or disable RX interrupts
+ *
+ ****************************************************************************/
+
+static void up_rxint(struct uart_dev_s *dev, bool enable)
+{
+    struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
+    uint16_t base = priv->base;
+    uint8_t ier;
+
+    ier = inb(base+COM_IER);
+    if (enable)
+        ier |= COM_IER_RDI;
+    else
+        ier &= ~COM_IER_RDI;
+    outb(base+COM_IER, ier);
+}
+
+/****************************************************************************
+ * Name: up_rxavailable
+ *
+ * Description:
+ *   Return true if the receive fifo is not empty
+ *
+ ****************************************************************************/
+
+static bool up_rxavailable(struct uart_dev_s *dev)
+{
+    struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
+    uint16_t base = priv->base;
+
+    return inb(base+COM_LSR) & COM_LSR_DATA;
+}
+
+/****************************************************************************
+ * Name: up_send
+ *
+ * Description:
+ *   This method will send one byte on the UART
+ *
+ ****************************************************************************/
+
+static void up_send(struct uart_dev_s *dev, int ch)
+{
+    struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
+    uint16_t base = priv->base;
+
+    outb(base+COM_TX, ch);
+}
+
+/****************************************************************************
+ * Name: up_txint
+ *
+ * Description:
+ *   Call to enable or disable TX interrupts
+ *
+ ****************************************************************************/
+
+static void up_txint(struct uart_dev_s *dev, bool enable)
+{
+    struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
+    uint16_t base = priv->base;
+    irqstate_t flags;
+    uint8_t ier;
+
+    flags = irqsave();
+    ier = inb(base+COM_IER);
+    if (enable) {
+        ier |= COM_IER_TEI;
+        outb(base+COM_IER, ier);
+
+        /* Fake a TX interrupt here by just calling uart_xmitchars() with
+         * interrupts disabled (note this may recurse).
+         */
+
+        uart_xmitchars(dev);
+    }
+    else {
+        ier &= ~COM_IER_TEI;
+        outb(base+COM_IER, ier);
+    }
+    irqrestore(flags);
+}
+
+/****************************************************************************
+ * Name: up_txready
+ *
+ * Description:
+ *   Return true if the tranmsit fifo is not full
+ *
+ ****************************************************************************/
+
+static bool up_txready(struct uart_dev_s *dev)
+{
+    struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
+    uint16_t base = priv->base;
+
+    return inb(base+COM_LSR) & COM_LSR_ETR;
+}
+
+/****************************************************************************
+ * Name: up_txempty
+ *
+ * Description:
+ *   Return true if the transmit fifo is empty
+ *
+ ****************************************************************************/
+
+static bool up_txempty(struct uart_dev_s *dev)
+{
+    struct up_dev_s *priv = (struct up_dev_s*)dev->priv;
+    uint16_t base = priv->base;
+
+    return inb(base+COM_LSR) & COM_LSR_EDR;
+}
+
+/****************************************************************************
+ * Public Funtions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_serialinit
+ *
+ * Description:
+ *   Performs the low level UART initialization early in 
+ *   debug so that the serial console will be available
+ *   during bootup.  This must be called before up_serialinit.
+ *
+ ****************************************************************************/
+
+void up_earlyserialinit(void)
+{
+    
+}
+
+/****************************************************************************
+ * Name: up_serialinit
+ *
+ * Description:
+ *   Register serial console and serial ports.  This assumes
+ *   that up_earlyserialinit was called previously.
+ *
+ ****************************************************************************/
+
+void up_serialinit(void)
+{
+    uart_dev_t *dev;
+    int err;
+
+#ifdef CONFIG_COM1
+    dev = up_alloc_com(COM1, 4);
+    if (dev == NULL)
+        dbg("alloc com1 fail\n");
+    else {
+        err = uart_register("/dev/ttyS0", dev);
+        if (err)
+            dbg("register com1 fail\n");
+    }
+#endif
+#ifdef CONFIG_COM2
+    dev = up_alloc_com(COM2, 3);
+    if (dev == NULL)
+        dbg("alloc com2 fail\n");
+    else {
+        err = uart_register("/dev/ttyS1", dev);
+        if (err)
+            dbg("register com2 fail\n");
+    }
+#endif
+#ifdef CONFIG_COM3
+    dev = up_alloc_com(COM3, 4);
+    if (dev == NULL)
+        dbg("alloc com3 fail\n");
+    else {
+        err = uart_register("/dev/ttyS2", dev);
+        if (err)
+            dbg("register com3 fail\n");
+    }
+#endif
+#ifdef CONFIG_COM4
+    dev = up_alloc_com(COM4, 3);
+    if (dev == NULL)
+        dbg("alloc com4 fail\n");
+    else {
+        err = uart_register("/dev/ttyS3", dev);
+        if (err)
+            dbg("register com4 fail\n");
+    }
+#endif
+}
+
+/****************************************************************************
+ * Name: up_putc
+ *
+ * Description:
+ *   Provide priority, low-level access to support OS debug
+ *   writes
+ *
+ ****************************************************************************/
+
+int up_putc(int ch)
+{
+    cons_putc(ch);
+    return ch;
+}
+
diff --git a/nuttx/arch/rgmp/src/x86/sigentry.S b/nuttx/arch/rgmp/src/x86/sigentry.S
new file mode 100644
index 000000000..98891c026
--- /dev/null
+++ b/nuttx/arch/rgmp/src/x86/sigentry.S
@@ -0,0 +1,55 @@
+/****************************************************************************
+ * arch/rgmp/src/x86/sigentry.S
+ *
+ *   Copyright (C) 2011 Yu Qiang. All rights reserved.
+ *   Author: Yu Qiang <yuq825@gmail.com>
+ *
+ * This file is a part of NuttX:
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+	.globl up_sigentry
+up_sigentry:
+	subl $172, %esp    # 172 is the size of TrapFrame
+	pushl %esp
+	movl %esp, %eax
+	call up_sigdeliver
+	addl $8, %esp      # skip parameter and current_task
+	frstor 0(%esp)
+  	addl $108, %esp
+	popal
+	popl %es
+	popl %ds
+	addl $0x8, %esp # trapno and errcode
+	iret
+
+	
\ No newline at end of file