First set of changes to incorporate the RGMP port

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3595 42af7a65-404d-4744-a932-0658087f49c3

30 files changed, 3896 insertions, 6 deletions

diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog
index 59cb892e3..3c6e0a8ac 100644
--- a/nuttx/ChangeLog
+++ b/nuttx/ChangeLog
@@ -1737,3 +1737,11 @@
 	  interpreter has been moved to apps/interpreter/Makefile.
 	* tools/mkdep.sh: Should not report an error if there are no files on the command
 	  line.  This happens normally in certain configurations.
+	* drivers/usbhost: Sheref Younan reported an error in the error handling when
+	  connection to a USB device fails.  In certain fail cases, the logic would try
+	  to free the device class instance twice, the first was okay, but the second
+	  caused a crash.
+	* graphics/nxbe/nxbe_colormap.c: Fix error noted by Bassem Fahmy.  The function
+	  nxbe_colormap was change to nxbe_configure... apparently "search-and-replace"
+	  error. This error was not noticed before because most NX platforms do not use
+	  colormapping.
\ No newline at end of file
diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html
index 57b0ccfde..e6c5a824d 100644
--- a/nuttx/Documentation/NuttX.html
+++ b/nuttx/Documentation/NuttX.html
@@ -8,7 +8,7 @@
   <tr align="center" bgcolor="#e4e4e4">
     <td>
       <h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
-      <p>Last Updated: May 10, 2011</p>
+      <p>Last Updated: May 12, 2011</p>
     </td>
   </tr>
 </table>
@@ -2199,6 +2199,16 @@ nuttx-6.3 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
       build time
     * Makefile: Removed support for Pascal pcode interpreter.  Support for that
       interpreter has been moved to apps/interpreter/Makefile.
+    * tools/mkdep.sh: Should not report an error if there are no files on the command
+      line.  This happens normally in certain configurations.
+    * drivers/usbhost: Sheref Younan reported an error in the error handling when
+      connection to a USB device fails.  In certain fail cases, the logic would try
+      to free the device class instance twice, the first was okay, but the second
+      caused a crash.
+    * graphics/nxbe/nxbe_colormap.c: Fix error noted by Bassem Fahmy.  The function
+      nxbe_colormap was change to nxbe_configure... apparently "search-and-replace"
+      error. This error was not noticed before because most NX platforms do not use
+      colormapping.
 
 apps-6.3 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
@@ -2206,6 +2216,11 @@ apps-6.3 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
       on module now installs and builds under this directory.
     * apps/interpreter/ficl: Added logic to build Ficl (the "Forth Inspired
       Command Language").  See http://ficl.sourceforge.net/.
+    * apps/netutils/dhcpc, dhcpcd, and tftp.  If these directories are included
+      in the configuration but CONFIG_NET_UDP is disable (which is not very wise),
+      then a make error occurs because tools/mkdep.sh is called with no files.
+    * system/free: Move Uros' custom free command from vsn/free
+    * system/install: Add a new install command submitted by Uros Platise.
 
 pascal-3.0 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
diff --git a/nuttx/arch/rgmp/include/arch.h b/nuttx/arch/rgmp/include/arch.h
new file mode 100644
index 000000000..789c1d471
--- /dev/null
+++ b/nuttx/arch/rgmp/include/arch.h
@@ -0,0 +1,72 @@
+/****************************************************************************
+ * 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
+
+#ifndef __ASSEMBLY__
+
+#include <nuttx/sched.h>
+#include <rgmp/hpet.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);
+
+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
+
+#endif
diff --git a/nuttx/arch/rgmp/include/com.h b/nuttx/arch/rgmp/include/com.h
new file mode 100644
index 000000000..918e3bd3f
--- /dev/null
+++ b/nuttx/arch/rgmp/include/com.h
@@ -0,0 +1,59 @@
+/****************************************************************************
+ * 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
+
+void up_serialinit(void);
+
+#endif
diff --git a/nuttx/arch/rgmp/include/irq.h b/nuttx/arch/rgmp/include/irq.h
new file mode 100644
index 000000000..7f8a06dbb
--- /dev/null
+++ b/nuttx/arch/rgmp/include/irq.h
@@ -0,0 +1,72 @@
+/****************************************************************************
+ * 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/trap.h>
+#include <rgmp/spinlock.h>
+#include <arch/types.h>
+
+struct xcptcontext {
+    struct Trapframe *tf;
+    // for signal using
+    unsigned int save_eip;
+    unsigned int save_eflags;
+    void *sigdeliver;
+};
+
+extern int nest_irq;
+
+static inline irqstate_t irqsave(void)
+{
+    return pushcli();
+}
+
+static inline void irqrestore(irqstate_t flags)
+{
+    popcli(flags);
+}
+
+#endif
+#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/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/src/Makefile b/nuttx/arch/rgmp/src/Makefile
new file mode 100644
index 000000000..c95a7ed56
--- /dev/null
+++ b/nuttx/arch/rgmp/src/Makefile
@@ -0,0 +1,93 @@
+############################################################################
+# 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 $(TOPDIR)/Make.defs
+
+
+CFLAGS		+= -I$(TOPDIR)/sched -I$(TOPDIR)/fs
+
+ASRCS		= sigentry.S
+AOBJS		= $(ASRCS:.S=$(OBJEXT))
+CSRCS		= nuttx.c rgmp.c bridge.c com.c
+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 /usr/lib/gcc/$(shell gcc -dumpmachine)/$(shell gcc -dumpversion)/libgcc.a
+
+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
+
+.depend: Makefile $(SRCS)
+	@$(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+	@touch $@
+
+depend: .depend
+
+clean:
+	@rm -f libarch$(LIBEXT) *~ .*.swp
+	$(call CLEAN)
+
+distclean: clean
+	@rm -f Make.dep .depend
+
+-include Make.dep
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/com.c b/nuttx/arch/rgmp/src/com.c
new file mode 100644
index 000000000..206a2ddc9
--- /dev/null
+++ b/nuttx/arch/rgmp/src/com.c
@@ -0,0 +1,627 @@
+/****************************************************************************
+ * arch/rgmp/src/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/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 = kzmalloc(sizeof(struct up_dev_s));
+    if (priv == NULL)
+        goto err0;
+
+    dev = kzmalloc(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;
+    uint8_t ier;
+
+    ier = inb(base+COM_IER);
+    if (enable) {
+        ier |= COM_IER_TEI;
+
+        /* 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);
+}
+
+/****************************************************************************
+ * 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/nuttx.c b/nuttx/arch/rgmp/src/nuttx.c
new file mode 100644
index 000000000..ba5ffdd9b
--- /dev/null
+++ b/nuttx/arch/rgmp/src/nuttx.c
@@ -0,0 +1,526 @@
+/****************************************************************************
+ * 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 <rgmp/boot.h>
+#include <rgmp/pmap.h>
+#include <rgmp/x86.h>
+#include <rgmp/assert.h>
+#include <rgmp/spinlock.h>
+#include <rgmp/console.h>
+#include <rgmp/string.h>
+#include <rgmp/fpu.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 <arch/com.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;
+    asm volatile ("int $0x40"
+		  ::"a"(ctcb?&ctcb->xcp.tf:NULL),
+		    "b"(ntcb->xcp.tf));
+}
+
+void up_initialize(void)
+{
+    extern pidhash_t g_pidhash[];
+    extern void up_register_bridges(void);
+    extern void vnet_initialize(void);
+
+    // intialize the current_task to g_idletcb
+    current_task = g_pidhash[PIDHASH(0)].tcb;
+
+    // setup console
+    up_register_bridges();
+
+    // setup net device
+    vnet_initialize();
+
+    // setup COM device
+    up_serialinit();
+
+    // enable interrupt
+    sti();
+}
+
+void up_idle(void)
+{
+    asm volatile("hlt");
+}
+
+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 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   = adj_stack_ptr;
+	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   = adj_stack_ptr;
+    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;
+	    tcb->xcp.save_eip = tcb->xcp.tf->tf_eip;
+	    tcb->xcp.save_eflags = tcb->xcp.tf->tf_eflags;
+
+	    // Then set up to the trampoline with interrupts disabled
+	    tcb->xcp.tf->tf_eip = (uint32_t)up_sigentry;
+	    tcb->xcp.tf->tf_eflags = 0;
+        }
+
+	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;
+
+    tf->tf_eip = current_task->xcp.save_eip;
+    tf->tf_eflags = current_task->xcp.save_eflags;
+    sigdeliver = current_task->xcp.sigdeliver;
+    current_task->xcp.sigdeliver = NULL;
+    sti();
+    sigdeliver(current_task);
+    cli();
+}
+
+
+
+
+
+
+
diff --git a/nuttx/arch/rgmp/src/rgmp.c b/nuttx/arch/rgmp/src/rgmp.c
new file mode 100644
index 000000000..904729d51
--- /dev/null
+++ b/nuttx/arch/rgmp/src/rgmp.c
@@ -0,0 +1,157 @@
+/****************************************************************************
+ * 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/x86.h>
+#include <rgmp/trap.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(4096, 4096);
+}
+
+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)
+{
+    cli();
+    nest_irq--;
+    if (!nest_irq) {
+	_TCB *rtcb = current_task;
+	_TCB *ntcb;
+
+	if (rtcb->xcp.sigdeliver) {
+	    rtcb->xcp.save_eip = tf->tf_eip;
+	    rtcb->xcp.save_eflags = tf->tf_eflags;
+
+	    // Then set up to the trampoline with interrupts disabled
+	    tf->tf_eip = (uint32_t)up_sigentry;
+	    tf->tf_eflags = 0;
+	}
+	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);
+}
+
+
diff --git a/nuttx/arch/rgmp/src/sigentry.S b/nuttx/arch/rgmp/src/sigentry.S
new file mode 100644
index 000000000..b2f9d6283
--- /dev/null
+++ b/nuttx/arch/rgmp/src/sigentry.S
@@ -0,0 +1,55 @@
+/****************************************************************************
+ * arch/rgmp/src/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
diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt
index 82d83eaf2..cf4f61cff 100644
--- a/nuttx/configs/README.txt
+++ b/nuttx/configs/README.txt
@@ -1078,6 +1078,17 @@ configs/pjrc-8051
 	8051 Microcontroller.  This port uses the PJRC 87C52 development system
 	and the SDCC toolchain.   This port is not quite ready for prime time.
 
+configs/rgmp
+
+  RGMP stands for RTOS and GPOS on Multi-Processor.  RGMP is a project for 
+  running GPOS and RTOS simultaneously on multi-processor platforms. You can
+  port your favorite RTOS to RGMP together with an unmodified Linux to form a
+  hybrid operating system. This makes your application able to use both RTOS
+  and GPOS feathures.
+
+  See http://rgmp.sourceforge.net/wiki/index.php/Main_Page for further
+
+information about RGMP.
 configs/sim
 	A user-mode port of NuttX to the x86 Linux platform is available.
 	The purpose of this port is primarily to support OS feature development.
diff --git a/nuttx/configs/rgmp/README.txt b/nuttx/configs/rgmp/README.txt
new file mode 100755
index 000000000..34f39f732
--- /dev/null
+++ b/nuttx/configs/rgmp/README.txt
@@ -0,0 +1,11 @@
+RGMP README File

+================

+

+RGMP stands for RTOS and GPOS on Multi-Processor.  RGMP is a project for 

+running GPOS and RTOS simultaneously on multi-processor platforms. You can

+port your favorite RTOS to RGMP together with an unmodified Linux to form a

+hybrid operating system. This makes your application able to use both RTOS

+and GPOS feathures.

+

+See http://rgmp.sourceforge.net/wiki/index.php/Main_Page for further

+information about RGMP.
\ No newline at end of file
diff --git a/nuttx/configs/rgmp/default/Make.defs b/nuttx/configs/rgmp/default/Make.defs
new file mode 100644
index 000000000..1e104d76d
--- /dev/null
+++ b/nuttx/configs/rgmp/default/Make.defs
@@ -0,0 +1,119 @@
+############################################################################
+# configs/rgmp/default/Make.defs
+#
+#   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.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+
+RGMPLIBDIR := $(RGMP_INST_DIR)/lib
+RGMPINCDIR := $(RGMP_INST_DIR)/include
+RGMPLKSCPT := $(RGMP_INST_DIR)/etc/x86.ld
+
+HOSTOS			= ${shell uname -o}
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION	= -O2 -gstabs
+else
+  ARCHOPTIMIZATION	= -O2
+endif
+
+ARCHCPUFLAGS		= -fno-builtin -nostdinc -fno-stack-protector 
+ARCHPICFLAGS		= -fpic
+ARCHWARNINGS		= -Wall -Wstrict-prototypes -Wshadow
+ARCHDEFINES		=
+ARCHINCLUDES		= -I. -isystem $(TOPDIR)/include -I$(RGMPINCDIR) \
+			  -I$(TOPDIR)/configs/rgmp/include
+ARCHSCRIPT		=
+
+CROSSDEV		=
+CC			= $(CROSSDEV)gcc
+CPP			= $(CROSSDEV)gcc -E
+LD			= $(CROSSDEV)ld
+AR			= $(CROSSDEV)ar rcs
+NM			= $(CROSSDEV)nm
+OBJCOPY			= $(CROSSDEV)objcopy
+OBJDUMP			= $(CROSSDEV)objdump
+
+CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
+			  $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) -pipe
+CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
+AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
+
+OBJEXT			= .o
+LIBEXT			= .a
+
+ifeq ($(HOSTOS),Cygwin)
+  EXEEXT		= .exe
+else
+  EXEEXT		=
+endif
+
+ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+  LDFLAGS		+= -g
+endif
+LDFLAGS                 += -nostdlib
+EXTRA_LIBS		= 
+
+define PREPROCESS
+	@echo "CPP: $1->$2"
+	@$(CPP) $(CPPFLAGS) $1 -o $2
+endef
+
+define COMPILE
+	@echo "CC: $1"
+	@$(CC) -c $(CFLAGS) $1 -o $2
+endef
+
+define ASSEMBLE
+	@echo "AS: $1"
+	@$(CC) -c $(AFLAGS) $1 -o $2
+endef
+
+define ARCHIVE
+	echo "AR: $2"; \
+	$(AR) $1 $2 || { echo "$(AR) $1 $2 FAILED!" ; exit 1 ; }
+endef
+
+define CLEAN
+	@rm -f *.o *.a
+endef
+
+MKDEP			= $(TOPDIR)/tools/mkdeps.sh
+
+HOSTCC			= gcc
+HOSTINCLUDES		= -I.
+HOSTCFLAGS		= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
+			  $(ARCHCPUFLAGS) $(HOSTINCLUDES) $(ARCHDEFINES) -pipe
+HOSTLDFLAGS		=
diff --git a/nuttx/configs/rgmp/default/appconfig b/nuttx/configs/rgmp/default/appconfig
new file mode 100644
index 000000000..e1397db20
--- /dev/null
+++ b/nuttx/configs/rgmp/default/appconfig
@@ -0,0 +1,39 @@
+############################################################################
+# configs/sim/default/appconfig
+#
+#   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.
+#
+############################################################################
+
+# Path to example in apps/examples containing the user_start entry point
+
+CONFIGURED_APPS += examples/rgmp
+
diff --git a/nuttx/configs/rgmp/default/defconfig b/nuttx/configs/rgmp/default/defconfig
new file mode 100644
index 000000000..0f744c73d
--- /dev/null
+++ b/nuttx/configs/rgmp/default/defconfig
@@ -0,0 +1,393 @@
+############################################################################
+# configs/rgmp/default/defconfig
+#
+#   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.
+#
+############################################################################
+#
+# Architecture selection
+#
+# CONFIG_ARCH - identifies the arch subdirectory and, hence, the
+#   processor architecture.
+# CONFIG_ARCH_name - for use in C code.  This identifies the particular
+#   processor architecture (CONFIG_ARCH_SIM).
+# CONFIG_ARCH_BOARD - identifies the configs subdirectory and, hence,
+#   the board that supports the particular chip or SoC.
+# CONFIG_ARCH_BOARD_name - for use in C code
+# CONFIG_ENDIAN_BIG - define if big endian (default is little endian)
+#
+CONFIG_ARCH=rgmp
+CONFIG_ARCH_RGMP=y
+CONFIG_ARCH_BOARD=rgmp
+CONFIG_ARCH_BOARD_RGMP=y
+
+#
+# General OS setup
+#
+# CONFIG_APPS_DIR - Identifies the relative path to the directory
+#   that builds the application to link with NuttX.  Default: ../apps
+# CONFIG_DEBUG - enables built-in debug options
+# CONFIG_DEBUG_VERBOSE - enables verbose debug output
+# CONFIG_DEBUG_SYMBOLS - build without optimization and with
+#   debug symbols (needed for use with a debugger).
+# CONFIG_MM_REGIONS - If the architecture includes multiple
+#   regions of memory to allocate from, this specifies the
+#   number of memory regions that the memory manager must
+#   handle and enables the API mm_addregion(start, end);
+# CONFIG_ARCH_LOWPUTC - architecture supports low-level, boot
+#   time console output
+# CONFIG_MSEC_PER_TICK - The default system timer is 100Hz
+#   or MSEC_PER_TICK=10.  This setting may be defined to
+#   inform NuttX that the processor hardware is providing
+#   system timer interrupts at some interrupt interval other
+#   than 10 msec.
+# CONFIG_RR_INTERVAL - The round robin timeslice will be set
+#   this number of milliseconds;  Round robin scheduling can
+#   be disabled by setting this value to zero.
+# CONFIG_SCHED_INSTRUMENTATION - enables instrumentation in 
+#   scheduler to monitor system performance
+# CONFIG_TASK_NAME_SIZE - Spcifies that maximum size of a
+#   task name to save in the TCB.  Useful if scheduler
+#   instrumentation is selected.  Set to zero to disable.
+# CONFIG_JULIAN_TIME - Enables Julian time conversions
+# CONFIG_START_YEAR, CONFIG_START_MONTH, CONFIG_START_DAY -
+#   Used to initialize the internal time logic.
+# CONFIG_DEV_CONSOLE - Set if architecture-specific logic
+#   provides /dev/console.  Enables stdout, stderr, stdin.
+# CONFIG_DEV_LOWCONSOLE - Use the simple, low-level serial console
+#   driver (minimul support)
+# CONFIG_MUTEX_TYPES: Set to enable support for recursive and
+#   errorcheck mutexes. Enables pthread_mutexattr_settype().
+# CONFIG_PRIORITY_INHERITANCE : Set to enable support for priority
+#   inheritance on mutexes and semaphores. 
+# CONFIG_SEM_PREALLOCHOLDERS: This setting is only used if priority
+#   inheritance is enabled.  It defines the maximum number of
+#   different threads (minus one) that can take counts on a
+#   semaphore with priority inheritance support.  This may be 
+#   set to zero if priority inheritance is disabled OR if you
+#   are only using semaphores as mutexes (only one holder) OR
+#   if no more than two threads participate using a counting
+#   semaphore.
+# CONFIG_SEM_NNESTPRIO.  If priority inheritance is enabled,
+#   then this setting is the maximum number of higher priority
+#   threads (minus 1) than can be waiting for another thread
+#   to release a count on a semaphore.  This value may be set
+#   to zero if no more than one thread is expected to wait for
+#   a semaphore.
+# CONFIG_FDCLONE_DISABLE. Disable cloning of all file descriptors
+#   by task_create() when a new task is started.  If set, all
+#   files/drivers will appear to be closed in the new task.
+# CONFIG_FDCLONE_STDIO. Disable cloning of all but the first
+#   three file descriptors (stdin, stdout, stderr) by task_create()
+#   when a new task is started. If set, all files/drivers will
+#   appear to be closed in the new task except for stdin, stdout,
+#   and stderr.
+# CONFIG_SDCLONE_DISABLE. Disable cloning of all socket
+#   desciptors by task_create() when a new task is started. If
+#   set, all sockets will appear to be closed in the new task.
+#
+#CONFIG_APPS_DIR=
+CONFIG_DEBUG=n
+CONFIG_DEBUG_VERBOSE=n
+CONFIG_DEBUG_SYMBOLS=n
+CONFIG_MM_REGIONS=1
+CONFIG_ARCH_LOWPUTC=y
+CONFIG_MSEC_PER_TICK=1
+CONFIG_RR_INTERVAL=0
+CONFIG_SCHED_INSTRUMENTATION=n
+CONFIG_TASK_NAME_SIZE=32
+CONFIG_START_YEAR=2007
+CONFIG_START_MONTH=2
+CONFIG_START_DAY=27
+CONFIG_JULIAN_TIME=n
+CONFIG_DEV_CONSOLE=y
+CONFIG_DEV_LOWCONSOLE=n
+CONFIG_MUTEX_TYPES=n
+CONFIG_PRIORITY_INHERITANCE=n
+CONFIG_SEM_PREALLOCHOLDERS=0
+CONFIG_SEM_NNESTPRIO=0
+CONFIG_FDCLONE_DISABLE=n
+CONFIG_FDCLONE_STDIO=n
+CONFIG_SDCLONE_DISABLE=y
+
+#
+# The following can be used to disable categories of
+# APIs supported by the OS.  If the compiler supports
+# weak functions, then it should not be necessary to
+# disable functions unless you want to restrict usage
+# of those APIs.
+#
+# There are certain dependency relationships in these
+# features.
+#
+# o mq_notify logic depends on signals to awaken tasks
+#   waiting for queues to become full or empty.
+# o pthread_condtimedwait() depends on signals to wake
+#   up waiting tasks.
+#
+CONFIG_DISABLE_CLOCK=n
+CONFIG_DISABLE_POSIX_TIMERS=n
+CONFIG_DISABLE_PTHREAD=n
+CONFIG_DISABLE_SIGNALS=n
+CONFIG_DISABLE_MQUEUE=n
+CONFIG_DISABLE_MOUNTPOINT=n
+CONFIG_DISABLE_ENVIRON=n
+CONFIG_DISABLE_POLL=y
+
+#
+# Misc libc settings
+#
+# CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a
+#   little smaller if we do not support fieldwidthes
+#
+CONFIG_NOPRINTF_FIELDWIDTH=n
+
+#
+# Allow for architecture optimized implementations
+#
+# The architecture can provide optimized versions of the
+# following to improve sysem performance
+#
+CONFIG_ARCH_MEMCPY=y
+CONFIG_ARCH_MEMCMP=y
+CONFIG_ARCH_MEMMOVE=y
+CONFIG_ARCH_MEMSET=y
+CONFIG_ARCH_STRCMP=y
+CONFIG_ARCH_STRCPY=y
+CONFIG_ARCH_STRNCPY=y
+CONFIG_ARCH_STRLEN=y
+CONFIG_ARCH_STRNLEN=y
+CONFIG_ARCH_BZERO=n
+
+#
+# General build options
+#
+# CONFIG_RRLOAD_BINARY - make the rrload binary format used with
+#   BSPs from www.ridgerun.com using the tools/mkimage.sh script
+# CONFIG_INTELHEX_BINARY - make the Intel HEX binary format
+#   used with many different loaders using the GNU objcopy program
+#   Should not be selected if you are not using the GNU toolchain.
+# CONFIG_RAW_BINARY - make a raw binary format file used with many
+#   different loaders using the GNU objcopy program.  This option
+#   should not be selected if you are not using the GNU toolchain.
+# CONFIG_HAVE_LIBM - toolchain supports libm.a
+#
+CONFIG_RRLOAD_BINARY=n
+CONFIG_INTELHEX_BINARY=n
+CONFIG_RAW_BINARY=n
+CONFIG_HAVE_LIBM=n
+
+#
+# Sizes of configurable things (0 disables)
+#
+# CONFIG_MAX_TASKS - The maximum number of simultaneously
+#   active tasks. This value must be a power of two.
+# CONFIG_MAX_TASK_ARGS - This controls the maximum number of
+#   of parameters that a task may receive (i.e., maxmum value
+#   of 'argc')
+# CONFIG_NPTHREAD_KEYS - The number of items of thread-
+#   specific data that can be retained
+# CONFIG_NFILE_DESCRIPTORS - The maximum number of file
+#   descriptors (one for each open)
+# CONFIG_NFILE_STREAMS - The maximum number of streams that
+#   can be fopen'ed
+# CONFIG_NAME_MAX - The maximum size of a file name.
+# CONFIG_STDIO_BUFFER_SIZE - Size of the buffer to allocate
+#   on fopen. (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_NUNGET_CHARS - Number of characters that can be
+#   buffered by ungetc() (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_PREALLOC_MQ_MSGS - The number of pre-allocated message
+#   structures.  The system manages a pool of preallocated
+#   message structures to minimize dynamic allocations
+# CONFIG_MQ_MAXMSGSIZE - Message structures are allocated with
+#   a fixed payload size given by this settin (does not include
+#   other message structure overhead.
+# CONFIG_MAX_WDOGPARMS - Maximum number of parameters that
+#   can be passed to a watchdog handler
+# CONFIG_PREALLOC_WDOGS - The number of pre-allocated watchdog
+#   structures.  The system manages a pool of preallocated
+#   watchdog structures to minimize dynamic allocations
+# CONFIG_PREALLOC_TIMERS - The number of pre-allocated POSIX
+#   timer structures.  The system manages a pool of preallocated
+#   timer structures to minimize dynamic allocations.  Set to
+#   zero for all dynamic allocations.
+#
+CONFIG_MAX_TASKS=64
+CONFIG_MAX_TASK_ARGS=4
+CONFIG_NPTHREAD_KEYS=4
+CONFIG_NFILE_DESCRIPTORS=32
+CONFIG_NFILE_STREAMS=16
+CONFIG_NAME_MAX=32
+CONFIG_STDIO_BUFFER_SIZE=1024
+CONFIG_NUNGET_CHARS=2
+CONFIG_PREALLOC_MQ_MSGS=32
+CONFIG_MQ_MAXMSGSIZE=32
+CONFIG_MAX_WDOGPARMS=4
+CONFIG_PREALLOC_WDOGS=32
+CONFIG_PREALLOC_TIMERS=8
+
+#
+# FAT filesystem configuration
+# CONFIG_FS_FAT - Enable FAT filesystem support
+# CONFIG_FAT_SECTORSIZE - Max supported sector size
+# CONFIG_FS_ROMFS - Enable ROMFS filesystem support
+CONFIG_FS_FAT=n
+CONFIG_FS_ROMFS=n
+
+#
+# TCP/IP and UDP support via uIP
+# CONFIG_NET - Enable or disable all network features
+# CONFIG_NET_IPv6 - Build in support for IPv6
+# CONFIG_NSOCKET_DESCRIPTORS - Maximum number of socket descriptors per task/thread.
+# CONFIG_NET_SOCKOPTS - Enable or disable support for socket options
+# CONFIG_NET_BUFSIZE - uIP buffer size
+# CONFIG_NET_TCP - TCP support on or off
+# CONFIG_NET_TCP_CONNS - Maximum number of TCP connections (all tasks)
+# CONFIG_NET_TCP_READAHEAD_BUFSIZE - Size of TCP read-ahead buffers
+# CONFIG_NET_NTCP_READAHEAD_BUFFERS - Number of TCP read-ahead buffers (may be zero)
+# CONFIG_NET_TCPBACKLOG - Incoming connections pend in a backlog until
+#   accept() is called. The size of the backlog is selected when listen() is called.
+# CONFIG_NET_MAX_LISTENPORTS - Maximum number of listening TCP ports (all tasks)
+# CONFIG_NET_UDP - UDP support on or off
+# CONFIG_NET_UDP_CHECKSUMS - UDP checksums on or off
+# CONFIG_NET_UDP_CONNS - The maximum amount of concurrent UDP connections
+# CONFIG_NET_ICMP - ICMP ping response support on or off
+# CONFIG_NET_ICMP_PING - ICMP ping request support on or off
+# CONFIG_NET_PINGADDRCONF - Use "ping" packet for setting IP address
+# CONFIG_NET_STATISTICS - uIP statistics on or off
+# CONFIG_NET_RECEIVE_WINDOW - The size of the advertised receiver's window
+# CONFIG_NET_ARPTAB_SIZE - The size of the ARP table
+# CONFIG_NET_BROADCAST - Broadcast support
+# CONFIG_NET_LLH_LEN - The link level header length
+# CONFIG_NET_FWCACHE_SIZE - number of packets to remember when looking for duplicates
+CONFIG_NET=y
+CONFIG_NET_IPv6=n
+CONFIG_NSOCKET_DESCRIPTORS=5
+CONFIG_NET_SOCKOPTS=y
+CONFIG_NET_BUFSIZE=1514
+CONFIG_NET_TCP=y
+CONFIG_NET_TCP_CONNS=40
+CONFIG_NET_MAX_LISTENPORTS=40
+CONFIG_NET_UDP=y
+CONFIG_NET_UDP_CHECKSUMS=y
+#CONFIG_NET_UDP_CONNS=10
+CONFIG_NET_ICMP=y
+CONFIG_NET_ICMP_PING=y
+#CONFIG_NET_PINGADDRCONF=0
+CONFIG_NET_STATISTICS=y
+#CONFIG_NET_RECEIVE_WINDOW=128
+#CONFIG_NET_ARPTAB_SIZE=8
+CONFIG_NET_BROADCAST=n
+#CONFIG_NET_LLH_LEN=14
+#CONFIG_NET_FWCACHE_SIZE=2
+
+#
+# UIP Network Utilities
+# CONFIG_NET_DHCP_LIGHT - Reduces size of DHCP
+# CONFIG_NET_RESOLV_ENTRIES - Number of resolver entries
+CONFIG_NET_DHCP_LIGHT=n
+CONFIG_NET_RESOLV_ENTRIES=4
+
+#
+# Settings for examples/uip
+CONFIG_EXAMPLE_UIP_IPADDR=(192<<24|168<<16|10<<8|2)
+CONFIG_EXAMPLE_UIP_DRIPADDR=(192<<24|168<<16|10<<8|1)
+CONFIG_EXAMPLE_UIP_NETMASK=(255<<24|255<<16|255<<8|0)
+CONFIG_EXAMPLE_UIP_DHCPC=n
+
+#
+# Settings for examples/nettest
+CONFIG_EXAMPLE_NETTEST_SERVER=n
+CONFIG_EXAMPLE_NETTEST_PERFORMANCE=n
+CONFIG_EXAMPLE_NETTEST_NOMAC=n
+CONFIG_EXAMPLE_NETTEST_IPADDR=(192<<24|168<<16|0<<8|128)
+CONFIG_EXAMPLE_NETTEST_DRIPADDR=(192<<24|168<<16|0<<8|1)
+CONFIG_EXAMPLE_NETTEST_NETMASK=(255<<24|255<<16|255<<8|0)
+CONFIG_EXAMPLE_NETTEST_CLIENTIP=(192<<24|168<<16|0<<8|106)
+
+#
+# Settings for examples/nsh
+CONFIG_EXAMPLES_NSH_CONSOLE=y
+CONFIG_EXAMPLES_NSH_TELNET=n
+CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE=512
+CONFIG_EXAMPLES_NSH_CMD_SIZE=40
+CONFIG_EXAMPLES_NSH_STACKSIZE=4096
+CONFIG_EXAMPLES_NSH_DHCPC=n
+CONFIG_EXAMPLES_NSH_NOMAC=n
+CONFIG_EXAMPLES_NSH_IPADDR=(10<<24|0<<16|0<<8|2)
+CONFIG_EXAMPLES_NSH_DRIPADDR=(10<<24|0<<16|0<<8|1)
+CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
+
+#
+# Stack and heap information
+#
+# CONFIG_BOOT_RUNFROMFLASH - Some configurations support XIP
+#   operation from FLASH but must copy initialized .data sections to RAM.
+# CONFIG_BOOT_COPYTORAM -  Some configurations boot in FLASH
+#   but copy themselves entirely into RAM for better performance.
+# CONFIG_CUSTOM_STACK - The up_ implementation will handle
+#   all stack operations outside of the nuttx model.
+# CONFIG_STACK_POINTER - The initial stack pointer
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2 after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
+# CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
+# CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
+# CONFIG_HEAP_BASE - The beginning of the heap
+# CONFIG_HEAP_SIZE - The size of the heap
+#
+CONFIG_BOOT_RUNFROMFLASH=n
+CONFIG_BOOT_COPYTORAM=n
+CONFIG_CUSTOM_STACK=n
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=8192
+CONFIG_HEAP_BASE=
+CONFIG_HEAP_SIZE=
+
+
+#
+# RGMP specific configuration
+#
+CONFIG_NET_VNET=y
+CONFIG_VNET_NINTERFACES=1
+CONFIG_COM1=y
+CONFIG_COM2=y
+CONFIG_COM3=n
+CONFIG_COM4=n
+CONFIG_E1000=n
diff --git a/nuttx/configs/rgmp/default/setenv.sh b/nuttx/configs/rgmp/default/setenv.sh
new file mode 100755
index 000000000..a6a533e47
--- /dev/null
+++ b/nuttx/configs/rgmp/default/setenv.sh
@@ -0,0 +1,47 @@
+#!/bin/bash
+# config/rgmp/default/setenv.sh
+#
+#   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.
+#
+
+if [ "$(basename $0)" = "setenv.sh" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+if [ -z ${PATH_ORIG} ]; then export PATH_ORIG=${PATH}; fi
+
+#export NUTTX_BIN=
+#export PATH=${NUTTX_BIN}:/sbin:/usr/sbin:${PATH_ORIG}
+
+echo "PATH : ${PATH}"
diff --git a/nuttx/configs/rgmp/include/README.txt b/nuttx/configs/rgmp/include/README.txt
new file mode 100755
index 000000000..006f13e7c
--- /dev/null
+++ b/nuttx/configs/rgmp/include/README.txt
@@ -0,0 +1 @@
+This directory is reserved for RGMP header files

diff --git a/nuttx/configs/rgmp/include/stdarg.h b/nuttx/configs/rgmp/include/stdarg.h
new file mode 100755
index 000000000..8f879a819
--- /dev/null
+++ b/nuttx/configs/rgmp/include/stdarg.h
@@ -0,0 +1,23 @@
+#ifndef _RGMP_STDARG_H
+#define	_RGMP_STDARG_H
+
+typedef char *va_list;
+
+#define	__va_size(type) \
+	(((sizeof(type) + sizeof(long) - 1) / sizeof(long)) * sizeof(long))
+
+#ifndef va_start
+#define	va_start(ap, last) \
+	((ap) = (va_list)&(last) + __va_size(last))
+#endif
+
+#ifndef va_arg
+#define	va_arg(ap, type) \
+	(*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
+#endif
+
+#ifndef va_end
+#define	va_end(ap)	((void)0)
+#endif
+
+#endif
diff --git a/nuttx/configs/rgmp/nsh/Make.defs b/nuttx/configs/rgmp/nsh/Make.defs
new file mode 100644
index 000000000..41073c249
--- /dev/null
+++ b/nuttx/configs/rgmp/nsh/Make.defs
@@ -0,0 +1,119 @@
+############################################################################
+# configs/rgmp/nsh/Make.defs
+#
+#   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.
+#
+############################################################################
+
+include ${TOPDIR}/.config
+
+RGMPLIBDIR := $(RGMP_INST_DIR)/lib
+RGMPINCDIR := $(RGMP_INST_DIR)/include
+RGMPLKSCPT := $(RGMP_INST_DIR)/etc/x86.ld
+
+HOSTOS			= ${shell uname -o}
+
+ifeq ($(CONFIG_DEBUG_SYMBOLS),y)
+  ARCHOPTIMIZATION	= -O2 -gstabs
+else
+  ARCHOPTIMIZATION	= -O2
+endif
+
+ARCHCPUFLAGS		= -fno-builtin -nostdinc -fno-stack-protector 
+ARCHPICFLAGS		= -fpic
+ARCHWARNINGS		= -Wall -Wstrict-prototypes -Wshadow
+ARCHDEFINES		=
+ARCHINCLUDES		= -I. -isystem $(TOPDIR)/include -I$(RGMPINCDIR) \
+			  -I$(TOPDIR)/configs/rgmp/include
+ARCHSCRIPT		=
+
+CROSSDEV		=
+CC			= $(CROSSDEV)gcc
+CPP			= $(CROSSDEV)gcc -E
+LD			= $(CROSSDEV)ld
+AR			= $(CROSSDEV)ar rcs
+NM			= $(CROSSDEV)nm
+OBJCOPY			= $(CROSSDEV)objcopy
+OBJDUMP			= $(CROSSDEV)objdump
+
+CFLAGS			= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
+			  $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) -pipe
+CPPFLAGS		= $(ARCHINCLUDES) $(ARCHDEFINES)
+AFLAGS			= $(CFLAGS) -D__ASSEMBLY__
+
+OBJEXT			= .o
+LIBEXT			= .a
+
+ifeq ($(HOSTOS),Cygwin)
+  EXEEXT		= .exe
+else
+  EXEEXT		=
+endif
+
+ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
+  LDFLAGS		+= -g
+endif
+LDFLAGS                 += -nostdlib
+EXTRA_LIBS		= 
+
+define PREPROCESS
+	@echo "CPP: $1->$2"
+	@$(CPP) $(CPPFLAGS) $1 -o $2
+endef
+
+define COMPILE
+	@echo "CC: $1"
+	@$(CC) -c $(CFLAGS) $1 -o $2
+endef
+
+define ASSEMBLE
+	@echo "AS: $1"
+	@$(CC) -c $(AFLAGS) $1 -o $2
+endef
+
+define ARCHIVE
+	echo "AR: $2"; \
+	$(AR) $1 $2 || { echo "$(AR) $1 $2 FAILED!" ; exit 1 ; }
+endef
+
+define CLEAN
+	@rm -f *.o *.a
+endef
+
+MKDEP			= $(TOPDIR)/tools/mkdeps.sh
+
+HOSTCC			= gcc
+HOSTINCLUDES		= -I.
+HOSTCFLAGS		= $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
+			  $(ARCHCPUFLAGS) $(HOSTINCLUDES) $(ARCHDEFINES) -pipe
+HOSTLDFLAGS		=
diff --git a/nuttx/configs/rgmp/nsh/appconfig b/nuttx/configs/rgmp/nsh/appconfig
new file mode 100644
index 000000000..a8a574f8c
--- /dev/null
+++ b/nuttx/configs/rgmp/nsh/appconfig
@@ -0,0 +1,43 @@
+############################################################################
+# configs/rgmp/nsh/appconfig
+#
+#   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.
+#
+############################################################################
+
+# Path to example in apps/examples containing the user_start entry point
+
+CONFIGURED_APPS += examples/nsh
+
+# The NSH Library
+
+CONFIGURED_APPS += nshlib
+
diff --git a/nuttx/configs/rgmp/nsh/defconfig b/nuttx/configs/rgmp/nsh/defconfig
new file mode 100644
index 000000000..68d361a09
--- /dev/null
+++ b/nuttx/configs/rgmp/nsh/defconfig
@@ -0,0 +1,394 @@
+############################################################################
+# configs/rgmp/nsh/defconfig
+#
+#   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.
+#
+############################################################################
+#
+# Architecture selection
+#
+# CONFIG_ARCH - identifies the arch subdirectory and, hence, the
+#   processor architecture.
+# CONFIG_ARCH_name - for use in C code.  This identifies the particular
+#   processor architecture (CONFIG_ARCH_SIM).
+# CONFIG_ARCH_BOARD - identifies the configs subdirectory and, hence,
+#   the board that supports the particular chip or SoC.
+# CONFIG_ARCH_BOARD_name - for use in C code
+# CONFIG_ENDIAN_BIG - define if big endian (default is little endian)
+#
+CONFIG_ARCH=rgmp
+CONFIG_ARCH_RGMP=y
+CONFIG_ARCH_BOARD=rgmp
+CONFIG_ARCH_BOARD_RGMP=y
+
+#
+# General OS setup
+#
+# CONFIG_APPS_DIR - Identifies the relative path to the directory
+#   that builds the application to link with NuttX.  Default: ../apps
+# CONFIG_DEBUG - enables built-in debug options
+# CONFIG_DEBUG_VERBOSE - enables verbose debug output
+# CONFIG_DEBUG_SYMBOLS - build without optimization and with
+#   debug symbols (needed for use with a debugger).
+# CONFIG_MM_REGIONS - If the architecture includes multiple
+#   regions of memory to allocate from, this specifies the
+#   number of memory regions that the memory manager must
+#   handle and enables the API mm_addregion(start, end);
+# CONFIG_ARCH_LOWPUTC - architecture supports low-level, boot
+#   time console output
+# CONFIG_MSEC_PER_TICK - The default system timer is 100Hz
+#   or MSEC_PER_TICK=10.  This setting may be defined to
+#   inform NuttX that the processor hardware is providing
+#   system timer interrupts at some interrupt interval other
+#   than 10 msec.
+# CONFIG_RR_INTERVAL - The round robin timeslice will be set
+#   this number of milliseconds;  Round robin scheduling can
+#   be disabled by setting this value to zero.
+# CONFIG_SCHED_INSTRUMENTATION - enables instrumentation in 
+#   scheduler to monitor system performance
+# CONFIG_TASK_NAME_SIZE - Spcifies that maximum size of a
+#   task name to save in the TCB.  Useful if scheduler
+#   instrumentation is selected.  Set to zero to disable.
+# CONFIG_JULIAN_TIME - Enables Julian time conversions
+# CONFIG_START_YEAR, CONFIG_START_MONTH, CONFIG_START_DAY -
+#   Used to initialize the internal time logic.
+# CONFIG_DEV_CONSOLE - Set if architecture-specific logic
+#   provides /dev/console.  Enables stdout, stderr, stdin.
+# CONFIG_DEV_LOWCONSOLE - Use the simple, low-level serial console
+#   driver (minimul support)
+# CONFIG_MUTEX_TYPES: Set to enable support for recursive and
+#   errorcheck mutexes. Enables pthread_mutexattr_settype().
+# CONFIG_PRIORITY_INHERITANCE : Set to enable support for priority
+#   inheritance on mutexes and semaphores. 
+# CONFIG_SEM_PREALLOCHOLDERS: This setting is only used if priority
+#   inheritance is enabled.  It defines the maximum number of
+#   different threads (minus one) that can take counts on a
+#   semaphore with priority inheritance support.  This may be 
+#   set to zero if priority inheritance is disabled OR if you
+#   are only using semaphores as mutexes (only one holder) OR
+#   if no more than two threads participate using a counting
+#   semaphore.
+# CONFIG_SEM_NNESTPRIO.  If priority inheritance is enabled,
+#   then this setting is the maximum number of higher priority
+#   threads (minus 1) than can be waiting for another thread
+#   to release a count on a semaphore.  This value may be set
+#   to zero if no more than one thread is expected to wait for
+#   a semaphore.
+# CONFIG_FDCLONE_DISABLE. Disable cloning of all file descriptors
+#   by task_create() when a new task is started.  If set, all
+#   files/drivers will appear to be closed in the new task.
+# CONFIG_FDCLONE_STDIO. Disable cloning of all but the first
+#   three file descriptors (stdin, stdout, stderr) by task_create()
+#   when a new task is started. If set, all files/drivers will
+#   appear to be closed in the new task except for stdin, stdout,
+#   and stderr.
+# CONFIG_SDCLONE_DISABLE. Disable cloning of all socket
+#   desciptors by task_create() when a new task is started. If
+#   set, all sockets will appear to be closed in the new task.
+#
+#CONFIG_APPS_DIR=
+CONFIG_DEBUG=y
+CONFIG_DEBUG_VERBOSE=n
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_MM_REGIONS=1
+CONFIG_ARCH_LOWPUTC=y
+CONFIG_MSEC_PER_TICK=1
+CONFIG_RR_INTERVAL=0
+CONFIG_SCHED_INSTRUMENTATION=n
+CONFIG_TASK_NAME_SIZE=32
+CONFIG_START_YEAR=2007
+CONFIG_START_MONTH=2
+CONFIG_START_DAY=27
+CONFIG_JULIAN_TIME=n
+CONFIG_DEV_CONSOLE=y
+CONFIG_DEV_LOWCONSOLE=n
+CONFIG_MUTEX_TYPES=n
+CONFIG_PRIORITY_INHERITANCE=n
+CONFIG_SEM_PREALLOCHOLDERS=0
+CONFIG_SEM_NNESTPRIO=0
+CONFIG_FDCLONE_DISABLE=n
+CONFIG_FDCLONE_STDIO=n
+CONFIG_SDCLONE_DISABLE=y
+
+#
+# The following can be used to disable categories of
+# APIs supported by the OS.  If the compiler supports
+# weak functions, then it should not be necessary to
+# disable functions unless you want to restrict usage
+# of those APIs.
+#
+# There are certain dependency relationships in these
+# features.
+#
+# o mq_notify logic depends on signals to awaken tasks
+#   waiting for queues to become full or empty.
+# o pthread_condtimedwait() depends on signals to wake
+#   up waiting tasks.
+#
+CONFIG_DISABLE_CLOCK=n
+CONFIG_DISABLE_POSIX_TIMERS=n
+CONFIG_DISABLE_PTHREAD=n
+CONFIG_DISABLE_SIGNALS=n
+CONFIG_DISABLE_MQUEUE=n
+CONFIG_DISABLE_MOUNTPOINT=n
+CONFIG_DISABLE_ENVIRON=n
+CONFIG_DISABLE_POLL=y
+
+#
+# Misc libc settings
+#
+# CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a
+#   little smaller if we do not support fieldwidthes
+#
+CONFIG_NOPRINTF_FIELDWIDTH=n
+
+#
+# Allow for architecture optimized implementations
+#
+# The architecture can provide optimized versions of the
+# following to improve sysem performance
+#
+CONFIG_ARCH_MEMCPY=y
+CONFIG_ARCH_MEMCMP=y
+CONFIG_ARCH_MEMMOVE=y
+CONFIG_ARCH_MEMSET=y
+CONFIG_ARCH_STRCMP=y
+CONFIG_ARCH_STRCPY=y
+CONFIG_ARCH_STRNCPY=y
+CONFIG_ARCH_STRLEN=y
+CONFIG_ARCH_STRNLEN=y
+CONFIG_ARCH_BZERO=n
+
+#
+# General build options
+#
+# CONFIG_RRLOAD_BINARY - make the rrload binary format used with
+#   BSPs from www.ridgerun.com using the tools/mkimage.sh script
+# CONFIG_INTELHEX_BINARY - make the Intel HEX binary format
+#   used with many different loaders using the GNU objcopy program
+#   Should not be selected if you are not using the GNU toolchain.
+# CONFIG_RAW_BINARY - make a raw binary format file used with many
+#   different loaders using the GNU objcopy program.  This option
+#   should not be selected if you are not using the GNU toolchain.
+# CONFIG_HAVE_LIBM - toolchain supports libm.a
+#
+CONFIG_RRLOAD_BINARY=n
+CONFIG_INTELHEX_BINARY=n
+CONFIG_RAW_BINARY=n
+CONFIG_HAVE_LIBM=n
+
+#
+# Sizes of configurable things (0 disables)
+#
+# CONFIG_MAX_TASKS - The maximum number of simultaneously
+#   active tasks. This value must be a power of two.
+# CONFIG_MAX_TASK_ARGS - This controls the maximum number of
+#   of parameters that a task may receive (i.e., maxmum value
+#   of 'argc')
+# CONFIG_NPTHREAD_KEYS - The number of items of thread-
+#   specific data that can be retained
+# CONFIG_NFILE_DESCRIPTORS - The maximum number of file
+#   descriptors (one for each open)
+# CONFIG_NFILE_STREAMS - The maximum number of streams that
+#   can be fopen'ed
+# CONFIG_NAME_MAX - The maximum size of a file name.
+# CONFIG_STDIO_BUFFER_SIZE - Size of the buffer to allocate
+#   on fopen. (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_NUNGET_CHARS - Number of characters that can be
+#   buffered by ungetc() (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_PREALLOC_MQ_MSGS - The number of pre-allocated message
+#   structures.  The system manages a pool of preallocated
+#   message structures to minimize dynamic allocations
+# CONFIG_MQ_MAXMSGSIZE - Message structures are allocated with
+#   a fixed payload size given by this settin (does not include
+#   other message structure overhead.
+# CONFIG_MAX_WDOGPARMS - Maximum number of parameters that
+#   can be passed to a watchdog handler
+# CONFIG_PREALLOC_WDOGS - The number of pre-allocated watchdog
+#   structures.  The system manages a pool of preallocated
+#   watchdog structures to minimize dynamic allocations
+# CONFIG_PREALLOC_TIMERS - The number of pre-allocated POSIX
+#   timer structures.  The system manages a pool of preallocated
+#   timer structures to minimize dynamic allocations.  Set to
+#   zero for all dynamic allocations.
+#
+CONFIG_MAX_TASKS=64
+CONFIG_MAX_TASK_ARGS=4
+CONFIG_NPTHREAD_KEYS=4
+CONFIG_NFILE_DESCRIPTORS=32
+CONFIG_NFILE_STREAMS=16
+CONFIG_NAME_MAX=32
+CONFIG_STDIO_BUFFER_SIZE=1024
+CONFIG_NUNGET_CHARS=2
+CONFIG_PREALLOC_MQ_MSGS=32
+CONFIG_MQ_MAXMSGSIZE=32
+CONFIG_MAX_WDOGPARMS=4
+CONFIG_PREALLOC_WDOGS=32
+CONFIG_PREALLOC_TIMERS=8
+
+#
+# FAT filesystem configuration
+# CONFIG_FS_FAT - Enable FAT filesystem support
+# CONFIG_FAT_SECTORSIZE - Max supported sector size
+# CONFIG_FS_ROMFS - Enable ROMFS filesystem support
+CONFIG_FS_FAT=n
+CONFIG_FS_ROMFS=n
+
+#
+# TCP/IP and UDP support via uIP
+# CONFIG_NET - Enable or disable all network features
+# CONFIG_NET_IPv6 - Build in support for IPv6
+# CONFIG_NSOCKET_DESCRIPTORS - Maximum number of socket descriptors per task/thread.
+# CONFIG_NET_SOCKOPTS - Enable or disable support for socket options
+# CONFIG_NET_BUFSIZE - uIP buffer size
+# CONFIG_NET_TCP - TCP support on or off
+# CONFIG_NET_TCP_CONNS - Maximum number of TCP connections (all tasks)
+# CONFIG_NET_TCP_READAHEAD_BUFSIZE - Size of TCP read-ahead buffers
+# CONFIG_NET_NTCP_READAHEAD_BUFFERS - Number of TCP read-ahead buffers (may be zero)
+# CONFIG_NET_TCPBACKLOG - Incoming connections pend in a backlog until
+#   accept() is called. The size of the backlog is selected when listen() is called.
+# CONFIG_NET_MAX_LISTENPORTS - Maximum number of listening TCP ports (all tasks)
+# CONFIG_NET_UDP - UDP support on or off
+# CONFIG_NET_UDP_CHECKSUMS - UDP checksums on or off
+# CONFIG_NET_UDP_CONNS - The maximum amount of concurrent UDP connections
+# CONFIG_NET_ICMP - ICMP ping response support on or off
+# CONFIG_NET_ICMP_PING - ICMP ping request support on or off
+# CONFIG_NET_PINGADDRCONF - Use "ping" packet for setting IP address
+# CONFIG_NET_STATISTICS - uIP statistics on or off
+# CONFIG_NET_RECEIVE_WINDOW - The size of the advertised receiver's window
+# CONFIG_NET_ARPTAB_SIZE - The size of the ARP table
+# CONFIG_NET_BROADCAST - Broadcast support
+# CONFIG_NET_LLH_LEN - The link level header length
+# CONFIG_NET_FWCACHE_SIZE - number of packets to remember when looking for duplicates
+CONFIG_NET=y
+CONFIG_NET_IPv6=n
+CONFIG_NSOCKET_DESCRIPTORS=5
+CONFIG_NET_SOCKOPTS=y
+CONFIG_NET_BUFSIZE=1514
+CONFIG_NET_TCP=y
+CONFIG_NET_TCP_CONNS=40
+CONFIG_NET_MAX_LISTENPORTS=40
+CONFIG_NET_UDP=y
+CONFIG_NET_UDP_CHECKSUMS=y
+#CONFIG_NET_UDP_CONNS=10
+CONFIG_NET_ICMP=y
+CONFIG_NET_ICMP_PING=y
+#CONFIG_NET_PINGADDRCONF=0
+CONFIG_NET_STATISTICS=y
+CONFIG_NET_RECEIVE_WINDOW=128
+CONFIG_NET_ARPTAB_SIZE=8
+CONFIG_NET_BROADCAST=n
+#CONFIG_NET_LLH_LEN=14
+#CONFIG_NET_FWCACHE_SIZE=2
+
+#
+# UIP Network Utilities
+# CONFIG_NET_DHCP_LIGHT - Reduces size of DHCP
+# CONFIG_NET_RESOLV_ENTRIES - Number of resolver entries
+CONFIG_NET_DHCP_LIGHT=n
+CONFIG_NET_RESOLV_ENTRIES=4
+
+#
+# Settings for examples/uip
+CONFIG_EXAMPLE_UIP_IPADDR=(192<<24|168<<16|0<<8|128)
+CONFIG_EXAMPLE_UIP_DRIPADDR=(192<<24|168<<16|0<<8|1)
+CONFIG_EXAMPLE_UIP_NETMASK=(255<<24|255<<16|255<<8|0)
+CONFIG_EXAMPLE_UIP_DHCPC=n
+
+#
+# Settings for examples/nettest
+CONFIG_EXAMPLE_NETTEST_SERVER=n
+CONFIG_EXAMPLE_NETTEST_PERFORMANCE=n
+CONFIG_EXAMPLE_NETTEST_NOMAC=n
+CONFIG_EXAMPLE_NETTEST_IPADDR=(192<<24|168<<16|0<<8|128)
+CONFIG_EXAMPLE_NETTEST_DRIPADDR=(192<<24|168<<16|0<<8|1)
+CONFIG_EXAMPLE_NETTEST_NETMASK=(255<<24|255<<16|255<<8|0)
+CONFIG_EXAMPLE_NETTEST_CLIENTIP=(192<<24|168<<16|0<<8|106)
+
+#
+# Settings for apps/nshlib
+#
+CONFIG_EXAMPLES_NSH_CONSOLE=y
+CONFIG_EXAMPLES_NSH_TELNET=n
+CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE=512
+CONFIG_EXAMPLES_NSH_CMD_SIZE=40
+CONFIG_EXAMPLES_NSH_STACKSIZE=4096
+CONFIG_EXAMPLES_NSH_DHCPC=n
+CONFIG_EXAMPLES_NSH_NOMAC=n
+CONFIG_EXAMPLES_NSH_IPADDR=(192<<24|168<<16|10<<8|2)
+CONFIG_EXAMPLES_NSH_DRIPADDR=(192<<24|168<<16|10<<8|1)
+CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
+
+#
+# Stack and heap information
+#
+# CONFIG_BOOT_RUNFROMFLASH - Some configurations support XIP
+#   operation from FLASH but must copy initialized .data sections to RAM.
+# CONFIG_BOOT_COPYTORAM -  Some configurations boot in FLASH
+#   but copy themselves entirely into RAM for better performance.
+# CONFIG_CUSTOM_STACK - The up_ implementation will handle
+#   all stack operations outside of the nuttx model.
+# CONFIG_STACK_POINTER - The initial stack pointer
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2 after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
+# CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
+# CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
+# CONFIG_HEAP_BASE - The beginning of the heap
+# CONFIG_HEAP_SIZE - The size of the heap
+#
+CONFIG_BOOT_RUNFROMFLASH=n
+CONFIG_BOOT_COPYTORAM=n
+CONFIG_CUSTOM_STACK=n
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=8192
+CONFIG_HEAP_BASE=
+CONFIG_HEAP_SIZE=
+
+
+#
+# RGMP specific configuration
+#
+CONFIG_NET_VNET=y
+CONFIG_VNET_NINTERFACES=1
+CONFIG_COM1=y
+CONFIG_COM2=y
+CONFIG_COM3=n
+CONFIG_COM4=n
+CONFIG_E1000=n
\ No newline at end of file
diff --git a/nuttx/configs/rgmp/nsh/setenv.sh b/nuttx/configs/rgmp/nsh/setenv.sh
new file mode 100755
index 000000000..6caf8de84
--- /dev/null
+++ b/nuttx/configs/rgmp/nsh/setenv.sh
@@ -0,0 +1,47 @@
+#!/bin/bash
+# config/rgmp/nsh/setenv.sh
+#
+#   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.
+#
+
+if [ "$(basename $0)" = "setenv.sh" ] ; then
+  echo "You must source this script, not run it!" 1>&2
+  exit 1
+fi
+
+if [ -z ${PATH_ORIG} ]; then export PATH_ORIG=${PATH}; fi
+
+#export NUTTX_BIN=
+#export PATH=${NUTTX_BIN}:/sbin:/usr/sbin:${PATH_ORIG}
+
+echo "PATH : ${PATH}"
diff --git a/nuttx/configs/rgmp/src/README.txt b/nuttx/configs/rgmp/src/README.txt
new file mode 100755
index 000000000..d7d216e24
--- /dev/null
+++ b/nuttx/configs/rgmp/src/README.txt
@@ -0,0 +1 @@
+This directory is reserved for RGMP source files

diff --git a/nuttx/drivers/net/Make.defs b/nuttx/drivers/net/Make.defs
index 244fe4cd7..f3b9d2645 100644
--- a/nuttx/drivers/net/Make.defs
+++ b/nuttx/drivers/net/Make.defs
@@ -46,6 +46,9 @@ endif
 ifeq ($(CONFIG_NET_ENC28J60),y)
 NET_CSRCS  += enc28j60.c
 endif
+ifeq ($(CONFIG_NET_VNET),y)
+NET_CSRCS  += vnet.c
+endif
 ifeq ($(CONFIG_NET_SLIP),y)
 NET_CSRCS  += slip.c
 endif
diff --git a/nuttx/drivers/net/cs89x0.c b/nuttx/drivers/net/cs89x0.c
index 6ec4f4f80..5b616233d 100644
--- a/nuttx/drivers/net/cs89x0.c
+++ b/nuttx/drivers/net/cs89x0.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * drivers/net/cs89x0.c
  *
- *   Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
+ *   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
@@ -551,7 +551,7 @@ static inline FAR struct cs89x0_driver_s *cs89x0_mapirq(int irq)
           return g_cs89x0[i];
         }
     }
-  return NULL'
+  return NULL;
 }
 #endif
 
diff --git a/nuttx/drivers/net/vnet.c b/nuttx/drivers/net/vnet.c
new file mode 100644
index 000000000..6475334b5
--- /dev/null
+++ b/nuttx/drivers/net/vnet.c
@@ -0,0 +1,674 @@
+/****************************************************************************
+ * drivers/net/vnet.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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#if defined(CONFIG_NET) && defined(CONFIG_NET_VNET)
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <time.h>
+#include <string.h>
+#include <debug.h>
+#include <wdog.h>
+#include <errno.h>
+
+#include <nuttx/irq.h>
+#include <nuttx/arch.h>
+
+#include <net/uip/uip.h>
+#include <net/uip/uip-arp.h>
+#include <net/uip/uip-arch.h>
+
+#include <rgmp/vnet.h>
+#include <rgmp/stdio.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* CONFIG_VNET_NINTERFACES determines the number of physical interfaces
+ * that will be supported.
+ */
+
+#ifndef CONFIG_VNET_NINTERFACES
+# define CONFIG_VNET_NINTERFACES 1
+#endif
+
+/* TX poll deley = 1 seconds. CLK_TCK is the number of clock ticks per second */
+
+#define VNET_WDDELAY   (1*CLK_TCK)
+#define VNET_POLLHSEC  (1*2)
+
+/* TX timeout = 1 minute */
+
+#define VNET_TXTIMEOUT (60*CLK_TCK)
+
+/* This is a helper pointer for accessing the contents of the Ethernet header */
+
+#define BUF ((struct uip_eth_hdr *)vnet->sk_dev.d_buf)
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/* The vnet_driver_s encapsulates all state information for a single hardware
+ * interface
+ */
+
+struct vnet_driver_s
+{
+    bool sk_bifup;               /* true:ifup false:ifdown */
+    WDOG_ID sk_txpoll;           /* TX poll timer */
+    //WDOG_ID sk_txtimeout;        /* TX timeout timer */
+
+    /* This holds the information visible to uIP/NuttX */
+    struct rgmp_vnet *vnet;
+    struct uip_driver_s sk_dev;  /* Interface understood by uIP */
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct vnet_driver_s g_vnet[CONFIG_VNET_NINTERFACES];
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/* Common TX logic */
+
+static int  vnet_transmit(FAR struct vnet_driver_s *vnet);
+static int  vnet_uiptxpoll(struct uip_driver_s *dev);
+
+/* Interrupt handling */
+
+static void vnet_receive(FAR struct vnet_driver_s *vnet);
+static void vnet_txdone(FAR struct vnet_driver_s *vnet);
+
+/* Watchdog timer expirations */
+
+static void vnet_polltimer(int argc, uint32_t arg, ...);
+static void vnet_txtimeout(int argc, uint32_t arg, ...);
+
+/* NuttX callback functions */
+
+static int vnet_ifup(struct uip_driver_s *dev);
+static int vnet_ifdown(struct uip_driver_s *dev);
+static int vnet_txavail(struct uip_driver_s *dev);
+#ifdef CONFIG_NET_IGMP
+static int vnet_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac);
+static int vnet_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac);
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: vnet_transmit
+ *
+ * Description:
+ *   Start hardware transmission.  Called either from the txdone interrupt
+ *   handling or from watchdog based polling.
+ *
+ * Parameters:
+ *   vnet  - Reference to the driver state structure
+ *
+ * Returned Value:
+ *   OK on success; a negated errno on failure
+ *
+ * Assumptions:
+ *   May or may not be called from an interrupt handler.  In either case,
+ *   global interrupts are disabled, either explicitly or indirectly through
+ *   interrupt handling logic.
+ *
+ ****************************************************************************/
+
+static int vnet_transmit(FAR struct vnet_driver_s *vnet)
+{
+    int err;
+
+  /* Verify that the hardware is ready to send another packet.  If we get
+   * here, then we are committed to sending a packet; Higher level logic
+   * must have assured that there is not transmission in progress.
+   */
+
+  /* Increment statistics */
+
+  /* Send the packet: address=vnet->sk_dev.d_buf, length=vnet->sk_dev.d_len */
+    err = vnet_xmit(vnet->vnet, (char *)vnet->sk_dev.d_buf, vnet->sk_dev.d_len);
+    if (err) {
+	/* Setup the TX timeout watchdog (perhaps restarting the timer) */
+	//(void)wd_start(vnet->sk_txtimeout, VNET_TXTIMEOUT, vnet_txtimeout, 1, (uint32_t)vnet);
+
+	// When vnet_xmit fail, it means TX buffer is full. Watchdog 
+	// is of no use here because no TX done INT will happen. So 
+	// we reset the TX buffer directly.
+#ifdef CONFIG_DEBUG
+	cprintf("VNET: TX buffer is full\n");
+#endif
+	return ERROR;
+    }
+    else {
+	// this step may be unnecessary here
+	vnet_txdone(vnet);
+    }
+
+    return OK;
+}
+
+/****************************************************************************
+ * Function: vnet_uiptxpoll
+ *
+ * Description:
+ *   The transmitter is available, check if uIP has any outgoing packets ready
+ *   to send.  This is a callback from uip_poll().  uip_poll() may be called:
+ *
+ *   1. When the preceding TX packet send is complete,
+ *   2. When the preceding TX packet send timesout and the interface is reset
+ *   3. During normal TX polling
+ *
+ * Parameters:
+ *   dev  - Reference to the NuttX driver state structure
+ *
+ * Returned Value:
+ *   OK on success; a negated errno on failure
+ *
+ * Assumptions:
+ *   May or may not be called from an interrupt handler.  In either case,
+ *   global interrupts are disabled, either explicitly or indirectly through
+ *   interrupt handling logic.
+ *
+ ****************************************************************************/
+
+static int vnet_uiptxpoll(struct uip_driver_s *dev)
+{
+  FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)dev->d_private;
+
+  /* If the polling resulted in data that should be sent out on the network,
+   * the field d_len is set to a value > 0.
+   */
+
+  if (vnet->sk_dev.d_len > 0)
+    {
+      uip_arp_out(&vnet->sk_dev);
+      vnet_transmit(vnet);
+
+      /* Check if there is room in the device to hold another packet. If not,
+       * return a non-zero value to terminate the poll.
+       */
+      if (vnet_is_txbuff_full(vnet->vnet))
+	  return 1;
+    }
+
+  /* If zero is returned, the polling will continue until all connections have
+   * been examined.
+   */
+
+  return 0;
+}
+
+/****************************************************************************
+ * Function: vnet_receive
+ *
+ * Description:
+ *   An interrupt was received indicating the availability of a new RX packet
+ *
+ * Parameters:
+ *   vnet  - Reference to the driver state structure
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   Global interrupts are disabled by interrupt handling logic.
+ *
+ ****************************************************************************/
+
+void rtos_vnet_recv(struct rgmp_vnet *vnet_dummy, char *data, int len)
+{
+    // now only support 1 vnet
+    struct vnet_driver_s *vnet = &g_vnet[0];
+
+    do {
+	/* Check for errors and update statistics */
+
+	/* Check if the packet is a valid size for the uIP buffer configuration */
+	if (len > CONFIG_NET_BUFSIZE || len < 14) {
+#ifdef CONFIG_DEBUG
+	    cprintf("VNET: receive invalid packet of size %d\n", len);
+#endif
+	    return;
+	}
+
+	// Copy the data data from the hardware to vnet->sk_dev.d_buf.  Set
+	// amount of data in vnet->sk_dev.d_len
+	memcpy(vnet->sk_dev.d_buf, data, len);
+	vnet->sk_dev.d_len = len;
+
+	/* We only accept IP packets of the configured type and ARP packets */
+
+#ifdef CONFIG_NET_IPv6
+	if (BUF->type == HTONS(UIP_ETHTYPE_IP6))
+#else
+	if (BUF->type == HTONS(UIP_ETHTYPE_IP))
+#endif
+	{
+	    uip_arp_ipin(&vnet->sk_dev);
+	    uip_input(&vnet->sk_dev);
+
+	    // If the above function invocation resulted in data that should be
+	    // sent out on the network, the field  d_len will set to a value > 0.
+	    if (vnet->sk_dev.d_len > 0) {
+		uip_arp_out(&vnet->sk_dev);
+		vnet_transmit(vnet);
+	    }
+	}
+	else if (BUF->type == htons(UIP_ETHTYPE_ARP)) {
+	    uip_arp_arpin(&vnet->sk_dev);
+
+	    // If the above function invocation resulted in data that should be
+	    // sent out on the network, the field  d_len will set to a value > 0.
+	    if (vnet->sk_dev.d_len > 0) {
+		vnet_transmit(vnet);
+	    }
+	}
+    }
+    while (0); /* While there are more packets to be processed */
+}
+
+/****************************************************************************
+ * Function: vnet_txdone
+ *
+ * Description:
+ *   An interrupt was received indicating that the last TX packet(s) is done
+ *
+ * Parameters:
+ *   vnet  - Reference to the driver state structure
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   Global interrupts are disabled by the watchdog logic.
+ *
+ ****************************************************************************/
+
+static void vnet_txdone(FAR struct vnet_driver_s *vnet)
+{
+  /* Check for errors and update statistics */
+
+  /* If no further xmits are pending, then cancel the TX timeout and
+   * disable further Tx interrupts.
+   */
+
+  //wd_cancel(vnet->sk_txtimeout);
+
+  /* Then poll uIP for new XMIT data */
+
+  (void)uip_poll(&vnet->sk_dev, vnet_uiptxpoll);
+}
+
+/****************************************************************************
+ * Function: vnet_txtimeout
+ *
+ * Description:
+ *   Our TX watchdog timed out.  Called from the timer interrupt handler.
+ *   The last TX never completed.  Reset the hardware and start again.
+ *
+ * Parameters:
+ *   argc - The number of available arguments
+ *   arg  - The first argument
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   Global interrupts are disabled by the watchdog logic.
+ *
+ ****************************************************************************/
+
+static void vnet_txtimeout(int argc, uint32_t arg, ...)
+{
+  FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)arg;
+
+  /* Increment statistics and dump debug info */
+
+  /* Then reset the hardware */
+
+  /* Then poll uIP for new XMIT data */
+
+  (void)uip_poll(&vnet->sk_dev, vnet_uiptxpoll);
+}
+
+/****************************************************************************
+ * Function: vnet_polltimer
+ *
+ * Description:
+ *   Periodic timer handler.  Called from the timer interrupt handler.
+ *
+ * Parameters:
+ *   argc - The number of available arguments
+ *   arg  - The first argument
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   Global interrupts are disabled by the watchdog logic.
+ *
+ ****************************************************************************/
+
+static void vnet_polltimer(int argc, uint32_t arg, ...)
+{
+  FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)arg;
+
+  /* Check if there is room in the send another TX packet.  We cannot perform
+   * the TX poll if he are unable to accept another packet for transmission.
+   */
+  if (vnet_is_txbuff_full(vnet->vnet)) {
+#ifdef CONFIG_DEBUG
+      cprintf("VNET: TX buffer is full\n");
+#endif
+      return;
+  }
+
+  /* If so, update TCP timing states and poll uIP for new XMIT data. Hmmm..
+   * might be bug here.  Does this mean if there is a transmit in progress,
+   * we will missing TCP time state updates?
+   */
+
+  (void)uip_timer(&vnet->sk_dev, vnet_uiptxpoll, VNET_POLLHSEC);
+
+  /* Setup the watchdog poll timer again */
+
+  (void)wd_start(vnet->sk_txpoll, VNET_WDDELAY, vnet_polltimer, 1, arg);
+}
+
+/****************************************************************************
+ * Function: vnet_ifup
+ *
+ * Description:
+ *   NuttX Callback: Bring up the Ethernet interface when an IP address is
+ *   provided 
+ *
+ * Parameters:
+ *   dev  - Reference to the NuttX driver state structure
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+static int vnet_ifup(struct uip_driver_s *dev)
+{
+  FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)dev->d_private;
+
+  ndbg("Bringing up: %d.%d.%d.%d\n",
+       dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff,
+       (dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24 );
+
+  /* Initialize PHYs, the Ethernet interface, and setup up Ethernet interrupts */
+
+  /* Set and activate a timer process */
+
+  (void)wd_start(vnet->sk_txpoll, VNET_WDDELAY, vnet_polltimer, 1, (uint32_t)vnet);
+
+  vnet->sk_bifup = true;
+  return OK;
+}
+
+/****************************************************************************
+ * Function: vnet_ifdown
+ *
+ * Description:
+ *   NuttX Callback: Stop the interface.
+ *
+ * Parameters:
+ *   dev  - Reference to the NuttX driver state structure
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+static int vnet_ifdown(struct uip_driver_s *dev)
+{
+  FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)dev->d_private;
+  irqstate_t flags;
+
+  /* Disable the Ethernet interrupt */
+
+  flags = irqsave();
+
+  /* Cancel the TX poll timer and TX timeout timers */
+
+  wd_cancel(vnet->sk_txpoll);
+  //wd_cancel(vnet->sk_txtimeout);
+
+  /* Put the the EMAC is its reset, non-operational state.  This should be
+   * a known configuration that will guarantee the vnet_ifup() always
+   * successfully brings the interface back up.
+   */
+
+  /* Mark the device "down" */
+
+  vnet->sk_bifup = false;
+  irqrestore(flags);
+  return OK;
+}
+
+/****************************************************************************
+ * Function: vnet_txavail
+ *
+ * Description:
+ *   Driver callback invoked when new TX data is available.  This is a 
+ *   stimulus perform an out-of-cycle poll and, thereby, reduce the TX
+ *   latency.
+ *
+ * Parameters:
+ *   dev  - Reference to the NuttX driver state structure
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   Called in normal user mode
+ *
+ ****************************************************************************/
+
+static int vnet_txavail(struct uip_driver_s *dev)
+{
+  FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)dev->d_private;
+  irqstate_t flags;
+
+  /* Disable interrupts because this function may be called from interrupt
+   * level processing.
+   */
+
+  flags = irqsave();
+
+  /* Ignore the notification if the interface is not yet up */
+
+  if (vnet->sk_bifup)
+    {
+      /* Check if there is room in the hardware to hold another outgoing packet. */
+	if (vnet_is_txbuff_full(vnet->vnet)) {
+#ifdef CONFIG_DEBUG
+	    cprintf("VNET: TX buffer is full\n");
+#endif
+	    goto out;
+	}
+
+      /* If so, then poll uIP for new XMIT data */
+
+      (void)uip_poll(&vnet->sk_dev, vnet_uiptxpoll);
+    }
+
+ out:
+  irqrestore(flags);
+  return OK;
+}
+
+/****************************************************************************
+ * Function: vnet_addmac
+ *
+ * Description:
+ *   NuttX Callback: Add the specified MAC address to the hardware multicast
+ *   address filtering
+ *
+ * Parameters:
+ *   dev  - Reference to the NuttX driver state structure
+ *   mac  - The MAC address to be added 
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_IGMP
+static int vnet_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac)
+{
+  FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)dev->d_private;
+
+  /* Add the MAC address to the hardware multicast routing table */
+
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Function: vnet_rmmac
+ *
+ * Description:
+ *   NuttX Callback: Remove the specified MAC address from the hardware multicast
+ *   address filtering
+ *
+ * Parameters:
+ *   dev  - Reference to the NuttX driver state structure
+ *   mac  - The MAC address to be removed 
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_IGMP
+static int vnet_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac)
+{
+  FAR struct vnet_driver_s *vnet = (FAR struct vnet_driver_s *)dev->d_private;
+
+  /* Add the MAC address to the hardware multicast routing table */
+
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: vnet_initialize
+ *
+ * Description:
+ *   Initialize the Ethernet controller and driver
+ *
+ * Parameters:
+ *   intf - In the case where there are multiple EMACs, this value
+ *          identifies which EMAC is to be initialized.
+ *
+ * Returned Value:
+ *   OK on success; Negated errno on failure.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+void vnet_initialize(void)
+{
+  struct vnet_driver_s *priv;
+  struct rgmp_vnet *vnet = vnet_list.next;
+  int i;
+
+  for (i=0; i<CONFIG_VNET_NINTERFACES; i++) {
+      if (vnet == NULL)
+	  break;
+      priv = &g_vnet[i];
+
+      /* Initialize the driver structure */
+
+      memset(priv, 0, sizeof(struct vnet_driver_s));
+      priv->sk_dev.d_ifup    = vnet_ifup;     /* I/F down callback */
+      priv->sk_dev.d_ifdown  = vnet_ifdown;   /* I/F up (new IP address) callback */
+      priv->sk_dev.d_txavail = vnet_txavail;  /* New TX data callback */
+#ifdef CONFIG_NET_IGMP
+      priv->sk_dev.d_addmac  = vnet_addmac;   /* Add multicast MAC address */
+      priv->sk_dev.d_rmmac   = vnet_rmmac;    /* Remove multicast MAC address */
+#endif
+      priv->sk_dev.d_private = (void*)g_vnet; /* Used to recover private state from dev */
+
+      /* Create a watchdog for timing polling for and timing of transmisstions */
+
+      priv->sk_txpoll       = wd_create();   /* Create periodic poll timer */
+      //priv->sk_txtimeout    = wd_create();   /* Create TX timeout timer */
+
+      priv->vnet = vnet;
+
+      /* Register the device with the OS */
+
+      (void)netdev_register(&priv->sk_dev);
+      vnet = vnet->next;
+  }
+}
+
+#endif /* CONFIG_NET && CONFIG_NET_VNET */
diff --git a/nuttx/drivers/serial/serial.c b/nuttx/drivers/serial/serial.c
index 3fa3b43d3..3df4a4e18 100644
--- a/nuttx/drivers/serial/serial.c
+++ b/nuttx/drivers/serial/serial.c
@@ -1,7 +1,7 @@
 /************************************************************************************
  * drivers/serial/serial.c
  *
- *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -169,7 +169,7 @@ static void uart_putxmitchar(FAR uart_dev_t *dev, int ch)
       nexthead = 0;
     }
 
-  for(;;)
+  for (;;)
     {
       if (nexthead != dev->xmit.tail)
         {
@@ -271,7 +271,7 @@ static ssize_t uart_write(FAR struct file *filep, FAR const char *buffer, size_t
 
       uart_putxmitchar(dev, ch);
 
-     /* If this is the console, then we should replace LF with LF-CR */
+      /* If this is the console, then we should replace LF with LF-CR */
 
       if (dev->isconsole && ch == '\n')
         {