This commit brings in the drivers needed to support OpenAMP. These changes were ported from https://github.com/FishsemiCode/nuttx. The current state: Most drivers do now compile but are not yet verfied.

This port was effort of a number of people, I rather arbitrarily gave authorship to Guiding Li because he has the largest number of fundamental quashed commits from the Xiamoi repository. Squashed commit of the following: Author: Xiang Xiao <xiaoxiang@pinecone.net> include/nuttx/b2c.h and libx/libc/string: Add non-standard string functions to deal with cases where there are more than 8-bits in a type char. Author: Gregory Nutt <gnutt@nuttx.org> Fix several build issues/missing definitiona needed for OpenAMP build in drivers/. Add OpenAMP code has been reviewed and ran through tools/nxstyle (with all reports accounted for). Author: Xiang Xiao <xiaoxiang@xiaomi.com> tools/: Fix the minor issue in Makefile Author: Gregory Nutt <gnutt@nuttx.org> drivers/rptun/rptun.c: Review for coding standard. Run against tools/nxstyle. tools/LibTargets.mk: Fix some TABs that were turned into spaces by a copy-paste. fs/hostfs: Add configure and build support for hostfs RPC. drivers/timer: Add configure and build support for syslog RTC. drivers/syslog: Add configure and build support for syslog RPC. drivers/serial: Add configure and build support for serial RPC. Kconfig, tools/*.mk. openamp/: Add basic OpenAMP build support. drivers/rptun: Add configure and build support for OpenAMP tunnel drivers. drivers/net: Update Make.defs and Kconfig for OpenSDA support. Remove drivers/clk/clk-rpmsg.c drivers/power/rpmsg_regulator.c. These depend on upstreaming support for a new subsystem based on the clk/regulator is model from Linux. Removed because we want to separate the activities. We will just try to get the basic OpenAMP support in place for now. Remove drivers/misc/misc_rpmsg.c and include/nuttx/misc/misc_rpmsg.h. These are specific to the Xiaomi application. Author: zhuyanlin <zhuyanlin@pinecone.net> This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx. Initial commit is source files only. Additional changes to Kconfig and Make.defs files still needed. Author: Jianli Dong <dongjianli@pinecone.net> This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx. Initial commit is source files only. Additional changes to Kconfig and Make.defs files still needed. Author: Guiding Li <liguiding@pinecone.net> This commit brings in the OpenAMP OS driver/RPC components from https://github.com/FishsemiCode/nuttx. Initial commit is source files only. Additional changes to Kconfig and Make.defs files still needed.
2026-06-04 14:53:47 +08:00 · 2019-11-02 11:30:33 -06:00
parent 58e7b9dbdc
commit 8b92305265
56 changed files with 7534 additions and 7 deletions
@@ -1799,6 +1799,11 @@ source libs/libxx/Kconfig
 source libs/libdsp/Kconfig
 endmenu

+menu "Open Asymmetric Multi Processing"
+source openamp/Kconfig
+endmenu
+
 menu "Application Configuration"
 source "$APPSDIR/Kconfig"
 endmenu
+
@@ -312,6 +312,17 @@ endif # PIPES

 source drivers/power/Kconfig

+menuconfig RPTUN
+	bool "Remote Proc Tunnel Driver Support"
+	default n
+	depends on OPENAMP
+	---help---
+		RPTUN driver is used for multi-cores' communication.
+
+if RPTUN
+source drivers/rptun/Kconfig
+endif # RPTUN
+
 menuconfig SENSORS
 	bool "Sensor Device Support"
 	default n
@@ -68,6 +68,7 @@ include eeprom$(DELIM)Make.defs
 include net$(DELIM)Make.defs
 include pipes$(DELIM)Make.defs
 include power$(DELIM)Make.defs
+include rptun$(DELIM)Make.defs
 include sensors$(DELIM)Make.defs
 include serial$(DELIM)Make.defs
 include spi$(DELIM)Make.defs
@@ -16,6 +16,29 @@ config NETDEV_LOOPBACK
 if NETDEV_LOOPBACK
 endif # NETDEV_LOOPBACK

+config NET_RPMSG_DRV
+	bool "RPMSG net driver"
+	depends on NET && OPENAMP
+	select ARCH_HAVE_NETDEV_STATISTICS
+	---help---
+		Use the rpmsg as net device, transfer packet between remoteproc.
+
+if NET_RPMSG_DRV
+
+config NET_RPMSG_PRIORITY
+	int "net prmsg priority"
+	default 100
+	---help---
+		The priority for net rmpsg task.
+
+config NET_RPMSG_STACKSIZE
+	int "net rpmsg stack size"
+	default 2048
+	---help---
+		The stack size allocated for the net rpmsg task.
+
+endif # NET_RPMSG_DRV
+
 config NETDEV_TELNET
 	bool "Telnet driver"
 	default n
@@ -43,6 +43,10 @@ ifeq ($(CONFIG_NETDEV_LOOPBACK),y)
  CSRCS += loopback.c
 endif

+ifeq ($(CONFIG_NET_RPMSG_DRV),y)
+  CSRCS += rpmsgdrv.c
+endif
+
 ifeq ($(CONFIG_NETDEV_TELNET),y)
  CSRCS += telnet.c
 endif
@@ -0,0 +1,16 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if RPTUN
+
+config RPTUN_PRIORITY
+	int "rpturn thread priority"
+	default 224
+
+config RPTUN_STACKSIZE
+	int "rptun stack size"
+	default 2048
+
+endif
@@ -0,0 +1,45 @@
+############################################################################
+# drivers/rptun/Make.defs
+#
+#   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+#   Author: Guiding Li<liguiding@pinecone.net>
+#
+# 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.
+#
+############################################################################
+
+# Don't build anything if there is no RPTUN support
+
+ifeq ($(CONFIG_RPTUN),y)
+
+CSRCS += rptun.c
+
+DEPPATH += --dep-path rptun
+VPATH += :rptun
+CFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" $(TOPDIR)$(DELIM)drivers$(DELIM)rptun}
+endif
@@ -56,6 +56,21 @@ config MCU_SERIAL
 	bool
 	default n

+config RPMSG_UART
+	bool "UART rpmsg support"
+	default n
+	depends on OPENAMP
+	select ARCH_HAVE_SERIAL_TERMIOS
+	select SERIAL_RXDMA
+	select SERIAL_TXDMA
+	select SERIAL_REMOVABLE
+	select SERIAL_IFLOWCONTROL
+
+config RPMSG_SERIALINIT
+	bool "Add dummy up_serialinit for UART rpmsg"
+	default !16550_UART && !CMSDK_UART && !MCU_SERIAL
+	depends on RPMSG_UART
+
 #
 # Standard serial driver configuration
 #
@@ -47,6 +47,10 @@ ifeq ($(CONFIG_16550_UART),y)
  CSRCS += uart_16550.c
 endif

+ifeq ($(CONFIG_RPMSG_UART),y)
+  CSRCS += uart_rpmsg.c
+endif
+
 # termios support

 ifeq ($(CONFIG_SERIAL_TERMIOS),y)
@@ -172,6 +172,14 @@ config SYSLOG_CONSOLE
 	---help---
 		Use the system console as a SYSLOG output device.

+config SYSLOG_RPMSG
+	bool "Log to RPMSG"
+	depends on OPENAMP
+	depends on SCHED_WORKQUEUE
+	select SYSLOG_WRITE
+	---help---
+		Use the rpmsg as a SYSLOG output device, send message to remote proc.
+
 config SYSLOG_NONE
 	bool "No SYSLOG device"
 	---help---
@@ -180,6 +188,18 @@ config SYSLOG_NONE

 endchoice

+config SYSLOG_RPMSG_WORK_DELAY
+	int "SYSLOG RPMSG work delay(ms)"
+	default 100
+	depends on SYSLOG_RPMSG
+
+config SYSLOG_RPMSG_SERVER
+	bool "Enable RPMSG server for SYSLOG"
+	default n
+	depends on OPENAMP
+	---help---
+		Use rpmsg to receive message from remote proc.
+
 config SYSLOG_FILE
 	bool "Syslog file output"
 	default n
@@ -84,6 +84,14 @@ ifeq ($(CONFIG_SYSLOG_CHARDEV),y)
 CSRCS += syslog_chardev.c
 endif

+ifeq ($(CONFIG_SYSLOG_RPMSG),y)
+  CSRCS += syslog_rpmsg.c
+endif
+
+ifeq ($(CONFIG_SYSLOG_RPMSG_SERVER),y)
+  CSRCS += syslog_rpmsg_server.c
+endif
+
 ifeq ($(CONFIG_CONSOLE_SYSLOG),y)
  CSRCS += syslog_console.c
 endif
@@ -0,0 +1,417 @@
+/****************************************************************************
+ * drivers/syslog/syslog_rpmsg.c
+ * Syslog driver for rpmsg syslog
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 <ctype.h>
+#include <errno.h>
+#include <string.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/irq.h>
+#include <nuttx/rptun/openamp.h>
+#include <nuttx/syslog/syslog.h>
+#include <nuttx/syslog/syslog_rpmsg.h>
+#include <nuttx/wqueue.h>
+
+#include "syslog.h"
+#include "syslog_rpmsg.h"
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#define SYSLOG_RPMSG_WORK_DELAY         MSEC2TICK(CONFIG_SYSLOG_RPMSG_WORK_DELAY)
+
+#define SYSLOG_RPMSG_COUNT(h, t, size)  ((B2C_OFF(h)>=(t)) ? \
+                                          B2C_OFF(h)-(t) : \
+                                          (size)-((t)-B2C_OFF(h)))
+#define SYSLOG_RPMSG_SPACE(h, t, size)  ((size) - 1 - SYSLOG_RPMSG_COUNT(h, t, size))
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct syslog_rpmsg_s
+{
+  volatile size_t       head;         /* The head index (where data is added) */
+  volatile size_t       tail;         /* The tail index (where data is removed) */
+  size_t                size;         /* Size of the RAM buffer */
+  FAR char              *buffer;      /* Circular RAM buffer */
+  struct work_s         work;         /* Used for deferred callback work */
+
+  struct rpmsg_endpoint ept;
+  FAR const char        *cpuname;
+  bool                  suspend;
+  bool                  transfer;     /* The transfer flag */
+  ssize_t               trans_len;    /* The data length when transfer */
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static void syslog_rpmsg_work(FAR void *priv_);
+static void syslog_rpmsg_putc(FAR struct syslog_rpmsg_s *priv, int ch,
+                              bool last);
+static int  syslog_rpmsg_flush(void);
+static ssize_t syslog_rpmsg_write(FAR const char *buffer, size_t buflen);
+static void syslog_rpmsg_device_created(FAR struct rpmsg_device *rdev,
+                                        FAR void *priv_);
+static void syslog_rpmsg_device_destroy(FAR struct rpmsg_device *rdev,
+                                        FAR void *priv_);
+static int  syslog_rpmsg_ept_cb(FAR struct rpmsg_endpoint *ept,
+                                FAR void *data, size_t len, uint32_t src,
+                                FAR void *priv_);
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct syslog_rpmsg_s g_syslog_rpmsg;
+
+static const struct syslog_channel_s g_syslog_rpmsg_channel =
+{
+  up_putc,
+  up_putc,
+  syslog_rpmsg_flush,
+  syslog_rpmsg_write,
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void syslog_rpmsg_work(FAR void *priv_)
+{
+  FAR struct syslog_rpmsg_transfer_s *msg = NULL;
+  FAR struct syslog_rpmsg_s *priv = priv_;
+  irqstate_t flags;
+  uint32_t space;
+  size_t len;
+  size_t len_end;
+
+  if (is_rpmsg_ept_ready(&priv->ept))
+    {
+      msg = rpmsg_get_tx_payload_buffer(&priv->ept, &space, false);
+    }
+
+  if (!msg)
+    {
+      work_queue(HPWORK, &priv->work, syslog_rpmsg_work, priv,
+                 SYSLOG_RPMSG_WORK_DELAY);
+      return;
+    }
+
+  memset(msg, 0, sizeof(*msg));
+
+  flags = enter_critical_section();
+
+  if (B2C_REM(priv->head))
+    {
+      priv->head += C2B(1) - B2C_REM(priv->head);
+    }
+
+  space  -= sizeof(*msg);
+  len     = SYSLOG_RPMSG_COUNT(priv->head, priv->tail, priv->size);
+  len_end = priv->size - priv->tail;
+
+  if (len > space)
+    {
+      len = space;
+    }
+
+  if (len > len_end)
+    {
+      memcpy(msg->data, &priv->buffer[priv->tail], len_end);
+      memcpy(msg->data + len_end, priv->buffer, len - len_end);
+    }
+  else
+    {
+      memcpy(msg->data, &priv->buffer[priv->tail], len);
+    }
+
+  priv->trans_len = len;
+  priv->transfer  = true;
+
+  leave_critical_section(flags);
+
+  msg->header.command = SYSLOG_RPMSG_TRANSFER;
+  msg->count          = C2B(len);
+  rpmsg_send_nocopy(&priv->ept, msg, sizeof(*msg) + len);
+}
+
+static void syslog_rpmsg_putc(FAR struct syslog_rpmsg_s *priv, int ch,
+                              bool last)
+{
+  if (B2C_REM(priv->head) == 0)
+    {
+      priv->buffer[B2C_OFF(priv->head)] = 0;
+    }
+
+  priv->buffer[B2C_OFF(priv->head)] |= (ch & 0xff) << (8 * B2C_REM(priv->head));
+
+  priv->head += 1;
+  if (priv->head >= C2B(priv->size))
+    {
+      priv->head = 0;
+    }
+
+  /* Allow overwrite */
+
+  if (priv->head == C2B(priv->tail))
+    {
+      priv->buffer[priv->tail] = 0;
+
+      priv->tail += 1;
+      if (priv->tail >= priv->size)
+        {
+          priv->tail = 0;
+        }
+
+      if (priv->transfer)
+        {
+          priv->trans_len--;
+        }
+    }
+
+  if (last && !priv->suspend && !priv->transfer)
+    {
+      clock_t delay = SYSLOG_RPMSG_WORK_DELAY;
+      size_t space = SYSLOG_RPMSG_SPACE(priv->head, priv->tail, priv->size);
+
+      /* Start work immediately when data more then 75% and meet '\n' */
+
+      if (space < priv->size / 4 && ch == '\n')
+        {
+          delay = 0;
+        }
+
+      work_queue(HPWORK, &priv->work, syslog_rpmsg_work, priv, delay);
+    }
+}
+
+static int syslog_rpmsg_flush(void)
+{
+  FAR struct syslog_rpmsg_s *priv = &g_syslog_rpmsg;
+
+  work_queue(HPWORK, &priv->work, syslog_rpmsg_work, priv, 0);
+  return OK;
+}
+
+static ssize_t syslog_rpmsg_write(FAR const char *buffer, size_t buflen)
+{
+  FAR struct syslog_rpmsg_s *priv = &g_syslog_rpmsg;
+  irqstate_t flags;
+  size_t nwritten;
+
+  flags = enter_critical_section();
+  for (nwritten = 1; nwritten <= buflen; nwritten++)
+    {
+      syslog_rpmsg_putc(priv, *buffer++, nwritten == buflen);
+    }
+
+  leave_critical_section(flags);
+
+  return buflen;
+}
+
+static void syslog_rpmsg_device_created(FAR struct rpmsg_device *rdev,
+                                        FAR void *priv_)
+{
+  FAR struct syslog_rpmsg_s *priv = priv_;
+  int ret;
+
+  if (priv->buffer && strcmp(priv->cpuname, rpmsg_get_cpuname(rdev)) == 0)
+    {
+      priv->ept.priv = priv;
+
+      ret = rpmsg_create_ept(&priv->ept, rdev, SYSLOG_RPMSG_EPT_NAME,
+                             RPMSG_ADDR_ANY, RPMSG_ADDR_ANY,
+                             syslog_rpmsg_ept_cb, NULL);
+      if (ret == 0)
+        {
+          work_queue(HPWORK, &priv->work,
+                     syslog_rpmsg_work, priv, SYSLOG_RPMSG_WORK_DELAY);
+        }
+    }
+}
+
+static void syslog_rpmsg_device_destroy(FAR struct rpmsg_device *rdev,
+                                        FAR void *priv_)
+{
+  FAR struct syslog_rpmsg_s *priv = priv_;
+
+  if (priv->buffer && strcmp(priv->cpuname, rpmsg_get_cpuname(rdev)) == 0)
+    {
+      rpmsg_destroy_ept(&priv->ept);
+    }
+}
+
+static int syslog_rpmsg_ept_cb(FAR struct rpmsg_endpoint *ept, FAR void *data,
+                               size_t len, uint32_t src, FAR void *priv_)
+{
+  FAR struct syslog_rpmsg_s *priv = priv_;
+  FAR struct syslog_rpmsg_header_s *header = data;
+
+  if (header->command == SYSLOG_RPMSG_SUSPEND)
+    {
+      work_cancel(HPWORK, &priv->work);
+      priv->suspend = true;
+    }
+  else if (header->command == SYSLOG_RPMSG_RESUME)
+    {
+      priv->suspend = false;
+      work_queue(HPWORK, &priv->work,
+        syslog_rpmsg_work, priv, SYSLOG_RPMSG_WORK_DELAY);
+    }
+  else if (header->command == SYSLOG_RPMSG_TRANSFER_DONE)
+    {
+      irqstate_t flags;
+      ssize_t len_end;
+
+      flags = enter_critical_section();
+
+      if (priv->trans_len > 0)
+        {
+          len_end = priv->size - priv->tail;
+
+          if (priv->trans_len > len_end)
+            {
+              memset(&priv->buffer[priv->tail], 0, len_end);
+              memset(priv->buffer, 0, priv->trans_len - len_end);
+            }
+          else
+            {
+              memset(&priv->buffer[priv->tail], 0, priv->trans_len);
+            }
+
+          priv->tail += priv->trans_len;
+          if (priv->tail >= priv->size)
+            {
+              priv->tail -= priv->size;
+            }
+        }
+
+      priv->transfer = false;
+
+      if (SYSLOG_RPMSG_COUNT(priv->head, priv->tail, priv->size))
+        {
+          work_queue(HPWORK, &priv->work, syslog_rpmsg_work, priv, 0);
+        }
+
+      leave_critical_section(flags);
+    }
+
+  return 0;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int up_putc(int ch)
+{
+  FAR struct syslog_rpmsg_s *priv = &g_syslog_rpmsg;
+  irqstate_t flags;
+
+  flags = enter_critical_section();
+  syslog_rpmsg_putc(priv, ch, true);
+  leave_critical_section(flags);
+
+  return ch;
+}
+
+int syslog_rpmsg_init_early(FAR const char *cpuname, FAR void *buffer,
+                            size_t size)
+{
+  FAR struct syslog_rpmsg_s *priv = &g_syslog_rpmsg;
+  char prev, cur;
+  size_t i;
+  size_t j;
+
+  priv->cpuname = cpuname;
+  priv->buffer  = buffer;
+  priv->size    = size;
+
+  prev = (priv->buffer[size - 1] >> (CHAR_BIT - 8)) & 0xff;
+
+  for (i = 0; i < size; i++)
+    {
+      for (j = 0; j * 8 < CHAR_BIT; j++)
+        {
+          cur = (priv->buffer[i] >> j * 8) & 0xff;
+
+          if (!isascii(cur))
+            {
+              goto out;
+            }
+
+          if (prev && !cur)
+            {
+              priv->head = C2B(i) + j;
+            }
+
+          if (!prev && cur)
+            {
+              priv->tail = i;
+            }
+
+          prev = cur;
+        }
+    }
+
+out:
+  if (i != size)
+    {
+      priv->head = priv->tail = 0;
+      memset(priv->buffer, 0, size);
+    }
+
+  return syslog_channel(&g_syslog_rpmsg_channel);
+}
+
+int syslog_rpmsg_init(void)
+{
+  return rpmsg_register_callback(&g_syslog_rpmsg,
+                                 syslog_rpmsg_device_created,
+                                 syslog_rpmsg_device_destroy,
+                                 NULL);
+}
@@ -0,0 +1,68 @@
+/****************************************************************************
+ * drivers/syslog/syslog_rpmsg.h
+ * Syslog driver for rpmsg syslog
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __DRIVERS_SYSLOG_SYSLOG_RPMSG_H
+#define __DRIVERS_SYSLOG_SYSLOG_RPMSG_H
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#define SYSLOG_RPMSG_EPT_NAME           "rpmsg-syslog"
+
+#define SYSLOG_RPMSG_TRANSFER           0
+#define SYSLOG_RPMSG_TRANSFER_DONE      1
+#define SYSLOG_RPMSG_SUSPEND            2
+#define SYSLOG_RPMSG_RESUME             3
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+begin_packed_struct struct syslog_rpmsg_header_s
+{
+  uint32_t command;
+  int32_t  result;
+} end_packed_struct;
+
+begin_packed_struct struct syslog_rpmsg_transfer_s
+{
+  struct syslog_rpmsg_header_s header;
+  int32_t                      count;
+  char                         data[0];
+} end_packed_struct;
+
+#endif /* __DRIVERS_SYSLOG_SYSLOG_RPMSG_H */
@@ -0,0 +1,235 @@
+/****************************************************************************
+ * drivers/syslog/syslog_rpmsg_server.c
+ * Syslog driver for rpmsg syslog server
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 <nuttx/kmalloc.h>
+#include <nuttx/rptun/openamp.h>
+#include <nuttx/syslog/syslog.h>
+#include <nuttx/syslog/syslog_rpmsg.h>
+
+#include "syslog.h"
+#include "syslog_rpmsg.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define SYSLOG_RPMSG_MAXLEN             256
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct syslog_rpmsg_server_s
+{
+  struct rpmsg_endpoint ept;
+  FAR char              *tmpbuf;
+  unsigned int          nextpos;
+  unsigned int          alloced;
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static void syslog_rpmsg_write(FAR const char *buf1, size_t len1,
+                               FAR const char *buf2, size_t len2);
+static void syslog_rpmsg_ns_bind(FAR struct rpmsg_device *rdev,
+                                 FAR void *priv_, FAR const char *name,
+                                 uint32_t dest);
+static void syslog_rpmsg_ns_unbind(FAR struct rpmsg_endpoint *ept);
+static int  syslog_rpmsg_ept_cb(FAR struct rpmsg_endpoint *ept,
+                                FAR void *data, size_t len, uint32_t src,
+                                FAR void *priv_);
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void syslog_rpmsg_write(FAR const char *buf1, size_t len1,
+                               FAR const char *buf2, size_t len2)
+{
+  FAR const char *nl;
+  size_t len;
+
+  nl = memchr(buf2, '\n', len2);
+  DEBUGASSERT(nl != NULL);
+  len = nl + 1 - buf2;
+
+  if (len1 + len <= SYSLOG_RPMSG_MAXLEN)
+    {
+      char tmpbuf[SYSLOG_RPMSG_MAXLEN];
+
+      /* Ensure each syslog_write's buffer end with '\n' */
+
+      memcpy(tmpbuf, buf1, len1);
+      memcpy(tmpbuf + len1, buf2, len);
+      syslog_write(tmpbuf, len1 + len);
+
+      if (len < len2)
+        {
+          syslog_write(nl + 1, len2 - len);
+        }
+    }
+  else
+    {
+      /* Give up, the merge buffer is too big */
+
+      syslog_write(buf1, len1);
+      syslog_write(buf2, len2);
+    }
+}
+
+static void syslog_rpmsg_ns_bind(FAR struct rpmsg_device *rdev,
+                                 FAR void *priv_, FAR const char *name,
+                                 uint32_t dest)
+{
+  FAR struct syslog_rpmsg_server_s *priv;
+  int ret;
+
+  if (strcmp(name, SYSLOG_RPMSG_EPT_NAME))
+    {
+      return;
+    }
+
+  priv = kmm_zalloc(sizeof(struct syslog_rpmsg_server_s));
+  if (!priv)
+    {
+      return;
+    }
+
+  priv->ept.priv = priv;
+
+  ret = rpmsg_create_ept(&priv->ept, rdev, SYSLOG_RPMSG_EPT_NAME,
+                         RPMSG_ADDR_ANY, dest,
+                         syslog_rpmsg_ept_cb, syslog_rpmsg_ns_unbind);
+  if (ret)
+    {
+      kmm_free(priv);
+    }
+}
+
+static void syslog_rpmsg_ns_unbind(FAR struct rpmsg_endpoint *ept)
+{
+  FAR struct syslog_rpmsg_server_s *priv = ept->priv;
+
+  if (priv->nextpos)
+    {
+      syslog_rpmsg_write(priv->tmpbuf, priv->nextpos, "\n", 1);
+    }
+
+  rpmsg_destroy_ept(ept);
+
+  kmm_free(priv->tmpbuf);
+  kmm_free(priv);
+}
+
+static int syslog_rpmsg_ept_cb(FAR struct rpmsg_endpoint *ept, FAR void *data,
+                               size_t len, uint32_t src, FAR void *priv_)
+{
+  FAR struct syslog_rpmsg_server_s *priv = priv_;
+  FAR struct syslog_rpmsg_header_s *header = data;
+
+  if (header->command == SYSLOG_RPMSG_TRANSFER)
+    {
+      FAR struct syslog_rpmsg_transfer_s *msg = data;
+      struct syslog_rpmsg_header_s done;
+      unsigned int copied = msg->count;
+      unsigned int printed = 0;
+      FAR const char *nl;
+
+      nl = memrchr(msg->data, '\n', msg->count);
+      if (nl != NULL)
+        {
+          printed = nl + 1 - msg->data;
+          copied = msg->count - printed;
+
+          if (priv->nextpos)
+            {
+              syslog_rpmsg_write(priv->tmpbuf, priv->nextpos, msg->data, printed);
+              priv->nextpos = 0;
+            }
+          else
+            {
+              syslog_write(msg->data, printed);
+            }
+        }
+
+      if (copied != 0)
+        {
+          unsigned int newsize = priv->nextpos + copied;
+          if (newsize > priv->alloced)
+            {
+              char *newbuf = kmm_realloc(priv->tmpbuf, newsize);
+              if (newbuf != NULL)
+                {
+                  priv->tmpbuf  = newbuf;
+                  priv->alloced = newsize;
+                }
+              else
+                {
+                  copied = priv->alloced - priv->nextpos;
+                }
+            }
+
+          memcpy(priv->tmpbuf + priv->nextpos, msg->data + printed, copied);
+          priv->nextpos += copied;
+        }
+
+      done.command = SYSLOG_RPMSG_TRANSFER_DONE;
+      done.result  = printed + copied;
+      rpmsg_send(ept, &done, sizeof(done));
+    }
+
+  return 0;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int syslog_rpmsg_server_init(void)
+{
+  return rpmsg_register_callback(NULL,
+                                 NULL,
+                                 NULL,
+                                 syslog_rpmsg_ns_bind);
+}
@@ -279,6 +279,14 @@ config MCP794XX_I2C_FREQUENCY
 	range 1 400000

 endif # RTC_MCP794XX
+
+config RTC_RPMSG
+	bool "Rpmsg RTC Driver"
+	default n
+	depends on OPENAMP
+	depends on RTC_EXTERNAL
+	select ARCH_HAVE_RTC_SUBSECONDS
+
 endif # RTC

 menuconfig WATCHDOG
@@ -87,6 +87,12 @@ ifeq ($(CONFIG_RTC_MCP794XX),y)
  TMRVPATH = :timers
 endif

+ifeq ($(CONFIG_RTC_RPMSG),y)
+  CSRCS += rpmsg_rtc.c
+  TMRDEPPATH = --dep-path timers
+  TMRVPATH = :timers
+endif
+
 ifeq ($(CONFIG_RTC_ARCH),y)
  CSRCS += arch_rtc.c
  TMRDEPPATH = --dep-path timers
@@ -0,0 +1,427 @@
+/****************************************************************************
+ * drivers/timers/rpmsg_rtc.c
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li <liguiding@pinecone.net>
+ *
+ * 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 <nuttx/clock.h>
+#include <nuttx/kmalloc.h>
+#include <nuttx/rptun/openamp.h>
+#include <nuttx/semaphore.h>
+#include <nuttx/timers/rpmsg_rtc.h>
+
+#include <errno.h>
+#include <string.h>
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#define RPMSG_RTC_EPT_NAME          "rpmsg-rtc"
+
+#define RPMSG_RTC_SET               0
+#define RPMSG_RTC_GET               1
+#define RPMSG_RTC_ALARM_SET         2
+#define RPMSG_RTC_ALARM_CANCEL      3
+#define RPMSG_RTC_ALARM_FIRE        4
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+begin_packed_struct struct rpmsg_rtc_header_s
+{
+  uint32_t command;
+  int32_t  result;
+  uint64_t cookie;
+} end_packed_struct;
+
+begin_packed_struct struct rpmsg_rtc_set_s
+{
+  struct rpmsg_rtc_header_s header;
+  int64_t                   sec;
+  int32_t                   nsec;
+} end_packed_struct;
+
+#define rpmsg_rtc_get_s rpmsg_rtc_set_s
+
+begin_packed_struct struct rpmsg_rtc_alarm_set_s
+{
+  struct rpmsg_rtc_header_s header;
+  int64_t                   sec;
+  int32_t                   nsec;
+  int32_t                   id;
+} end_packed_struct;
+
+begin_packed_struct struct rpmsg_rtc_alarm_cancel_s
+{
+  struct rpmsg_rtc_header_s header;
+  int32_t                   id;
+} end_packed_struct;
+
+#define rpmsg_rtc_alarm_fire_s rpmsg_rtc_alarm_cancel_s
+
+struct rpmsg_rtc_cookie_s
+{
+  FAR struct rpmsg_rtc_header_s *msg;
+  sem_t                         sem;
+};
+
+/* This is the private type for the RTC state. It must be cast compatible
+ * with struct rtc_lowerhalf_s.
+ */
+
+struct rpmsg_rtc_lowerhalf_s
+{
+  /* This is the contained reference to the read-only, lower-half
+   * operations vtable (which may lie in FLASH or ROM)
+   */
+
+  FAR const struct rtc_ops_s *ops;
+
+  /* Data following is private to this driver and not visible outside of
+   * this file.
+   */
+
+  struct rpmsg_endpoint      ept;
+  FAR const char             *cpuname;
+
+#ifdef CONFIG_RTC_ALARM
+  struct lower_setalarm_s    alarminfo[CONFIG_RTC_NALARMS];
+#endif
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static void rpmsg_rtc_device_created(FAR struct rpmsg_device *rdev,
+                                     FAR void *priv);
+static void rpmsg_rtc_device_destroy(FAR struct rpmsg_device *rdev,
+                                     FAR void *priv);
+static void rpmsg_rtc_alarm_fire_handler(FAR struct rpmsg_endpoint *ept,
+                                         FAR void *data, size_t len,
+                                         uint32_t src, FAR void *priv);
+static int rpmsg_rtc_ept_cb(FAR struct rpmsg_endpoint *ept, FAR void *data,
+                            size_t len, uint32_t src, FAR void *priv);
+
+static int rpmsg_rtc_send_recv(FAR struct rpmsg_rtc_lowerhalf_s *lower,
+                               uint32_t command,
+                               FAR struct rpmsg_rtc_header_s *msg, int len);
+static int rpmsg_rtc_rdtime(FAR struct rtc_lowerhalf_s *lower,
+                            FAR struct rtc_time *rtctime);
+static int rpmsg_rtc_settime(FAR struct rtc_lowerhalf_s *lower,
+                             FAR const struct rtc_time *rtctime);
+static bool rpmsg_rtc_havesettime(FAR struct rtc_lowerhalf_s *lower);
+#ifdef CONFIG_RTC_ALARM
+static int rpmsg_rtc_setalarm(FAR struct rtc_lowerhalf_s *lower_,
+                              FAR const struct lower_setalarm_s *alarminfo);
+static int rpmsg_rtc_setrelative(FAR struct rtc_lowerhalf_s *lower,
+                                 FAR const struct lower_setrelative_s *relinfo);
+static int rpmsg_rtc_cancelalarm(FAR struct rtc_lowerhalf_s *lower,
+                                 int alarmid);
+static int rpmsg_rtc_rdalarm(FAR struct rtc_lowerhalf_s *lower_,
+                             FAR struct lower_rdalarm_s *alarminfo);
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const struct rtc_ops_s g_rpmsg_rtc_ops =
+{
+  .rdtime      = rpmsg_rtc_rdtime,
+  .settime     = rpmsg_rtc_settime,
+  .havesettime = rpmsg_rtc_havesettime,
+#ifdef CONFIG_RTC_ALARM
+  .setalarm    = rpmsg_rtc_setalarm,
+  .setrelative = rpmsg_rtc_setrelative,
+  .cancelalarm = rpmsg_rtc_cancelalarm,
+  .rdalarm     = rpmsg_rtc_rdalarm,
+#endif
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void rpmsg_rtc_device_created(FAR struct rpmsg_device *rdev,
+                                     FAR void *priv)
+{
+  FAR struct rpmsg_rtc_lowerhalf_s *lower = priv;
+
+  if (strcmp(lower->cpuname, rpmsg_get_cpuname(rdev)) == 0)
+    {
+      lower->ept.priv = lower;
+
+      rpmsg_create_ept(&lower->ept, rdev, RPMSG_RTC_EPT_NAME,
+                       RPMSG_ADDR_ANY, RPMSG_ADDR_ANY,
+                       rpmsg_rtc_ept_cb, NULL);
+    }
+}
+
+static void rpmsg_rtc_device_destroy(FAR struct rpmsg_device *rdev,
+                                     FAR void *priv)
+{
+  FAR struct rpmsg_rtc_lowerhalf_s *lower = priv;
+
+  if (strcmp(lower->cpuname, rpmsg_get_cpuname(rdev)) == 0)
+    {
+      rpmsg_destroy_ept(&lower->ept);
+    }
+}
+
+static void rpmsg_rtc_alarm_fire_handler(FAR struct rpmsg_endpoint *ept,
+                                         FAR void *data, size_t len,
+                                         uint32_t src, FAR void *priv)
+{
+#ifdef CONFIG_RTC_ALARM
+  FAR struct rpmsg_rtc_lowerhalf_s *lower = priv;
+  FAR struct rpmsg_rtc_alarm_fire_s *msg = data;
+  FAR struct lower_setalarm_s *alarminfo = &lower->alarminfo[msg->id];
+
+  alarminfo->cb(alarminfo->priv, alarminfo->id);
+#endif
+}
+
+static int rpmsg_rtc_ept_cb(FAR struct rpmsg_endpoint *ept, FAR void *data,
+                            size_t len, uint32_t src, FAR void *priv)
+{
+  FAR struct rpmsg_rtc_header_s *header = data;
+  FAR struct rpmsg_rtc_cookie_s *cookie =
+      (struct rpmsg_rtc_cookie_s *)(uintptr_t)header->cookie;
+
+  switch (header->command)
+    {
+    case RPMSG_RTC_ALARM_FIRE:
+      rpmsg_rtc_alarm_fire_handler(ept, data, len, src, priv);
+      break;
+
+    default:
+      if (cookie)
+        {
+          memcpy(cookie->msg, data, len);
+          nxsem_post(&cookie->sem);
+        }
+      break;
+    }
+
+  return 0;
+}
+
+static int rpmsg_rtc_send_recv(FAR struct rpmsg_rtc_lowerhalf_s *lower,
+                               uint32_t command,
+                               FAR struct rpmsg_rtc_header_s *msg, int len)
+{
+  FAR struct rpmsg_rtc_cookie_s cookie;
+  int ret;
+
+  nxsem_init(&cookie.sem, 0, 0);
+  nxsem_setprotocol(&cookie.sem, SEM_PRIO_NONE);
+  cookie.msg = msg;
+
+  msg->command = command;
+  msg->result  = -ENXIO;
+  msg->cookie  = (uintptr_t)&cookie;
+
+  ret = rpmsg_send(&lower->ept, msg, len);
+  if (ret < 0)
+    {
+      goto fail;
+    }
+
+  while (1)
+    {
+      ret = nxsem_wait(&cookie.sem);
+      if (ret != -EINTR)
+        {
+          if (ret == 0)
+            {
+              ret = msg->result;
+            }
+          break;
+        }
+    }
+
+fail:
+  nxsem_destroy(&cookie.sem);
+  return ret;
+}
+
+static int rpmsg_rtc_rdtime(FAR struct rtc_lowerhalf_s *lower,
+                            FAR struct rtc_time *rtctime)
+{
+  struct rpmsg_rtc_get_s msg;
+  int ret;
+
+  ret = rpmsg_rtc_send_recv((FAR struct rpmsg_rtc_lowerhalf_s *)lower,
+          RPMSG_RTC_GET, (struct rpmsg_rtc_header_s *)&msg, sizeof(msg));
+  if (ret >= 0)
+    {
+      time_t time = msg.sec;
+      gmtime_r(&time, (FAR struct tm *)rtctime);
+      rtctime->tm_nsec = msg.nsec;
+    }
+
+  return ret;
+}
+
+static int rpmsg_rtc_settime(FAR struct rtc_lowerhalf_s *lower,
+                             FAR const struct rtc_time *rtctime)
+{
+  struct rpmsg_rtc_set_s msg =
+  {
+    .sec  = mktime((FAR struct tm *)rtctime),
+    .nsec = rtctime->tm_nsec,
+  };
+
+  return rpmsg_rtc_send_recv((FAR struct rpmsg_rtc_lowerhalf_s *)lower,
+          RPMSG_RTC_SET, (struct rpmsg_rtc_header_s *)&msg, sizeof(msg));
+}
+
+static bool rpmsg_rtc_havesettime(FAR struct rtc_lowerhalf_s *lower)
+{
+  return true;
+}
+
+#ifdef CONFIG_RTC_ALARM
+static int rpmsg_rtc_setalarm(FAR struct rtc_lowerhalf_s *lower_,
+                              FAR const struct lower_setalarm_s *alarminfo)
+{
+  FAR struct rpmsg_rtc_lowerhalf_s *lower =
+    (FAR struct rpmsg_rtc_lowerhalf_s *)lower_;
+  struct rpmsg_rtc_alarm_set_s msg =
+  {
+    .sec  = mktime((FAR struct tm *)&alarminfo->time),
+    .nsec = alarminfo->time.tm_nsec,
+    .id   = alarminfo->id,
+  };
+
+  int ret;
+
+  ret = rpmsg_rtc_send_recv(lower, RPMSG_RTC_ALARM_SET,
+          (struct rpmsg_rtc_header_s *)&msg, sizeof(msg));
+  if (ret >= 0)
+    {
+      lower->alarminfo[alarminfo->id] = *alarminfo;
+    }
+
+  return ret;
+}
+
+static int rpmsg_rtc_setrelative(FAR struct rtc_lowerhalf_s *lower,
+                                 FAR const struct lower_setrelative_s *relinfo)
+{
+  struct lower_setalarm_s alarminfo =
+  {
+    .id   = relinfo->id,
+    .cb   = relinfo->cb,
+    .priv = relinfo->priv,
+  };
+
+  time_t time;
+
+  rpmsg_rtc_rdtime(lower, &alarminfo.time);
+  time = mktime((FAR struct tm *)&alarminfo.time);
+  time = time + relinfo->reltime;
+  gmtime_r(&time, (FAR struct tm *)&alarminfo.time);
+
+  return rpmsg_rtc_setalarm(lower, &alarminfo);
+}
+
+static int rpmsg_rtc_cancelalarm(FAR struct rtc_lowerhalf_s *lower,
+                                 int alarmid)
+{
+  struct rpmsg_rtc_alarm_cancel_s msg =
+  {
+    .id = alarmid,
+  };
+
+  return rpmsg_rtc_send_recv((FAR struct rpmsg_rtc_lowerhalf_s *)lower,
+          RPMSG_RTC_ALARM_CANCEL, (struct rpmsg_rtc_header_s *)&msg,
+          sizeof(msg));
+}
+
+static int rpmsg_rtc_rdalarm(FAR struct rtc_lowerhalf_s *lower_,
+                             FAR struct lower_rdalarm_s *alarminfo)
+{
+  FAR struct rpmsg_rtc_lowerhalf_s *lower =
+    (FAR struct rpmsg_rtc_lowerhalf_s *)lower_;
+
+  *alarminfo->time = lower->alarminfo[alarminfo->id].time;
+  return 0;
+}
+#endif
+
+/****************************************************************************
+ * Name: rpmsg_rtc_initialize
+ *
+ * Description:
+ *
+ *   Take remote core RTC as external RTC hardware through rpmsg.
+ *
+ * Input Parameters:
+ *   cpuname - current cpu name
+ *   minor  - device minor number
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno on failure
+ *
+ ****************************************************************************/
+
+FAR struct rtc_lowerhalf_s *rpmsg_rtc_initialize(FAR const char *cpuname,
+                                                 int minor)
+{
+  FAR struct rpmsg_rtc_lowerhalf_s *lower;
+
+  lower = kmm_zalloc(sizeof(*lower));
+  if (lower)
+    {
+      lower->ops     = &g_rpmsg_rtc_ops;
+      lower->cpuname = cpuname;
+
+      rpmsg_register_callback(lower,
+                              rpmsg_rtc_device_created,
+                              rpmsg_rtc_device_destroy,
+                              NULL);
+
+      rtc_initialize(minor, (FAR struct rtc_lowerhalf_s *)lower);
+    }
+
+  return (FAR struct rtc_lowerhalf_s *)lower;
+}
@@ -21,3 +21,19 @@ config FS_HOSTFS
 		be passed to the 'mount()' routine using the optional 'void *data'
 		parameter.

+config FS_HOSTFS_RPMSG
+	bool "Host File System Rpmsg"
+	default n
+	depends on FS_HOSTFS
+	depends on OPENAMP
+	---help---
+		Use Host file system to mount directories through rpmsg.
+		This is the driver that sending the message.
+
+config FS_HOSTFS_RPMSG_SERVER
+	bool "Host File System Rpmsg Server"
+	default n
+	depends on OPENAMP
+	---help---
+		Use Host file system to mount directories through rpmsg.
+		This is the driver that receiving the message.
@@ -33,16 +33,24 @@
 #
 ############################################################################

-ifeq ($(CONFIG_FS_HOSTFS),y)
-
 # Files required for HostFS file system support

 ASRCS +=
-CSRCS += hostfs.c
+CSRCS +=

 # Include HOSTFS build support

 DEPPATH += --dep-path hostfs
 VPATH += :hostfs

+ifeq ($(CONFIG_FS_HOSTFS),y)
+CSRCS += hostfs.c
+endif
+
+ifeq ($(CONFIG_FS_HOSTFS_RPMSG),y)
+CSRCS += hostfs_rpmsg.c
+endif
+
+ifeq ($(CONFIG_FS_HOSTFS_RPMSG_SERVER),y)
+CSRCS += hostfs_rpmsg_server.c
 endif
@@ -0,0 +1,201 @@
+/****************************************************************************
+ * fs/hostfs/hostfs_rpmsg.h
+ * Hostfs rpmsg driver header file
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __FS_HOSTFS_HOSTFS_RPMSG_H
+#define __FS_HOSTFS_HOSTFS_RPMSG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/stat.h>
+#include <sys/statfs.h>
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#ifndef ARRAY_SIZE
+#  define ARRAY_SIZE(x)             (sizeof(x) / sizeof((x)[0]))
+#endif
+
+#define HOSTFS_RPMSG_EPT_NAME       "rpmsg-hostfs"
+
+#define HOSTFS_RPMSG_OPEN           1
+#define HOSTFS_RPMSG_CLOSE          2
+#define HOSTFS_RPMSG_READ           3
+#define HOSTFS_RPMSG_WRITE          4
+#define HOSTFS_RPMSG_LSEEK          5
+#define HOSTFS_RPMSG_IOCTL          6
+#define HOSTFS_RPMSG_SYNC           7
+#define HOSTFS_RPMSG_DUP            8
+#define HOSTFS_RPMSG_FSTAT          9
+#define HOSTFS_RPMSG_FTRUNCATE      10
+#define HOSTFS_RPMSG_OPENDIR        11
+#define HOSTFS_RPMSG_READDIR        12
+#define HOSTFS_RPMSG_REWINDDIR      13
+#define HOSTFS_RPMSG_CLOSEDIR       14
+#define HOSTFS_RPMSG_STATFS         15
+#define HOSTFS_RPMSG_UNLINK         16
+#define HOSTFS_RPMSG_MKDIR          17
+#define HOSTFS_RPMSG_RMDIR          18
+#define HOSTFS_RPMSG_RENAME         19
+#define HOSTFS_RPMSG_STAT           20
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+begin_packed_struct struct hostfs_rpmsg_header_s
+{
+  uint32_t command;
+  int32_t  result;
+  uint64_t cookie;
+} end_packed_struct;
+
+begin_packed_struct struct hostfs_rpmsg_open_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      flags;
+  int32_t                      mode;
+  char                         pathname[0];
+} end_packed_struct;
+
+begin_packed_struct struct hostfs_rpmsg_close_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      fd;
+} end_packed_struct;
+
+begin_packed_struct struct hostfs_rpmsg_read_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      fd;
+  uint32_t                     count;
+  char                         buf[0];
+} end_packed_struct;
+
+#define hostfs_rpmsg_write_s hostfs_rpmsg_read_s
+
+begin_packed_struct struct hostfs_rpmsg_lseek_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      fd;
+  int32_t                      whence;
+  int32_t                      offset;
+} end_packed_struct;
+
+begin_packed_struct struct hostfs_rpmsg_ioctl_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      fd;
+  int32_t                      request;
+  int32_t                      arg;
+} end_packed_struct;
+
+#define hostfs_rpmsg_sync_s hostfs_rpmsg_close_s
+#define hostfs_rpmsg_dup_s  hostfs_rpmsg_close_s
+
+begin_packed_struct struct hostfs_rpmsg_fstat_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      fd;
+  uint32_t                     reserved;
+  struct stat                  buf;
+} end_packed_struct;
+
+begin_packed_struct struct hostfs_rpmsg_ftruncate_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      fd;
+  int32_t                      length;
+} end_packed_struct;
+
+begin_packed_struct struct hostfs_rpmsg_opendir_s
+{
+  struct hostfs_rpmsg_header_s header;
+  char                         pathname[0];
+} end_packed_struct;
+
+begin_packed_struct struct hostfs_rpmsg_readdir_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      fd;
+  uint32_t                     type;
+  char                         name[0];
+} end_packed_struct;
+
+#define hostfs_rpmsg_rewinddir_s hostfs_rpmsg_close_s
+#define hostfs_rpmsg_closedir_s hostfs_rpmsg_close_s
+
+begin_packed_struct struct hostfs_rpmsg_statfs_s
+{
+  struct hostfs_rpmsg_header_s header;
+  union
+  {
+    struct statfs              buf;
+    uint32_t                   reserved[16];
+  };
+
+  char                         pathname[0];
+} end_packed_struct;
+
+#define hostfs_rpmsg_unlink_s hostfs_rpmsg_opendir_s
+
+begin_packed_struct struct hostfs_rpmsg_mkdir_s
+{
+  struct hostfs_rpmsg_header_s header;
+  int32_t                      mode;
+  uint32_t                     reserved;
+  char                         pathname[0];
+} end_packed_struct;
+
+#define hostfs_rpmsg_rmdir_s hostfs_rpmsg_opendir_s
+#define hostfs_rpmsg_rename_s hostfs_rpmsg_opendir_s
+
+begin_packed_struct struct hostfs_rpmsg_stat_s
+{
+  struct hostfs_rpmsg_header_s header;
+  union
+  {
+    struct stat                buf;
+    uint32_t                   reserved[16];
+  };
+
+  char                         pathname[0];
+} end_packed_struct;
+
+#endif /* __FS_HOSTFS_HOSTFS_RPMSG_H */
@@ -9,3 +9,6 @@
 /uClibc++
 /libcxx
 /machine
+/openamp
+/metal
+
@@ -0,0 +1,124 @@
+/****************************************************************************
+ * include/nuttx/b2c.h
+ *
+ *   Copyright (C) 2019 Pinecone Inc. All rights reserved.
+ *   Author:  Xiang Xiao <xiaoxiang@xiaomi.com>
+ *
+ * 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 __INCLUDE_NUTTX_B2C_H
+#define __INCLUDE_NUTTX_B2C_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <string.h>
+#include <limits.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#if CHAR_BIT == 8
+#  define CHAR_BYTE  1
+#  define CHAR_SHIFT 0
+#elif CHAR_BIT == 16
+#  define CHAR_BYTE  2
+#  define CHAR_SHIFT 1
+#elif CHAR_BIT == 32
+#  define CHAR_BYTE  4
+#  define CHAR_SHIFT 2
+#else
+#  error unsupport CHAR_BIT value
+#endif
+
+/* Macros convert between chars and bytes */
+
+#define B2C(x) (((x) + CHAR_BYTE - 1) >> CHAR_SHIFT)
+#define C2B(x) ((x) << CHAR_SHIFT)
+
+#define B2C_OFF(x) ((x) >> CHAR_SHIFT)
+#define C2B_OFF(x) ((x) << CHAR_SHIFT)
+
+#define B2C_REM(x) ((x) - C2B_OFF(B2C_OFF(x)))
+
+#define B2C_SHIFT(x) ((x) - CHAR_SHIFT)
+#define C2B_SHIFT(x) ((x) + CHAR_SHIFT)
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+/* Functions convert between chars and bytes */
+
+#if CHAR_BIT != 8
+
+size_t bstrnlen(FAR const char *src, size_t maxlen);
+
+FAR char *ancstr2bstr(FAR const char *src, size_t maxlen);
+FAR char *anbstr2cstr(FAR const char *src, size_t maxlen);
+
+void ncstr2bstr(FAR char *dst, FAR const char *src, size_t maxlen);
+void nbstr2cstr(FAR char *dst, FAR const char *src, size_t maxlen);
+
+void cmem2bmem(FAR void *dst, size_t rem, FAR const void *src, size_t len);
+void bmem2cmem(FAR void *dst, FAR const void *src, size_t rem, size_t len);
+
+#  define cstr2bstr(dst, src) ncstr2bstr(dst, src, SIZE_MAX)
+#  define bstr2cstr(dst, src) nbstr2cstr(dst, src, SIZE_MAX)
+
+#else
+
+#  define bstrnlen(src, maxlen) strnlen(src, maxlen)
+
+#  define ancstr2bstr(src, maxlen) strndup(src, maxlen)
+#  define anbstr2cstr(src, maxlen) strndup(src, maxlen)
+
+#  define ncstr2bstr(dst, src, maxlen) strncpy(dst, src, maxlen)
+#  define nbstr2cstr(dst, src, maxlen) strncpy(dst, src, maxlen)
+
+#  define cmem2bmem(dst, rem, src, len) memcpy((FAR char *)(dst) + rem, src, len)
+#  define bmem2cmem(dst, src, rem, len) memcpy(dst, (FAR char *)(src) + rem, len)
+
+#  define cstr2bstr(dst, src) strcpy(dst, src)
+#  define bstr2cstr(dst, src) strcpy(dst, src)
+
+#endif
+
+#define bstrlen(src) bstrnlen(src, SIZE_MAX)
+
+#define acstr2bstr(src) ancstr2bstr(src, SIZE_MAX)
+#define abstr2cstr(src) anbstr2cstr(src, SIZE_MAX)
+
+#endif /* __INCLUDE_NUTTX_B2C_H */
@@ -0,0 +1,65 @@
+/****************************************************************************
+ * include/nuttx/fs/hostfs_rpmsg.h
+ * Hostfs rpmsg driver header file
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_FS_HOSTFS_H
+#define __INCLUDE_NUTTX_FS_HOSTFS_H
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+#ifdef CONFIG_FS_HOSTFS_RPMSG
+int hostfs_rpmsg_init(FAR const char *cpu_name);
+#endif
+
+#ifdef CONFIG_FS_HOSTFS_RPMSG_SERVER
+int hostfs_rpmsg_server_init(void);
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __INCLUDE_NUTTX_FS_HOSTFS_H */
@@ -96,6 +96,7 @@
 #define _FBIOCBASE      (0x2800) /* Frame buffer character driver ioctl commands */
 #define _NXTERMBASE     (0x2900) /* NxTerm character driver ioctl commands */
 #define _RFIOCBASE      (0x2a00) /* RF devices ioctl commands */
+#define _RPTUNBASE      (0x2b00) /* Remote processor tunnel ioctl commands */

 /* boardctl() commands share the same number space */

@@ -506,6 +507,11 @@
 #define _RFIOCVALID(c)    (_IOC_TYPE(c)==_RFIOCBASE)
 #define _RFIOC(nr)        _IOC(_RFIOCBASE,nr)

+/* Rptun drivers ************************************************************/
+
+#define _RPTUNIOCVALID(c)   (_IOC_TYPE(c)==_RPTUNBASE)
+#define _RPTUNIOC(nr)       _IOC(_RPTUNBASE,nr)
+
 /* boardctl() command definitions *******************************************/

 #define _BOARDIOCVALID(c) (_IOC_TYPE(c)==_BOARDBASE)
@@ -0,0 +1,146 @@
+/****************************************************************************
+ * include/nuttx/mbox/mbox.h
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_MBOX_MBOX_H
+#define __INCLUDE_NUTTX_MBOX_MBOX_H
+
+#ifdef CONFIG_MBOX
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <stdbool.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Access macros ************************************************************/
+
+/****************************************************************************
+ * Name: MBOX_SEND
+ *
+ * Description:
+ *   Send a 32bits message to remote core from specific channel
+ *
+ * Input Parameters:
+ *   dev   - Device-specific state data
+ *   ch    - Mbox specific channel
+ *   msg   - Message to send
+ *
+ * Returned Value:
+ *   OK unless an error occurs.  Then a negated errno value is returned
+ *
+ ****************************************************************************/
+
+#define MBOX_SEND(d,c,m) ((d)->ops->send(d,c,m))
+
+/****************************************************************************
+ * Name: MBOX_REGISTER_CALLBACK
+ *
+ * Description:
+ *   Attach to receive a callback when something is received on MBOX
+ *
+ * Input Parameters:
+ *   dev      - Device-specific state data
+ *   ch       - Mbox specific channel
+ *   callback - The function to be called when something has been received
+ *   arg      - A caller provided value to return with the callback
+ *
+ * Returned Value:
+ *   OK unless an error occurs.  Then a negated errno value is returned
+ *
+ ****************************************************************************/
+
+#define MBOX_REGISTER_CALLBACK(d,c,cb,a) \
+  ((d)->ops->registercallback(d,c,cb,a))
+
+/****************************************************************************
+ * Name: MBOX_UNREGISTER_CALLBACK
+ *
+ * Description:
+ *   Detach MBOX callback
+ *
+ * Input Parameters:
+ *   dev      - Device-specific state data
+ *   ch       - Mbox specific channel
+ *
+ * Returned Value:
+ *   OK unless an error occurs.  Then a negated errno value is returned
+ *
+ ****************************************************************************/
+
+#define MBOX_UNREGISTER_CALLBACK(d,c) \
+  ((d)->ops->registercallback(d,c,NULL,NULL))
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+struct mbox_dev_s;
+typedef CODE int (*mbox_receive_t)(FAR void *arg, uintptr_t msg);
+
+struct mbox_ops_s
+{
+  CODE int (*send)(FAR struct mbox_dev_s *dev, uint32_t ch, uintptr_t msg);
+  CODE int (*registercallback)(FAR struct mbox_dev_s *dev, uint32_t ch,
+                               mbox_receive_t callback, FAR void *arg);
+};
+
+struct mbox_dev_s
+{
+  FAR const struct mbox_ops_s *ops;
+};
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_MBOX */
+#endif /* __INCLUDE_NUTTX_MBOX_MBOX_H */
@@ -0,0 +1,116 @@
+/****************************************************************************
+ * include/nuttx/net/rpmsg.h
+ *
+ *   Copyright (C) 2018 Pinecone Inc. All rights reserved.
+ *   Author: Jianli Dong <dongjianli@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_NET_RPMSG_H
+#define __INCLUDE_NUTTX_NET_RPMSG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <stdint.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define NET_RPMSG_EPT_NAME              "rpmsg-%s"
+
+#define NET_RPMSG_IFUP                  0 /* IP-->LINK */
+#define NET_RPMSG_IFDOWN                1 /* IP-->LINK */
+#define NET_RPMSG_ADDMCAST              2 /* IP-->LINK */
+#define NET_RPMSG_RMMCAST               3 /* IP-->LINK */
+#define NET_RPMSG_DEVIOCTL              4 /* IP-->LINK */
+#define NET_RPMSG_SOCKIOCTL             5 /* IP<--LINK */
+#define NET_RPMSG_TRANSFER              6 /* IP<->LINK */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+begin_packed_struct struct net_rpmsg_lnkaddr_s
+{
+  uint32_t length;
+  uint8_t  addr[16];
+} end_packed_struct;
+
+begin_packed_struct struct net_rpmsg_header_s
+{
+  uint32_t command;
+  int32_t  result;
+  uint64_t cookie;
+} end_packed_struct;
+
+begin_packed_struct struct net_rpmsg_ifup_s
+{
+  struct net_rpmsg_header_s  header;
+  struct net_rpmsg_lnkaddr_s lnkaddr;
+
+  /* All addresses in the network order */
+
+  uint32_t                   ipaddr;
+  uint32_t                   draddr;
+  uint32_t                   netmask;
+  uint32_t                   dnsaddr;
+  uint16_t                   ipv6addr[8];
+  uint16_t                   ipv6draddr[8];
+  uint16_t                   ipv6netmask[8];
+  uint16_t                   ipv6dnsaddr[8];
+} end_packed_struct;
+
+#define net_rpmsg_ifdown_s net_rpmsg_header_s
+
+begin_packed_struct struct net_rpmsg_mcast_s
+{
+  struct net_rpmsg_header_s  header;
+  struct net_rpmsg_lnkaddr_s lnkaddr;
+} end_packed_struct;
+
+begin_packed_struct struct net_rpmsg_ioctl_s
+{
+  struct net_rpmsg_header_s header;
+  uint32_t                  code;
+  uint32_t                  length;
+  uint8_t                   arg[0];
+} end_packed_struct;
+
+begin_packed_struct struct net_rpmsg_transfer_s
+{
+  struct net_rpmsg_header_s header;
+  uint32_t                  length;
+  uint8_t                   data[0];
+} end_packed_struct;
+
+#endif /* __INCLUDE_NUTTX_NET_RPMSG_H */
@@ -0,0 +1,58 @@
+/****************************************************************************
+ * include/nuttx/net/rpmsgdrv.h
+ *
+ *   Copyright (C) 2018 Pinecone Inc. All rights reserved.
+ *   Author: Jianli Dong <dongjianli@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_NET_RPMSGDRV_H
+#define __INCLUDE_NUTTX_NET_RPMSGDRV_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/net/net.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_RPMSG_DRV
+int net_rpmsg_drv_init(FAR const char *cpuname,
+                       FAR const char *devname,
+                       enum net_lltype_e lltype);
+#else
+#define net_rpmsg_drv_init(cpuname, devname, lltye)
+#endif
+
+#endif /* __INCLUDE_NUTTX_NET_RPMSGDRV_H */
@@ -0,0 +1,86 @@
+/****************************************************************************
+ * include/nuttx/rptun/openamp.h
+ *
+ *   Copyright (C) 2019 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_RPTUN_OPENAMP_H
+#define __INCLUDE_NUTTX_RPTUN_OPENAMP_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <openamp/open_amp.h>
+#include <openamp/remoteproc_loader.h>
+
+#ifdef CONFIG_RPTUN
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+typedef void (*rpmsg_dev_cb_t)(FAR struct rpmsg_device *rdev,
+                               FAR void *priv);
+typedef void (*rpmsg_bind_cb_t)(FAR struct rpmsg_device *rdev,
+                                FAR void *priv, FAR const char *name,
+                                uint32_t dest);
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+const char *rpmsg_get_cpuname(FAR struct rpmsg_device *rdev);
+int rpmsg_register_callback(FAR void *priv,
+                            rpmsg_dev_cb_t device_created,
+                            rpmsg_dev_cb_t device_destroy,
+                            rpmsg_bind_cb_t ns_bind);
+void rpmsg_unregister_callback(FAR void *priv,
+                               rpmsg_dev_cb_t device_created,
+                               rpmsg_dev_cb_t device_destroy,
+                               rpmsg_bind_cb_t ns_bind);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_RPTUN */
+#endif /*__INCLUDE_NUTTX_RPTUN_OPENAMP_H */
@@ -0,0 +1,311 @@
+/****************************************************************************
+ * include/nuttx/rptun/rptun.h
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_RPTUN_RPTUN_H
+#define __INCLUDE_NUTTX_RPTUN_RPTUN_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/fs/ioctl.h>
+#include <openamp/open_amp.h>
+
+#include <string.h>
+
+#ifdef CONFIG_RPTUN
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define RPTUNIOC_START              _RPTUNIOC(1)
+#define RPTUNIOC_STOP               _RPTUNIOC(2)
+
+#define RPTUN_NOTIFY_ALL            (UINT32_MAX - 0)
+
+/* Access macros ************************************************************/
+
+/****************************************************************************
+ * Name: RPTUN_GET_CPUNAME
+ *
+ * Description:
+ *   Get remote cpu name
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *
+ * Returned Value:
+ *   Cpu name on success, NULL on failure.
+ *
+ ****************************************************************************/
+
+#define RPTUN_GET_CPUNAME(d) ((d)->ops->get_cpuname(d))
+
+/****************************************************************************
+ * Name: RPTUN_GET_FIRMWARE
+ *
+ * Description:
+ *   Get remote firmware name
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *
+ * Returned Value:
+ *   Firmware name on success, NULL on failure.
+ *
+ ****************************************************************************/
+
+#define RPTUN_GET_FIRMWARE(d) ((d)->ops->get_firmware(d))
+
+/****************************************************************************
+ * Name: RPTUN_GET_ADDRENV
+ *
+ * Description:
+ *   Get adress env list
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *
+ * Returned Value:
+ *   Addrenv pointer on success, NULL on failure.
+ *
+ ****************************************************************************/
+
+#define RPTUN_GET_ADDRENV(d) ((d)->ops->get_addrenv(d))
+
+/****************************************************************************
+ * Name: RPTUN_GET_RESOURCE
+ *
+ * Description:
+ *   Get rptun resouce
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *
+ * Returned Value:
+ *   Resource pointer on success, NULL on failure
+ *
+ ****************************************************************************/
+
+#define RPTUN_GET_RESOURCE(d) ((d)->ops->get_resource(d))
+
+/****************************************************************************
+ * Name: RPTUN_IS_AUTOSTART
+ *
+ * Description:
+ *   AUTO start or not
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *
+ * Returned Value:
+ *   True autostart, false not autostart
+ *
+ ****************************************************************************/
+
+#define RPTUN_IS_AUTOSTART(d) ((d)->ops->is_autostart(d))
+
+/****************************************************************************
+ * Name: RPTUN_IS_MASTER
+ *
+ * Description:
+ *   IS master or not
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *
+ * Returned Value:
+ *   True master, false remote
+ *
+ ****************************************************************************/
+
+#define RPTUN_IS_MASTER(d) ((d)->ops->is_master(d))
+
+/****************************************************************************
+ * Name: RPTUN_START
+ *
+ * Description:
+ *   START remote cpu
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *
+ * Returned Value:
+ *   OK unless an error occurs.  Then a negated errno value is returned
+ *
+ ****************************************************************************/
+
+#define RPTUN_START(d) ((d)->ops->start(d))
+
+/****************************************************************************
+ * Name: RPTUN_STOP
+ *
+ * Description:
+ *   STOP remote cpu
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *
+ * Returned Value:
+ *   OK unless an error occurs.  Then a negated errno value is returned
+ *
+ ****************************************************************************/
+
+#define RPTUN_STOP(d) ((d)->ops->stop(d))
+
+/****************************************************************************
+ * Name: RPTUN_NOTIFY
+ *
+ * Description:
+ *   Notify remote core there is a message to get.
+ *
+ * Input Parameters:
+ *   dev  - Device-specific state data
+ *   vqid - Message to notify
+ *
+ * Returned Value:
+ *   OK unless an error occurs.  Then a negated errno value is returned
+ *
+ ****************************************************************************/
+
+#define RPTUN_NOTIFY(d,v) ((d)->ops->notify(d,v))
+
+/****************************************************************************
+ * Name: RPTUN_REGISTER_CALLBACK
+ *
+ * Description:
+ *   Attach to receive a callback when something is received on RPTUN
+ *
+ * Input Parameters:
+ *   dev      - Device-specific state data
+ *   callback - The function to be called when something has been received
+ *   arg      - A caller provided value to return with the callback
+ *
+ * Returned Value:
+ *   OK unless an error occurs.  Then a negated errno value is returned
+ *
+ ****************************************************************************/
+
+#define RPTUN_REGISTER_CALLBACK(d,c,a) ((d)->ops->register_callback(d,c,a))
+
+/****************************************************************************
+ * Name: RPTUN_UNREGISTER_CALLBACK
+ *
+ * Description:
+ *   Detach RPTUN callback
+ *
+ * Input Parameters:
+ *   dev      - Device-specific state data
+ *
+ * Returned Value:
+ *   OK unless an error occurs.  Then a negated errno value is returned
+ *
+ ****************************************************************************/
+
+#define RPTUN_UNREGISTER_CALLBACK(d) ((d)->ops->register_callback(d,NULL,NULL))
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+typedef CODE int (*rptun_callback_t)(FAR void *arg, uint32_t vqid);
+
+struct rptun_addrenv_s
+{
+  uintptr_t pa;
+  uintptr_t da;
+  size_t    size;
+};
+
+struct __attribute__((aligned(B2C(8)))) rptun_rsc_s
+{
+  struct resource_table    rsc_tbl_hdr;
+  unsigned int             offset[2];
+  struct fw_rsc_trace      log_trace;
+  struct fw_rsc_vdev       rpmsg_vdev;
+  struct fw_rsc_vdev_vring rpmsg_vring0;
+  struct fw_rsc_vdev_vring rpmsg_vring1;
+  unsigned int             buf_size;
+};
+
+struct rptun_dev_s;
+struct rptun_ops_s
+{
+  CODE FAR const char *(*get_cpuname)(FAR struct rptun_dev_s *dev);
+  CODE FAR const char *(*get_firmware)(FAR struct rptun_dev_s *dev);
+
+  CODE FAR const struct rptun_addrenv_s *(*get_addrenv)(FAR struct rptun_dev_s *dev);
+  CODE FAR struct rptun_rsc_s *(*get_resource)(FAR struct rptun_dev_s *dev);
+
+  CODE bool (*is_autostart)(FAR struct rptun_dev_s *dev);
+  CODE bool (*is_master)(FAR struct rptun_dev_s *dev);
+
+  CODE int (*start)(FAR struct rptun_dev_s *dev);
+  CODE int (*stop)(FAR struct rptun_dev_s *dev);
+  CODE int (*notify)(FAR struct rptun_dev_s *dev, uint32_t vqid);
+  CODE int (*register_callback)(FAR struct rptun_dev_s *dev,
+                                rptun_callback_t callback, FAR void *arg);
+};
+
+struct rptun_dev_s
+{
+  FAR const struct rptun_ops_s *ops;
+};
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+int rptun_initialize(FAR struct rptun_dev_s *dev);
+int rptun_boot(FAR const char *cpuname);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_RPTUN */
+#endif /* __INCLUDE_NUTTX_RPTUN_RPTUN_H */
+
@@ -0,0 +1,71 @@
+/****************************************************************************
+ * include/nuttx/serial/uart_rpmsg.h
+ * Serial driver for rpmsg UART
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_SERIAL_UART_RPMSG_H
+#define __INCLUDE_NUTTX_SERIAL_UART_RPMSG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+
+#ifdef CONFIG_RPMSG_UART
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+int uart_rpmsg_init(FAR const char *cpu_name, FAR const char *dev_name,
+                    int buf_size, bool isconsole);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_RPMSG_UART */
+#endif /* __INCLUDE_NUTTX_SERIAL_UART_RPMSG_H */
@@ -0,0 +1,74 @@
+/****************************************************************************
+ * include/nuttx/syslog/syslog_rpmsg.h
+ * Syslog driver for rpmsg syslog
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_SYSLOG_SYSLOG_RPMSG_H
+#define __INCLUDE_NUTTX_SYSLOG_SYSLOG_RPMSG_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+#ifdef CONFIG_SYSLOG_RPMSG
+int syslog_rpmsg_init_early(FAR const char *cpu_name, FAR void *buffer,
+                            size_t size);
+int syslog_rpmsg_init(void);
+#endif
+
+#ifdef CONFIG_SYSLOG_RPMSG_SERVER
+int syslog_rpmsg_server_init(void);
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INCLUDE_NUTTX_SYSLOG_SYSLOG_RPMSG_H */
+
@@ -0,0 +1,70 @@
+/****************************************************************************
+ * include/nuttx/timers/rpmsg_rtc.h
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Guiding Li<liguiding@pinecone.net>
+ *
+ * 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 __INCLUDE_NUTTX_TIMERS_RPMSG_RTC_H
+#define __INCLUDE_NUTTX_TIMERS_RPMSG_RTC_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/timers/rtc.h>
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+#ifdef CONFIG_RTC_RPMSG
+
+FAR struct rtc_lowerhalf_s *rpmsg_rtc_initialize(FAR const char *cpu_name,
+                                                 int minor);
+
+#endif /* CONFIG_RTC_RPMSG */
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INCLUDE_NUTTX_TIMERS_RPMSG_RTC_H */
@@ -44,9 +44,7 @@

 #include <stddef.h>

-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
+#include <nuttx/b2c.h>

 /****************************************************************************
 * Public Function Prototypes
@@ -50,7 +50,7 @@ we have:
  semaphore - semaphore.h
  stdio     - stdio.h
  stdlib    - stdlib.h
-  string    - string.h (and legacy strings.h)
+  string    - string.h (and legacy strings.h and non-standard nuttx/b2c.h)
  time      - time.h
  uio       - sys/uio.h
  unistd    - unistd.h
@@ -0,0 +1,69 @@
+/****************************************************************************
+ * libc/stdlib/lib_anbstr2cstr.c
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * 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 <stdlib.h>
+#include <string.h>
+
+#include "libc.h"
+
+#if CHAR_BIT != 8
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+FAR char *anbstr2cstr(FAR const char *src, size_t maxlen)
+{
+  FAR char *dst;
+  size_t len;
+
+  len = bstrnlen(src, maxlen);
+  dst = lib_malloc(C2B(len + 1));
+  if (dst)
+    {
+      dst[C2B(len + 1) - 1] = 0;
+      bmem2cmem(dst, src, 0, len);
+    }
+
+  return dst;
+}
+
+#endif
@@ -0,0 +1,69 @@
+/****************************************************************************
+ * libc/stdlib/lib_ancstr2bstr.c
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * 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 <stdlib.h>
+#include <string.h>
+
+#include "libc.h"
+
+#if CHAR_BIT != 8
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+FAR char *ancstr2bstr(FAR const char *src, size_t maxlen)
+{
+  FAR char *dst;
+  size_t len;
+
+  len = strnlen(src, maxlen);
+  dst = lib_malloc(B2C(len + 1));
+  if (dst)
+    {
+      dst[B2C(len + 1) - 1] = 0;
+      cmem2bmem(dst, 0, src, len);
+    }
+
+  return dst;
+}
+
+#endif
@@ -0,0 +1,74 @@
+/****************************************************************************
+ * libc/stdlib/lib_bmem2cmem.c
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * 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 <stdlib.h>
+
+#if !defined(CONFIG_ENDIAN_BIG) && CHAR_BIT != 8
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void bmem2cmem(FAR void *dst_, FAR const void *src_, size_t rem, size_t len)
+{
+  char *dst = dst_;
+  const char *src = src_;
+
+  while (1)
+    {
+      int i;
+
+      for (i = 8 * rem; i < CHAR_BIT; i += 8)
+        {
+          if (len-- == 0)
+            {
+              return;
+            }
+
+          *dst++ = (*src >> i) & 0xff;
+        }
+
+      rem = 0;
+      src++;
+    }
+}
+
+#endif
@@ -0,0 +1,70 @@
+/****************************************************************************
+ * libc/stdlib/lib_bstrnlen.c
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * 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 <stdlib.h>
+
+#if !defined(CONFIG_ENDIAN_BIG) && CHAR_BIT != 8
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+size_t bstrnlen(FAR const char *src, size_t maxlen)
+{
+  size_t len = 0;
+
+  while (1)
+    {
+      int i;
+
+      for (i = 0; i < CHAR_BIT; i += 8, len++)
+        {
+          if (maxlen-- == 0 || ((*src >> i) & 0xff) == 0)
+            {
+              return len;
+            }
+        }
+
+      src++;
+    }
+}
+
+#endif
@@ -0,0 +1,78 @@
+/****************************************************************************
+ * libc/stdlib/lib_cmem2bmem.c
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * 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 <stdlib.h>
+
+#if !defined(CONFIG_ENDIAN_BIG) && CHAR_BIT != 8
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void cmem2bmem(FAR void *dst_, size_t rem, FAR const void *src_, size_t len)
+{
+  char *dst = dst_;
+  const char *src = src_;
+
+  while (1)
+    {
+      int i;
+
+      for (i = 8 * rem; i < CHAR_BIT; i += 8)
+        {
+          if (len-- == 0)
+            {
+              return;
+            }
+          else if (i == 8 * rem)
+            {
+              *dst = 0;
+            }
+
+          *dst |= (*src++ & 0xff) << i;
+        }
+
+      rem = 0;
+      dst++;
+    }
+}
+
+#endif
@@ -0,0 +1,74 @@
+/****************************************************************************
+ * libc/stdlib/lib_nbstr2cstr.c
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * 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 <stdlib.h>
+
+#if !defined(CONFIG_ENDIAN_BIG) && CHAR_BIT != 8
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void nbstr2cstr(FAR char *dst, FAR const char *src, size_t maxlen)
+{
+  while (1)
+    {
+      int i;
+
+      for (i = 0; i < CHAR_BIT; i += 8)
+        {
+          if (maxlen-- == 0)
+            {
+              return;
+            }
+
+          *dst = (*src >> i) & 0xff;
+          if (*dst++ == 0)
+            {
+              return;
+            }
+        }
+
+      src++;
+    }
+}
+
+#endif
@@ -0,0 +1,82 @@
+/****************************************************************************
+ * libc/stdlib/lib_ncstr2bstr.c
+ *
+ *   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+ *   Author: Xiang Xiao <xiaoxiang@pinecone.net>
+ *
+ * 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 <stdlib.h>
+
+#if !defined(CONFIG_ENDIAN_BIG) && CHAR_BIT != 8
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void ncstr2bstr(FAR char *dst, FAR const char *src, size_t maxlen)
+{
+  while (1)
+    {
+      int i;
+
+      for (i = 0; i < CHAR_BIT; i += 8)
+        {
+          char tmp;
+
+          if (maxlen-- == 0)
+            {
+              return;
+            }
+          else if (i == 0)
+            {
+              *dst = 0;
+            }
+
+          tmp = *src++ & 0xff;
+          if (tmp == 0)
+            {
+              return;
+            }
+
+          *dst |= tmp << i;
+        }
+
+      dst++;
+    }
+}
+
+#endif
@@ -0,0 +1,4 @@
+/.libmetal_headers
+/.openamp_headers
+/libmetal
+/open-amp
@@ -0,0 +1,14 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config OPENAMP
+	bool "Open Asymmetric Multi Processing support"
+	default n
+	---help---
+		Enable or disable Open Asymmetric Multi Processing features
+
+if OPENAMP
+
+endif # OPENAMP
@@ -0,0 +1,84 @@
+############################################################################
+# openamp/Makefile
+#
+#   Copyright (C) 2017 Pinecone Inc. All rights reserved.
+#   Author: Pinecone <pinecone@pinecone.net>
+#
+# 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
+
+ASRCS =
+CSRCS =
+
+VPATH := $(SRCDIR)
+DEPPATH = --dep-path .
+
+include libmetal/Make.defs
+include open-amp/Make.defs
+
+AOBJS = $(ASRCS:.S=$(OBJEXT))
+COBJS = $(CSRCS:.c=$(OBJEXT))
+
+SRCS = $(ASRCS) $(CSRCS)
+OBJS = $(AOBJS) $(COBJS)
+
+BIN = libopenamp$(LIBEXT)
+
+all: $(BIN)
+.PHONY: context depend clean distclean dirlinks
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+$(BIN): $(OBJS)
+	$(call ARCHIVE, $@, $(OBJS))
+
+dirlinks::
+
+.depend: Makefile $(SRCS)
+	$(Q) $(MKDEP) $(DEPPATH) "$(CC)" -- $(CFLAGS) -- $^ >Make.dep
+	$(Q) touch $@
+
+depend: .depend
+
+clean:
+	$(foreach obj,$(OBJS),$(call DELFILE, $(obj)))
+	$(call DELFILE, $(BIN))
+	$(call CLEAN)
+
+distclean:: clean
+	$(call DELFILE, Make.dep)
+	$(call DELFILE, .depend)
+
+-include Make.dep
@@ -166,4 +166,10 @@ else
 CLEANDIRS += crypto
 endif

+ifeq ($(CONFIG_OPENAMP),y)
+KERNDEPDIRS += openamp
+else
+CLEANDIRS += openamp
+endif
+
 CLEANDIRS += $(KERNDEPDIRS) $(USERDEPDIRS)
--- a/Show More
+++ b/Show More