15 files changed, 1319 insertions, 0 deletions
diff --git a/nuttx/mm/kmm_heap/kmm_addregion.c b/nuttx/mm/kmm_heap/kmm_addregion.c
new file mode 100644
index 000000000..da1068cee
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_addregion.c
@@ -0,0 +1,86 @@
+/************************************************************************
+ * mm/kmm_heap/kmm_addregion.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/************************************************************************
+ * Pre-processor definition
+ ************************************************************************/
+
+/************************************************************************
+ * Private Types
+ ************************************************************************/
+
+/************************************************************************
+ * Public Data
+ ************************************************************************/
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: kmm_addregion
+ *
+ * Description:
+ *   This function adds a region of contiguous memory to the kernel heap.
+ *
+ * Parameters:
+ *   heap_start - Address of the beginning of the memory region
+ *   heap_size  - The size (in bytes) if the memory region.
+ *
+ * Return Value:
+ *   None
+ *
+ ************************************************************************/
+
+void kmm_addregion(FAR void *heap_start, size_t heap_size)
+{
+  return mm_addregion(&g_kmmheap, heap_start, heap_size);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_brkaddr.c b/nuttx/mm/kmm_heap/kmm_brkaddr.c
new file mode 100644
index 000000000..34c8855df
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_brkaddr.c
@@ -0,0 +1,69 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_breakaddr.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <assert.h>
+
+#include <nuttx/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kmm_brkaddr
+ *
+ * Description:
+ *   Return the break address of a region in the user heap
+ *
+ ****************************************************************************/
+
+FAR void *kmm_brkaddr(int region)
+{
+  return mm_brkaddr(&g_kmmheap, region);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_calloc.c b/nuttx/mm/kmm_heap/kmm_calloc.c
new file mode 100644
index 000000000..070ed568c
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_calloc.c
@@ -0,0 +1,67 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_calloc.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kmm_calloc
+ *
+ * Description:
+ *   kmm_calloc is a thin wrapper for mm_calloc()
+ *
+ ****************************************************************************/
+
+FAR void *kmm_calloc(size_t n, size_t elem_size)
+{
+  return mm_calloc(&g_kmmheap, n, elem_size);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_extend.c b/nuttx/mm/kmm_heap/kmm_extend.c
new file mode 100644
index 000000000..e0a6c701f
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_extend.c
@@ -0,0 +1,68 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_extend.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kmm_extend
+ *
+ * Description:
+ *   Extend a region in the kernel heap by add a block of (virtually)
+ *   contiguous memory to the end of the heap.
+ *
+ ****************************************************************************/
+
+void kmm_extend(FAR void *mem, size_t size, int region)
+{
+  mm_extend(&g_kmmheap, mem, size, region);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_free.c b/nuttx/mm/kmm_heap/kmm_free.c
new file mode 100644
index 000000000..15b9f8ac4
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_free.c
@@ -0,0 +1,82 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_free.c
+ *
+ *   Copyright (C) 2007, 2009, 2013-2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <assert.h>
+#include <debug.h>
+
+#include <nuttx/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/************************************************************************
+ * Name: kmm_free
+ *
+ * Description:
+ *   Returns a chunk of kernel memory to the list of free nodes, merging
+ *   with adjacent free chunks if possible.
+ *
+ * Parameters:
+ *   None
+ *
+ * Return Value:
+ *   None
+ *
+ ************************************************************************/
+
+void kmm_free(FAR void *mem)
+{
+  DEBUGASSERT(kmm_heapmember(mem));
+  mm_free(&g_kmmheap, mem);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_heapmember.c b/nuttx/mm/kmm_heap/kmm_heapmember.c
new file mode 100644
index 000000000..2a1ca7c00
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_heapmember.c
@@ -0,0 +1,124 @@
+/************************************************************************
+ * mm/kmm_heap/kmm_heapmember.c
+ *
+ *   Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <stdbool.h>
+
+#include <nuttx/mm.h>
+
+#if defined(CONFIG_MM_KERNEL_HEAP) && defined(CONFIG_DEBUG)
+
+/************************************************************************
+ * Pre-processor definition
+ ************************************************************************/
+
+/************************************************************************
+ * Private Types
+ ************************************************************************/
+
+/************************************************************************
+ * Public Data
+ ************************************************************************/
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: kmm_heapmember
+ *
+ * Description:
+ *   Check if an address lies in the kernel heap.
+ *
+ * Parameters:
+ *   mem - The address to check
+ *
+ * Return Value:
+ *   true if the address is a member of the kernel heap.  false if not
+ *   not.  If the address is not a member of the kernel heap, then it
+ *   must be a member of the user-space heap (unchecked)
+ *
+ ************************************************************************/
+
+bool kmm_heapmember(FAR void *mem)
+{
+#if CONFIG_MM_REGIONS > 1
+  int i;
+
+  /* A valid address from the kernel heap for this region would have to lie
+   * between the region's two guard nodes.
+   */
+
+  for (i = 0; i < g_kmmheap.mm_nregions; i++)
+    {
+      if (mem > (FAR void *)g_kmmheap.mm_heapstart[i] &&
+          mem < (FAR void *)g_kmmheap.mm_heapend[i])
+        {
+          return true;
+        }
+    }
+
+  /* The address does not like any any region assigned to kernel heap */
+
+  return false;
+
+#else
+  /* A valid address from the kernel heap would have to lie between the
+   * two guard nodes.
+   */
+
+  if (mem > (FAR void *)g_kmmheap.mm_heapstart[0] &&
+      mem < (FAR void *)g_kmmheap.mm_heapend[0])
+    {
+      return true;
+    }
+
+  /* Otherwise, the address does not lie in the kernel heap */
+
+  return false;
+
+#endif
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP && CONFIG_DEBUG */
diff --git a/nuttx/mm/kmm_heap/kmm_initialize.c b/nuttx/mm/kmm_heap/kmm_initialize.c
new file mode 100644
index 000000000..deeb0e25f
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_initialize.c
@@ -0,0 +1,91 @@
+/************************************************************************
+ * mm/kmm_heap/kmm_initialize.c
+ *
+ *   Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/************************************************************************
+ * Pre-processor definition
+ ************************************************************************/
+
+/************************************************************************
+ * Private Types
+ ************************************************************************/
+
+/************************************************************************
+ * Public Data
+ ************************************************************************/
+
+/* This is the kernel heap */
+
+struct mm_heap_s g_kmmheap;
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: kmm_initialize
+ *
+ * Description:
+ *   Initialize the kernel heap data structures, providing the initial
+ *   heap region.
+ *
+ * Parameters:
+ *   heap_start - Address of the beginning of the (initial) memory region
+ *   heap_size  - The size (in bytes) if the (initial) memory region.
+ *
+ * Return Value:
+ *   None
+ *
+ ************************************************************************/
+
+void kmm_initialize(FAR void *heap_start, size_t heap_size)
+{
+  return mm_initialize(&g_kmmheap, heap_start, heap_size);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_kernel.c b/nuttx/mm/kmm_heap/kmm_kernel.c
new file mode 100644
index 000000000..4ab8e1b2b
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_kernel.c
@@ -0,0 +1,127 @@
+/************************************************************************
+ * mm/kmm_heap/kmm_kernel.c
+ *
+ *   Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <assert.h>
+
+#include <nuttx/kmalloc.h>
+
+#if ((defined(CONFIG_BUILD_PROTECTED) && defined(__KERNEL__)) || \
+      defined(CONFIG_BUILD_KERNEL)) && defined(CONFIG_MM_KERNEL_HEAP)
+
+/************************************************************************
+ * Pre-processor definition
+ ************************************************************************/
+
+/************************************************************************
+ * Private Types
+ ************************************************************************/
+
+/************************************************************************
+ * Public Data
+ ************************************************************************/
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: kmm_heapmember
+ *
+ * Description:
+ *   Check if an address lies in the kernel heap.
+ *
+ * Parameters:
+ *   mem - The address to check
+ *
+ * Return Value:
+ *   true if the address is a member of the kernel heap.  false if not
+ *   not.  If the address is not a member of the kernel heap, then it
+ *   must be a member of the user-space heap (unchecked)
+ *
+ ************************************************************************/
+
+#ifdef CONFIG_DEBUG
+bool kmm_heapmember(FAR void *mem)
+{
+#if CONFIG_MM_REGIONS > 1
+  int i;
+
+  /* A valid address from the kernel heap for this region would have to lie
+   * between the region's two guard nodes.
+   */
+
+  for (i = 0; i < g_kmmheap.mm_nregions; i++)
+    {
+      if (mem > (FAR void *)g_kmmheap.mm_heapstart[i] &&
+          mem < (FAR void *)g_kmmheap.mm_heapend[i])
+        {
+          return true;
+        }
+    }
+
+  /* The address does not like any any region assigned to kernel heap */
+
+  return false;
+
+#else
+  /* A valid address from the kernel heap would have to lie between the
+   * two guard nodes.
+   */
+
+  if (mem > (FAR void *)g_kmmheap.mm_heapstart[0] &&
+      mem < (FAR void *)g_kmmheap.mm_heapend[0])
+    {
+      return true;
+    }
+
+  /* Otherwise, the address does not lie in the kernel heap */
+
+  return false;
+
+#endif
+}
+#endif
+
+#endif /* ((CONFIG_BUILD_PROTECTED && __KERNEL__) || CONFIG_BUILD_KERNEL)  && CONFIG_MM_KERNEL_HEAP*/
diff --git a/nuttx/mm/kmm_heap/kmm_mallinfo.c b/nuttx/mm/kmm_heap/kmm_mallinfo.c
new file mode 100644
index 000000000..8a0ddf0e8
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_mallinfo.c
@@ -0,0 +1,90 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_mallinfo.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <nuttx/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kmm_mallinfo
+ *
+ * Description:
+ *   kmm_mallinfo returns a copy of updated current heap information for the
+ *   kernel heap
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_CAN_PASS_STRUCTS
+
+struct mallinfo kmm_mallinfo(void)
+{
+  struct mallinfo info;
+  mm_mallinfo(&g_kmmheap, &info);
+  return info;
+}
+
+#else
+
+int kmm_mallinfo(struct mallinfo *info)
+{
+  return mm_mallinfo(&g_kmmheap, info);
+}
+
+#endif /* CONFIG_CAN_PASS_STRUCTS */
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_malloc.c b/nuttx/mm/kmm_heap/kmm_malloc.c
new file mode 100644
index 000000000..22b5d4894
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_malloc.c
@@ -0,0 +1,89 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_malloc.c
+ *
+ *   Copyright (C) 2014  Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Type Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/************************************************************************
+ * Name: kmm_malloc
+ *
+ * Description:
+ *   Allocate memory from the kernel heap.
+ *
+ * Parameters:
+ *   size - Size (in bytes) of the memory region to be allocated.
+ *
+ * Return Value:
+ *   The address of the allocated memory (NULL on failure to allocate)
+ *
+ ************************************************************************/
+
+FAR void *kmm_malloc(size_t size)
+{
+  return mm_malloc(&g_kmmheap, size);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_memalign.c b/nuttx/mm/kmm_heap/kmm_memalign.c
new file mode 100644
index 000000000..b74c40866
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_memalign.c
@@ -0,0 +1,80 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_memalign.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <nuttx/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/************************************************************************
+ * Name: kmm_memalign
+ *
+ * Description:
+ *   Allocate aligned memory in the kernel heap.
+ *
+ * Parameters:
+ *   alignment - Log2 byte alignment
+ *   size - Size (in bytes) of the new memory region to be allocated.
+ *
+ * Return Value:
+ *   The address of the re-allocated memory (NULL on failure to allocate)
+ *
+ ************************************************************************/
+
+FAR void *kmm_memalign(size_t alignment, size_t size)
+{
+  return mm_memalign(&g_kmmheap, alignment, size);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_realloc.c b/nuttx/mm/kmm_heap/kmm_realloc.c
new file mode 100644
index 000000000..f41e69182
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_realloc.c
@@ -0,0 +1,78 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_realloc.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kmm_realloc
+ *
+ * Description:
+ *   Re-allocate memory in the kernel heap.
+ *
+ * Parameters:
+ *   oldmem  - The old memory allocated
+ *   newsize - Size (in bytes) of the new memory region to be re-allocated.
+ *
+ * Return Value:
+ *   The address of the re-allocated memory (NULL on failure to re-allocate)
+ *
+ ****************************************************************************/
+
+FAR void *kmm_realloc(FAR void *oldmem, size_t newsize)
+{
+  return mm_realloc(&g_kmmheap, oldmem, newsize);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_sbrk.c b/nuttx/mm/kmm_heap/kmm_sbrk.c
new file mode 100755
index 000000000..59dd810e9
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_sbrk.c
@@ -0,0 +1,91 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_sbrk.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#if defined(CONFIG_BUILD_KERNEL) && defined(__KERNEL__)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kmm_sbrk
+ *
+ * Description:
+ *    The sbrk() function is used to change the amount of space allocated
+ *    for the calling process. The change is made by resetting the process'
+ *    break value and allocating the appropriate amount of space.  The amount
+ *    of allocated space increases as the break value increases.
+ *
+ *    The sbrk() function adds 'incr' bytes to the break value and changes
+ *    the allocated space accordingly. If incr is negative, the amount of
+ *    allocated space is decreased by incr bytes. The current value of the
+ *    program break is returned by sbrk(0). 
+ *
+ * Input Parameters:
+ *    incr - Specifies the number of bytes to add or to remove from the
+ *      space allocated for the process.
+ *
+ * Returned Value:
+ *    Upon successful completion, sbrk() returns the prior break value.
+ *    Otherwise, it returns (void *)-1 and sets errno to indicate the
+ *    error:
+ *
+ *      ENOMEM - The requested change would allocate more space than
+ *        allowed under system limits.
+ *      EAGAIN - The total amount of system memory available for allocation
+ *        to this process is temporarily insufficient. This may occur even
+ *        though the space requested was less than the maximum data segment
+ *        size.
+ *
+ ****************************************************************************/
+
+FAR void *kmm_sbrk(intptr_t incr)
+{
+  return mm_sbrk(&g_kmmheap, incr, UINTPTR_MAX);
+}
+
+#endif /* CONFIG_BUILD_KERNEL && __KERNEL__ */
diff --git a/nuttx/mm/kmm_heap/kmm_sem.c b/nuttx/mm/kmm_heap/kmm_sem.c
new file mode 100644
index 000000000..3a274bc04
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_sem.c
@@ -0,0 +1,104 @@
+/************************************************************************
+ * mm/kmm_heap/kmm_sem.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/************************************************************************
+ * Pre-processor definition
+ ************************************************************************/
+
+/************************************************************************
+ * Private Types
+ ************************************************************************/
+
+/************************************************************************
+ * Public Data
+ ************************************************************************/
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: kmm_trysemaphore
+ *
+ * Description:
+ *   Try to take the kernel heap semaphore.
+ *
+ * Parameters:
+ *   None
+ *
+ * Return Value:
+ *   OK on success; a negated errno on failure
+ *
+ ************************************************************************/
+
+int kmm_trysemaphore(void)
+{
+  return mm_trysemaphore(&g_kmmheap);
+}
+
+/************************************************************************
+ * Name: kmm_givesemaphore
+ *
+ * Description:
+ *   Give the kernel heap semaphore.
+ *
+ * Parameters:
+ *   None
+ *
+ * Return Value:
+ *   OK on success; a negated errno on failure
+ *
+ ************************************************************************/
+
+void kmm_givesemaphore(void)
+{
+  return mm_givesemaphore(&g_kmmheap);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */
diff --git a/nuttx/mm/kmm_heap/kmm_zalloc.c b/nuttx/mm/kmm_heap/kmm_zalloc.c
new file mode 100644
index 000000000..af70afe9c
--- /dev/null
+++ b/nuttx/mm/kmm_heap/kmm_zalloc.c
@@ -0,0 +1,73 @@
+/****************************************************************************
+ * mm/kmm_heap/kmm_zalloc.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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/mm.h>
+
+#ifdef CONFIG_MM_KERNEL_HEAP
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/************************************************************************
+ * Name: kmm_zalloc
+ *
+ * Description:
+ *   Allocate and zero memory from the kernel heap.
+ *
+ * Parameters:
+ *   size - Size (in bytes) of the memory region to be allocated.
+ *
+ * Return Value:
+ *   The address of the allocated memory (NULL on failure to allocate)
+ *
+ ************************************************************************/
+
+FAR void *kmm_zalloc(size_t size)
+{
+  return mm_zalloc(&g_kmmheap, size);
+}
+
+#endif /* CONFIG_MM_KERNEL_HEAP */