From dcdfd99a0843a7db7dbb93b231f570e61e75aa97 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 24 Sep 2014 07:39:06 -0600
Subject: [PATCH] Build support for platform-specific shared memory logic.  Not
 logic yet in place

---
 arch/arm/src/armv7-a/arm_addrenv_shm.c | 113 +++++++++++++++++++++++++
 arch/arm/src/sama5/Make.defs           |   1 -
 2 files changed, 113 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/src/armv7-a/arm_addrenv_shm.c

diff --git a/arch/arm/src/armv7-a/arm_addrenv_shm.c b/arch/arm/src/armv7-a/arm_addrenv_shm.c
new file mode 100644
index 0000000000..1269fa2341
--- /dev/null
+++ b/arch/arm/src/armv7-a/arm_addrenv_shm.c
@@ -0,0 +1,113 @@
+/****************************************************************************
+ * arch/arm/src/armv7/arm_addrenv_shm.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 <stdint.h>
+#include <errno.h>
+
+#include <nuttx/arch.h>
+
+#if defined(CONFIG_BUILD_KERNEL) && defined(CONFIG_MM_SHM)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: up_shmat
+ *
+ * Description:
+ *   Attach, i.e, map, on shared memory region to a user virtual address
+ *
+ * Input Parameters:
+ *   pages - A pointer to the first element in a array of physical address,
+ *     each corresponding to one page of memory.
+ *   npages - The number of pages in the list of physical pages to be mapped.
+ *   vaddr - The virtual address corresponding to the beginning of the
+ *     (contiguous) virtual address region.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; a negated errno value is returned
+ *   on failure.
+ *
+ ****************************************************************************/
+
+int up_shmat(FAR uintptr_t *pages, unsigned int npages, uintptr_t vaddr)
+{
+#warning Missing logic
+  return -ENOSYS;
+}
+
+/****************************************************************************
+ * Name: up_shmdt
+ *
+ * Description:
+ *   Detach, i.e, unmap, on shared memory region from a user virtual address
+ *
+ * Input Parameters:
+ *   vaddr - The virtual address corresponding to the beginning of the
+ *     (contiguous) virtual address region.
+ *   npages - The number of pages to be unmapped
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; a negated errno value is returned
+ *   on failure.
+ *
+ ****************************************************************************/
+
+int up_shmdt(uintptr_t vaddr, unsigned int npages)
+{
+#warning Missing logic
+  return -ENOSYS;
+}
+
+#endif /* CONFIG_BUILD_KERNEL && CONFIG_MM_SHM */
diff --git a/arch/arm/src/sama5/Make.defs b/arch/arm/src/sama5/Make.defs
index 9b1c192c2c..25e87389ed 100644
--- a/arch/arm/src/sama5/Make.defs
+++ b/arch/arm/src/sama5/Make.defs
@@ -1,5 +1,4 @@
 ############################################################################
-############################################################################
 # arch/arm/sama5/Make.defs
 #
 #   Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.