1 files changed, 119 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_userspace.c b/nuttx/arch/arm/src/lpc17xx/lpc17_userspace.c
new file mode 100644
index 000000000..ffc935af3
--- /dev/null
+++ b/nuttx/arch/arm/src/lpc17xx/lpc17_userspace.c
@@ -0,0 +1,119 @@
+/****************************************************************************
+ * arch/arm/src/lpc17xx/lpc17_userspace.c
+ *
+ *   Copyright (C) 2013 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 <assert.h>
+
+#include <nuttx/userspace.h>
+
+#include "lpc17_mpuinit.h"
+#include "lpc17_userspace.h"
+
+#ifdef CONFIG_NUTTX_KERNEL
+
+/****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: lpc17_userspace
+ *
+ * Description:
+ *   For the case of the separate user-/kernel-space build, perform whatever
+ *   platform specific initialization of the user memory is required.
+ *   Normally this just means initializing the user space .data and .bss
+ *   segments.
+ *
+ ****************************************************************************/
+
+void lpc17_userspace(void)
+{
+  uint8_t *src;
+  uint8_t *dest;
+  uint8_t *end;
+
+  /* Clear all of user-space .bss */
+
+  DEBUGASSERT(USERSPACE->us_bssstart != 0 && USERSPACE->us_bssend != 0 &&
+              USERSPACE->us_bssstart <= USERSPACE->us_bssend);
+
+  dest = (uint8_t*)USERSPACE->us_bssstart;
+  end  = (uint8_t*)USERSPACE->us_bssend;
+
+  while (dest != end)
+    {
+      *dest++ = 0;
+    }
+
+  /* Initialize all of user-space .data */
+
+  DEBUGASSERT(USERSPACE->us_datasource != 0 &&
+              USERSPACE->us_datastart != 0 && USERSPACE->us_dataend != 0 && 
+              USERSPACE->us_datastart <= USERSPACE->us_dataend);
+
+  src  = (uint8_t*)USERSPACE->us_datasource;
+  dest = (uint8_t*)USERSPACE->us_datastart;
+  end  = (uint8_t*)USERSPACE->us_dataend;
+
+  while (dest != end)
+    {
+      *dest++ = *src++;
+    }
+
+  /* Configure the MPU to permit user-space access to its FLASH and RAM */
+
+  lpc17_mpuinitialize();
+}
+
+#endif /* CONFIG_NUTTX_KERNEL */
+