Add logic to initialize SAM3U user applications

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3482 42af7a65-404d-4744-a932-0658087f49c3

arch/arm/src/sam3u/Make.defs

@@ -57,6 +57,10 @@ CHIP_CSRCS	= sam3u_allocateheap.c sam3u_clockconfig.c sam3u_gpioirq.c \
 
 # Configuration-dependent SAM3U files
 
+ifeq ($(CONFIG_NUTTX_KERNEL),y)
+CHIP_CSRCS	+= sam3u_userspace.c sam3u_mpuinit.c
+endif
+
 ifeq ($(CONFIG_SAM3U_DMA),y)
 CHIP_CSRCS	+= sam3u_dmac.c
 endif
@@ -64,3 +68,4 @@ endif
 ifeq ($(CONFIG_SAM3U_HSMCI),y)
 CHIP_CSRCS	+= sam3u_hsmci.c
 endif
+

arch/arm/src/sam3u/sam3u_internal.h

@@ -1,7 +1,7 @@
 /************************************************************************************
  * arch/arm/src/sam3u/sam3u_internal.h
  *
- *   Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009-2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -437,6 +437,34 @@ EXTERN void sam3u_clockconfig(void);
 
 EXTERN void sam3u_lowsetup(void);
 
+/****************************************************************************
+ * Name: sam3u_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
+ *   segements.
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_NUTTX_KERNEL
+EXTERN void sam3u_userspace(void);
+#endif
+
+/****************************************************************************
+ * Name: sam3u_mpuinitialize
+ *
+ * Description:
+ *   Configure the MPU to permit user-space access to only restricted SAM3U
+ *   resources.
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_NUTTX_KERNEL
+EXTERN void sam3u_mpuinitialize(void);
+#endif
+
 /************************************************************************************
  * Name: sam3u_gpioirqinitialize
  *

arch/arm/src/sam3u/sam3u_mpuinit.c

@@ -0,0 +1,76 @@
+/****************************************************************************
+ * arch/arm/src/common/sam3u_mpuinit.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <arch/board/user_map.h>
+
+#ifndef CONFIG_NUTTX_KERNEL
+
+/****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam3u_mpuinitialize
+ *
+ * Description:
+ *   Configure the MPU to permit user-space access to only restricted SAM3U
+ *   resources.
+ *
+ ****************************************************************************/
+
+void sam3u_mpuinitialize(void)
+{
+# warning "Not implemented"
+}
+
+#endif /* CONFIG_NUTTX_KERNEL */
+

arch/arm/src/sam3u/sam3u_start.c

@@ -134,6 +134,16 @@ void __start(void)
 #endif
   showprogress('D');
 
+  /* 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
+   * segements.
+   */
+
+#ifndef CONFIG_NUTTX_KERNEL
+  sam3u_userspace();
+#endif
+
   /* Initialize onboard resources */
 
   sam3u_boardinitialize();

arch/arm/src/sam3u/sam3u_userspace.c

@@ -0,0 +1,105 @@
+/****************************************************************************
+ * arch/arm/src/common/sam3u_userspace.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <arch/board/user_map.h>
+
+#ifndef CONFIG_NUTTX_KERNEL
+
+/****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sam3u_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
+ *   segements.
+ *
+ ****************************************************************************/
+
+void sam3u_userspace(void)
+{
+  uint8_t *src;
+  uint8_t *dest;
+  uint8_t *end;
+
+  /* Clear all of user-space .bss */
+
+  DEBUGASSERT((uintptr_t)CONFIG_USER_DATADESTSTART <= CONFIG_USER_DATADESTEND);
+
+  dest = (uint8_t*)CONFIG_USER_BSSSTART;
+  end  = (uint8_t*)CONFIG_USER_BSSEND;
+
+  while (dest != end)
+    {
+      *dest++ = 0;
+    }
+
+  /* Initialize all of user-space .data */
+
+  DEBUGASSERT((uintptr_t)CONFIG_USER_DATADESTSTART <= CONFIG_USER_DATADESTEND);
+
+  src  = (uint8_t*)CONFIG_USER_DATASOURCE;
+  dest = (uint8_t*)CONFIG_USER_DATADESTSTART;
+  end  = (uint8_t*)CONFIG_USER_DATADESTEND;
+
+  while (dest != end)
+    {
+      *dest++ = *src++;
+    }
+}
+
+#endif /* CONFIG_NUTTX_KERNEL */
+