From 504178ba1726406e45d21a2824b34f216ee47af3 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Sun, 24 Mar 2013 17:28:38 +0000
Subject: Add kernel build support for Stellaris, Kinetis, LPC43, and NUC1xx
 MCUs

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5781 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/arch/arm/src/kinetis/kinetis_mpuinit.c | 124 +++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 nuttx/arch/arm/src/kinetis/kinetis_mpuinit.c

(limited to 'nuttx/arch/arm/src/kinetis/kinetis_mpuinit.c')

diff --git a/nuttx/arch/arm/src/kinetis/kinetis_mpuinit.c b/nuttx/arch/arm/src/kinetis/kinetis_mpuinit.c
new file mode 100644
index 000000000..bd81374ff
--- /dev/null
+++ b/nuttx/arch/arm/src/kinetis/kinetis_mpuinit.c
@@ -0,0 +1,124 @@
+/****************************************************************************
+ * arch/arm/src/kinetis/kinetis_mpuinit.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 <assert.h>
+
+#include <nuttx/userspace.h>
+
+#include "mpu.h"
+#include "kinetis_mpuinit.h"
+
+#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_ARMV7M_MPU)
+
+/****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+#ifndef MAX
+#  define MAX(a,b) a > b ? a : b
+#endif
+
+#ifndef MIN
+#  define MIN(a,b) a < b ? a : b
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kinetis_mpuinitialize
+ *
+ * Description:
+ *   Configure the MPU to permit user-space access to only restricted SAM3U
+ *   resources.
+ *
+ ****************************************************************************/
+
+void kinetis_mpuinitialize(void)
+{
+  uintptr_t datastart = MIN(USERSPACE->us_datastart, USERSPACE->us_bssstart);
+  uintptr_t dataend   = MAX(USERSPACE->us_dataend,   USERSPACE->us_bssend);
+
+  DEBUGASSERT(USERSPACE->us_textend >= USERSPACE->us_textstart &&
+              dataend >= datastart);
+
+  /* Show MPU information */
+
+  mpu_showtype();
+
+  /* Configure user flash and SRAM space */
+
+  mpu_userflash(USERSPACE->us_textstart,
+                USERSPACE->us_textend - USERSPACE->us_textstart);
+
+  mpu_userintsram(datastart, dataend - datastart);
+
+  /* Then enable the MPU */
+
+  mpu_control(true, false, true);
+}
+
+/****************************************************************************
+ * Name: kinetis_mpu_uheap
+ *
+ * Description:
+ *  Map the user-heap region.
+ *
+ *  This logic may need an extension to handle external SDRAM).
+ *
+ ****************************************************************************/
+
+void kinetis_mpu_uheap(uintptr_t start, size_t size)
+{
+  mpu_userintsram(start, size);
+}
+
+#endif /* CONFIG_NUTTX_KERNEL && CONFIG_ARMV7M_MPU */
+
-- 
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