1 files changed, 48 insertions, 0 deletions
diff --git a/cpukit/score/cpu/nios2/nios2-mpu-reset.c b/cpukit/score/cpu/nios2/nios2-mpu-reset.c
new file mode 100644
index 0000000000..5431b7da75
--- /dev/null
+++ b/cpukit/score/cpu/nios2/nios2-mpu-reset.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2011 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ *
+ * $Id$
+ */
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/score/nios2-utility.h>
+
+void _Nios2_MPU_Reset( const Nios2_MPU_Configuration *config )
+{
+  uint32_t data_mpubase = (1U << config->data_region_size_log2)
+    | NIOS2_MPUBASE_D;
+  uint32_t inst_mpubase = 1U << config->instruction_region_size_log2;
+  uint32_t mpuacc = NIOS2_MPUACC_WR;
+  int data_count = config->data_region_count;
+  int inst_count = config->instruction_region_count;
+  int i = 0;
+
+  _Nios2_MPU_Disable();
+
+  for ( i = 0; i < data_count; ++i ) {
+    uint32_t index = ((uint32_t) i) << NIOS2_MPUBASE_INDEX_OFFSET;
+
+    _Nios2_Set_ctlreg_mpubase( data_mpubase | index );
+    _Nios2_Set_ctlreg_mpuacc( mpuacc );
+  }
+
+  for ( i = 0; i < inst_count; ++i ) {
+    uint32_t index = ((uint32_t) i) << NIOS2_MPUBASE_INDEX_OFFSET;
+
+    _Nios2_Set_ctlreg_mpubase( inst_mpubase | index );
+    _Nios2_Set_ctlreg_mpuacc( mpuacc );
+  }
+}