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+/* 
+ * Copyright © 2009 by Tor M. Aamodt, Wilson W. L. Fung and the University of 
+ * British Columbia, Vancouver, BC V6T 1Z4, All Rights Reserved.
+ * 
+ * THIS IS A LEGAL DOCUMENT BY DOWNLOADING GPGPU-SIM, YOU ARE AGREEING TO THESE
+ * TERMS AND CONDITIONS.
+ * 
+ * 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 OWNERS 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.
+ * 
+ * NOTE: The files libcuda/cuda_runtime_api.c and src/cuda-sim/cuda-math.h
+ * are derived from the CUDA Toolset available from http://www.nvidia.com/cuda
+ * (property of NVIDIA).  The files benchmarks/BlackScholes/ and 
+ * benchmarks/template/ are derived from the CUDA SDK available from 
+ * http://www.nvidia.com/cuda (also property of NVIDIA).  The files from 
+ * src/intersim/ are derived from Booksim (a simulator provided with the 
+ * textbook "Principles and Practices of Interconnection Networks" available 
+ * from http://cva.stanford.edu/books/ppin/). As such, those files are bound by 
+ * the corresponding legal terms and conditions set forth separately (original 
+ * copyright notices are left in files from these sources and where we have 
+ * modified a file our copyright notice appears before the original copyright 
+ * notice).  
+ * 
+ * Using this version of GPGPU-Sim requires a complete installation of CUDA 
+ * which is distributed seperately by NVIDIA under separate terms and 
+ * conditions.  To use this version of GPGPU-Sim with OpenCL requires a
+ * recent version of NVIDIA's drivers which support OpenCL.
+ * 
+ * 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 of the University of British Columbia nor the names of
+ * its contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * 4. This version of GPGPU-SIM is distributed freely for non-commercial use only.  
+ *  
+ * 5. No nonprofit user may place any restrictions on the use of this software,
+ * including as modified by the user, by any other authorized user.
+ * 
+ * 6. GPGPU-SIM was developed primarily by Tor M. Aamodt, Wilson W. L. Fung, 
+ * Ali Bakhoda, George L. Yuan, at the University of British Columbia, 
+ * Vancouver, BC V6T 1Z4
+ */
+
+#ifndef memory_h_INCLUDED
+#define memory_h_INCLUDED
+
+#ifdef __GNUC__
+#if __GNUC__ >= 4 && __GNUC_MINOR__ >= 3
+   #include <unordered_map>
+   #define mem_map std::unordered_map
+   #define MEM_MAP_RESIZE(hash_size) m_data.rehash(hash_size)
+#else
+   #include <ext/hash_map>
+   namespace std {
+      using namespace __gnu_cxx;
+   }
+   #define mem_map std::hash_map
+   #define MEM_MAP_RESIZE(hash_size) m_data.resize(hash_size)
+#endif
+#else
+   #include <map>
+   #define mem_map std::map
+   #define MEM_MAP_RESIZE(hash_size) 
+#endif
+
+#include <assert.h>
+#include <string.h>
+#include <string>
+#include "../util.h"
+
+typedef address_type mem_addr_t;
+
+#define MEM_BLOCK_SIZE (4*1024)
+
+template<unsigned BSIZE> class mem_storage {
+public:
+   mem_storage( const mem_storage &another )
+   {
+      m_data = new unsigned char[ BSIZE ];
+      memcpy(m_data,another.m_data,BSIZE);
+   }
+   mem_storage()
+   {
+      m_data = new unsigned char[ BSIZE ];
+   }
+   ~mem_storage()
+   {
+      delete[] m_data;
+   }
+
+   void write( unsigned offset, size_t length, const unsigned char *data )
+   {
+      assert( offset + length <= BSIZE );
+      memcpy(m_data+offset,data,length);
+   }
+
+   void read( unsigned offset, size_t length, unsigned char *data ) const
+   {
+      assert( offset + length <= BSIZE );
+      memcpy(data,m_data+offset,length);
+   }
+
+private:
+   unsigned m_nbytes;
+   unsigned char *m_data;
+};
+
+class memory_space
+{
+public:
+   virtual ~memory_space() {}
+   virtual void write( mem_addr_t addr, size_t length, const void *data ) = 0;
+   virtual void read( mem_addr_t addr, size_t length, void *data ) const = 0;;
+};
+
+template<unsigned BSIZE> class memory_space_impl : public memory_space {
+public:
+   memory_space_impl( std::string name, unsigned hash_size );
+
+   virtual void write( mem_addr_t addr, size_t length, const void *data );
+   virtual void read( mem_addr_t addr, size_t length, void *data ) const;
+
+private:
+   std::string m_name;
+   unsigned m_log2_block_size;
+   typedef mem_map<mem_addr_t,mem_storage<BSIZE> > map_t;
+   map_t m_data;
+};
+
+#endif