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/*
* Copyright (c) 2001-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* 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;
* neither the name of the copyright holders 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.
*/
/* @file
*/
#ifndef __PHYSICAL_MEMORY_HH__
#define __PHYSICAL_MEMORY_HH__
#include "base/range.hh"
#include "mem/memory.hh"
//
// Functional model for a contiguous block of physical memory. (i.e. RAM)
//
class PhysicalMemory : public Memory
{
private:
// prevent copying of a MainMemory object
PhysicalMemory(const PhysicalMemory &specmem);
const PhysicalMemory &operator=(const PhysicalMemory &specmem);
protected:
Addr base_addr;
Addr pmem_size;
uint8_t *pmem_addr;
int page_ptr;
public:
Addr new_page();
uint64_t size() { return pmem_size; }
public:
PhysicalMemory(const std::string &n);
virtual ~PhysicalMemory();
protected:
// error handling for prot_* functions
void prot_access_error(Addr addr, int size, const std::string &func);
public:
// Read/Write arbitrary amounts of data to simulated memory space
virtual void prot_read(Addr addr, uint8_t *p, int size);
virtual void prot_write(Addr addr, const uint8_t *p, int size);
virtual void prot_memset(Addr addr, uint8_t val, int size);
// fast back-door memory access for vtophys(), remote gdb, etc.
uint64_t phys_read_qword(Addr addr) const;
public:
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string §ion);
};
/*uint64_t
PhysicalMemory::phys_read_qword(Addr addr) const
{
if (addr + sizeof(uint64_t) > pmem_size)
return 0;
return *(uint64_t *)(pmem_addr + addr);
}*/
#endif //__PHYSICAL_MEMORY_HH__
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