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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.
*
* Authors: Ron Dreslinski
*/
/* @file
*/
#ifndef __PHYSICAL_MEMORY_HH__
#define __PHYSICAL_MEMORY_HH__
#include "base/range.hh"
#include "mem/mem_object.hh"
#include "mem/packet.hh"
#include "mem/port.hh"
#include "sim/eventq.hh"
#include <map>
#include <string>
//
// Functional model for a contiguous block of physical memory. (i.e. RAM)
//
class PhysicalMemory : public MemObject
{
class MemoryPort : public Port
{
PhysicalMemory *memory;
public:
MemoryPort(const std::string &_name, PhysicalMemory *_memory);
protected:
virtual bool recvTiming(Packet *pkt);
virtual Tick recvAtomic(Packet *pkt);
virtual void recvFunctional(Packet *pkt);
virtual void recvStatusChange(Status status);
virtual void getDeviceAddressRanges(AddrRangeList &resp,
AddrRangeList &snoop);
virtual int deviceBlockSize();
};
int numPorts;
struct MemResponseEvent : public Event
{
Packet *pkt;
MemoryPort *memoryPort;
MemResponseEvent(Packet *pkt, MemoryPort *memoryPort);
void process();
const char *description();
};
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;
MemoryPort *port;
int page_ptr;
Tick lat;
public:
Addr new_page();
uint64_t size() { return pmem_size; }
public:
PhysicalMemory(const std::string &n, Tick latency);
virtual ~PhysicalMemory();
public:
int deviceBlockSize();
void getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop);
virtual Port *getPort(const std::string &if_name);
void virtual init();
// fast back-door memory access for vtophys(), remote gdb, etc.
// uint64_t phys_read_qword(Addr addr) const;
private:
bool doTimingAccess(Packet *pkt, MemoryPort *memoryPort);
Tick doAtomicAccess(Packet *pkt);
void doFunctionalAccess(Packet *pkt);
void recvStatusChange(Port::Status status);
public:
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string §ion);
};
#endif //__PHYSICAL_MEMORY_HH__
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