physical.hh revision 3091:dba513d68c16
1/* 2 * Copyright (c) 2001-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ron Dreslinski 29 */ 30 31/* @file 32 */ 33 34#ifndef __PHYSICAL_MEMORY_HH__ 35#define __PHYSICAL_MEMORY_HH__ 36 37#include "base/range.hh" 38#include "mem/mem_object.hh" 39#include "mem/packet.hh" 40#include "mem/tport.hh" 41#include "sim/eventq.hh" 42#include <map> 43#include <string> 44 45// 46// Functional model for a contiguous block of physical memory. (i.e. RAM) 47// 48class PhysicalMemory : public MemObject 49{ 50 class MemoryPort : public SimpleTimingPort 51 { 52 PhysicalMemory *memory; 53 54 public: 55 56 MemoryPort(const std::string &_name, PhysicalMemory *_memory); 57 58 protected: 59 60 virtual Tick recvAtomic(Packet *pkt); 61 62 virtual void recvFunctional(Packet *pkt); 63 64 virtual void recvStatusChange(Status status); 65 66 virtual void getDeviceAddressRanges(AddrRangeList &resp, 67 AddrRangeList &snoop); 68 69 virtual int deviceBlockSize(); 70 }; 71 72 int numPorts; 73 74 75 private: 76 // prevent copying of a MainMemory object 77 PhysicalMemory(const PhysicalMemory &specmem); 78 const PhysicalMemory &operator=(const PhysicalMemory &specmem); 79 80 protected: 81 uint8_t *pmemAddr; 82 MemoryPort *port; 83 int pagePtr; 84 Tick lat; 85 86 public: 87 Addr new_page(); 88 uint64_t size() { return params()->addrRange.size(); } 89 90 struct Params 91 { 92 std::string name; 93 Range<Addr> addrRange; 94 Tick latency; 95 }; 96 97 protected: 98 Params *_params; 99 100 public: 101 const Params *params() const { return _params; } 102 PhysicalMemory(Params *p); 103 virtual ~PhysicalMemory(); 104 105 public: 106 int deviceBlockSize(); 107 void getAddressRanges(AddrRangeList &resp, AddrRangeList &snoop); 108 virtual Port *getPort(const std::string &if_name, int idx = -1); 109 void virtual init(); 110 unsigned int drain(Event *de); 111 112 protected: 113 void doFunctionalAccess(Packet *pkt); 114 virtual Tick calculateLatency(Packet *pkt); 115 void recvStatusChange(Port::Status status); 116 117 public: 118 virtual void serialize(std::ostream &os); 119 virtual void unserialize(Checkpoint *cp, const std::string §ion); 120 121}; 122 123#endif //__PHYSICAL_MEMORY_HH__ 124