physical.hh revision 2497
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 29/* @file 30 */ 31 32#ifndef __PHYSICAL_MEMORY_HH__ 33#define __PHYSICAL_MEMORY_HH__ 34 35#include "base/range.hh" 36#include "mem/mem_object.hh" 37#include "mem/packet.hh" 38#include "mem/port.hh" 39#include "sim/eventq.hh" 40#include <map> 41#include <string> 42 43// 44// Functional model for a contiguous block of physical memory. (i.e. RAM) 45// 46class PhysicalMemory : public MemObject 47{ 48 class MemoryPort : public Port 49 { 50 PhysicalMemory *memory; 51 52 public: 53 54 MemoryPort(PhysicalMemory *_memory); 55 56 protected: 57 58 virtual bool recvTiming(Packet &pkt); 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 &range_list, 67 bool &owner); 68 69 virtual int deviceBlockSize(); 70 }; 71 72 MemoryPort memPort; 73 74 virtual Port * getPort(const char *if_name); 75 76 int numPorts; 77 78 int lat; 79 80 struct MemResponseEvent : public Event 81 { 82 Packet &pkt; 83 MemoryPort *memoryPort; 84 85 MemResponseEvent(Packet &pkt, MemoryPort *memoryPort); 86 void process(); 87 const char *description(); 88 }; 89 90 private: 91 // prevent copying of a MainMemory object 92 PhysicalMemory(const PhysicalMemory &specmem); 93 const PhysicalMemory &operator=(const PhysicalMemory &specmem); 94 95 protected: 96 Addr base_addr; 97 Addr pmem_size; 98 uint8_t *pmem_addr; 99 int page_ptr; 100 101 public: 102 Addr new_page(); 103 uint64_t size() { return pmem_size; } 104 105 public: 106 PhysicalMemory(const std::string &n, MemObject *bus); 107 virtual ~PhysicalMemory(); 108 109 public: 110 int deviceBlockSize(); 111 void getAddressRanges(AddrRangeList &rangeList, bool &owner); 112 void virtual init() { memPort.sendStatusChange(Port::RangeChange); } 113 114 // fast back-door memory access for vtophys(), remote gdb, etc. 115 // uint64_t phys_read_qword(Addr addr) const; 116 private: 117 bool doTimingAccess(Packet &pkt, MemoryPort *memoryPort); 118 Tick doAtomicAccess(Packet &pkt); 119 void doFunctionalAccess(Packet &pkt); 120 121 void recvStatusChange(Port::Status status); 122 123 public: 124 virtual void serialize(std::ostream &os); 125 virtual void unserialize(Checkpoint *cp, const std::string §ion); 126 127}; 128 129/*uint64_t 130PhysicalMemory::phys_read_qword(Addr addr) const 131{ 132 if (addr + sizeof(uint64_t) > pmem_size) 133 return 0; 134 135 return *(uint64_t *)(pmem_addr + addr); 136}*/ 137 138 139#endif //__PHYSICAL_MEMORY_HH__ 140