physical.hh revision 2415
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/memory.hh" 37#include "mem/packet.hh" 38#include "mem/port.hh" 39#include "sim/eventq.hh" 40 41// 42// Functional model for a contiguous block of physical memory. (i.e. RAM) 43// 44class PhysicalMemory : public Memory 45{ 46 class MemoryPort : public Port 47 { 48 PhysicalMemory *memory; 49 50 public: 51 52 MemoryPort(PhysicalMemory *_memory); 53 54 protected: 55 56 virtual bool recvTiming(Packet &pkt); 57 58 virtual Tick recvAtomic(Packet &pkt); 59 60 virtual void recvFunctional(Packet &pkt); 61 62 virtual void recvStatusChange(Status status); 63 64 virtual void getDeviceAddressRanges(AddrRangeList &range_list, 65 bool &owner); 66 67 virtual int deviceBlockSize(); 68 }; 69 70 MemoryPort memoryPort; 71 72 Port * PhysicalMemory::getPort(const char *if_name); 73 74 int lat; 75 76 struct MemResponseEvent : public Event 77 { 78 Packet pkt; 79 MemoryPort *memoryPort; 80 81 MemResponseEvent(Packet &pkt, MemoryPort *memoryPort); 82 void process(); 83 const char *description(); 84 }; 85 86 private: 87 // prevent copying of a MainMemory object 88 PhysicalMemory(const PhysicalMemory &specmem); 89 const PhysicalMemory &operator=(const PhysicalMemory &specmem); 90 91 protected: 92 Addr base_addr; 93 Addr pmem_size; 94 uint8_t *pmem_addr; 95 int page_ptr; 96 97 public: 98 Addr new_page(); 99 uint64_t size() { return pmem_size; } 100 101 public: 102 PhysicalMemory(const std::string &n); 103 virtual ~PhysicalMemory(); 104 105 protected: 106 // error handling for prot_* functions 107 void prot_access_error(Addr addr, int size, Command func); 108 109 public: 110 int deviceBlockSize(); 111 112 void prot_memset(Addr addr, uint8_t val, int size); 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); 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/*uint64_t 129PhysicalMemory::phys_read_qword(Addr addr) const 130{ 131 if (addr + sizeof(uint64_t) > pmem_size) 132 return 0; 133 134 return *(uint64_t *)(pmem_addr + addr); 135}*/ 136 137 138#endif //__PHYSICAL_MEMORY_HH__ 139