abstract_mem.hh revision 2413
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 38// 39// Functional model for a contiguous block of physical memory. (i.e. RAM) 40// 41class PhysicalMemory : public Memory 42{ 43 class MemoryPort : public Port 44 { 45 PhysicalMemory *memory; 46 47 public: 48 49 MemoryPort(PhysicalMemory *_memory); 50 51 protected: 52 53 virtual bool recvTiming(Packet &pkt); 54 55 virtual Tick recvAtomic(Packet &pkt); 56 57 virtual void recvFunctional(Packet &pkt); 58 59 virtual void recvStatusChange(Status status); 60 61 virtual void getDeviceAddressRanges(AddrRangeList &range_list, 62 bool &owner); 63 64 virtual int deviceBlockSize(); 65 66 }; 67 68 MemoryPort memoryPort; 69 70 Port * PhysicalMemory::getPort(const char *if_name); 71 72 int lat; 73 74 //event to send response needs to be here 75 76 private: 77 // prevent copying of a MainMemory object 78 PhysicalMemory(const PhysicalMemory &specmem); 79 const PhysicalMemory &operator=(const PhysicalMemory &specmem); 80 81 protected: 82 Addr base_addr; 83 Addr pmem_size; 84 uint8_t *pmem_addr; 85 int page_ptr; 86 87 public: 88 Addr new_page(); 89 uint64_t size() { return pmem_size; } 90 91 public: 92 PhysicalMemory(const std::string &n); 93 virtual ~PhysicalMemory(); 94 95 protected: 96 // error handling for prot_* functions 97 void prot_access_error(Addr addr, int size, const std::string &func); 98 99 public: 100 virtual int deviceBlockSize(); 101 102 // Read/Write arbitrary amounts of data to simulated memory space 103 void prot_read(Addr addr, uint8_t *p, int size); 104 void prot_write(Addr addr, const uint8_t *p, int size); 105 void prot_memset(Addr addr, uint8_t val, int size); 106 107 // fast back-door memory access for vtophys(), remote gdb, etc. 108 uint64_t phys_read_qword(Addr addr) const; 109 private: 110 bool doTimingAccess(Packet &pkt); 111 Tick doAtomicAccess(Packet &pkt); 112 void doFunctionalAccess(Packet &pkt); 113 114 void recvStatusChange(Port::Status status); 115 116 public: 117 virtual void serialize(std::ostream &os); 118 virtual void unserialize(Checkpoint *cp, const std::string §ion); 119}; 120 121/*uint64_t 122PhysicalMemory::phys_read_qword(Addr addr) const 123{ 124 if (addr + sizeof(uint64_t) > pmem_size) 125 return 0; 126 127 return *(uint64_t *)(pmem_addr + addr); 128}*/ 129 130 131#endif //__PHYSICAL_MEMORY_HH__ 132