simple_mem.hh revision 9120:48eeef8a0997
1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2001-2005 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ron Dreslinski 41 * Andreas Hansson 42 */ 43 44/** 45 * @file 46 * SimpleMemory declaration 47 */ 48 49#ifndef __SIMPLE_MEMORY_HH__ 50#define __SIMPLE_MEMORY_HH__ 51 52#include "mem/abstract_mem.hh" 53#include "mem/tport.hh" 54#include "params/SimpleMemory.hh" 55 56/** 57 * The simple memory is a basic single-ported memory controller with 58 * an infinite throughput and a fixed latency, potentially with a 59 * variance added to it. It uses a SimpleTimingPort to implement the 60 * timing accesses. 61 */ 62class SimpleMemory : public AbstractMemory 63{ 64 65 private: 66 67 class MemoryPort : public SimpleTimingPort 68 { 69 SimpleMemory& memory; 70 71 public: 72 73 MemoryPort(const std::string& _name, SimpleMemory& _memory); 74 75 protected: 76 77 virtual Tick recvAtomic(PacketPtr pkt); 78 79 virtual void recvFunctional(PacketPtr pkt); 80 81 virtual AddrRangeList getAddrRanges() const; 82 83 }; 84 85 MemoryPort port; 86 87 Tick lat; 88 Tick lat_var; 89 90 public: 91 92 typedef SimpleMemoryParams Params; 93 SimpleMemory(const Params *p); 94 virtual ~SimpleMemory() { } 95 96 unsigned int drain(Event* de); 97 98 virtual SlavePort& getSlavePort(const std::string& if_name, int idx = -1); 99 virtual void init(); 100 101 const Params * 102 params() const 103 { 104 return dynamic_cast<const Params *>(_params); 105 } 106 107 protected: 108 109 Tick doAtomicAccess(PacketPtr pkt); 110 void doFunctionalAccess(PacketPtr pkt); 111 virtual Tick calculateLatency(PacketPtr pkt); 112 113}; 114 115#endif //__SIMPLE_MEMORY_HH__ 116