atomic.hh revision 7520:67c670459d01
1/* 2 * Copyright (c) 2002-2005 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: Steve Reinhardt 29 */ 30 31#ifndef __CPU_SIMPLE_ATOMIC_HH__ 32#define __CPU_SIMPLE_ATOMIC_HH__ 33 34#include "cpu/simple/base.hh" 35#include "params/AtomicSimpleCPU.hh" 36 37class AtomicSimpleCPU : public BaseSimpleCPU 38{ 39 public: 40 41 AtomicSimpleCPU(AtomicSimpleCPUParams *params); 42 virtual ~AtomicSimpleCPU(); 43 44 virtual void init(); 45 46 private: 47 48 struct TickEvent : public Event 49 { 50 AtomicSimpleCPU *cpu; 51 52 TickEvent(AtomicSimpleCPU *c); 53 void process(); 54 const char *description() const; 55 }; 56 57 TickEvent tickEvent; 58 59 const int width; 60 bool locked; 61 const bool simulate_data_stalls; 62 const bool simulate_inst_stalls; 63 64 // main simulation loop (one cycle) 65 void tick(); 66 67 class CpuPort : public Port 68 { 69 public: 70 71 CpuPort(const std::string &_name, AtomicSimpleCPU *_cpu) 72 : Port(_name, _cpu), cpu(_cpu) 73 { } 74 75 bool snoopRangeSent; 76 77 protected: 78 79 AtomicSimpleCPU *cpu; 80 81 virtual bool recvTiming(PacketPtr pkt); 82 83 virtual Tick recvAtomic(PacketPtr pkt); 84 85 virtual void recvFunctional(PacketPtr pkt); 86 87 virtual void recvStatusChange(Status status); 88 89 virtual void recvRetry(); 90 91 virtual void getDeviceAddressRanges(AddrRangeList &resp, 92 bool &snoop) 93 { resp.clear(); snoop = true; } 94 95 }; 96 CpuPort icachePort; 97 98 class DcachePort : public CpuPort 99 { 100 public: 101 DcachePort(const std::string &_name, AtomicSimpleCPU *_cpu) 102 : CpuPort(_name, _cpu) 103 { } 104 105 virtual void setPeer(Port *port); 106 }; 107 DcachePort dcachePort; 108 109 CpuPort physmemPort; 110 bool hasPhysMemPort; 111 Request ifetch_req; 112 Request data_read_req; 113 Request data_write_req; 114 115 bool dcache_access; 116 Tick dcache_latency; 117 118 Range<Addr> physMemAddr; 119 120 public: 121 122 virtual Port *getPort(const std::string &if_name, int idx = -1); 123 124 virtual void serialize(std::ostream &os); 125 virtual void unserialize(Checkpoint *cp, const std::string §ion); 126 virtual void resume(); 127 128 void switchOut(); 129 void takeOverFrom(BaseCPU *oldCPU); 130 131 virtual void activateContext(int thread_num, int delay); 132 virtual void suspendContext(int thread_num); 133 134 template <class T> 135 Fault read(Addr addr, T &data, unsigned flags); 136 137 Fault readBytes(Addr addr, uint8_t *data, unsigned size, unsigned flags); 138 139 template <class T> 140 Fault write(T data, Addr addr, unsigned flags, uint64_t *res); 141 142 Fault writeBytes(uint8_t *data, unsigned size, 143 Addr addr, unsigned flags, uint64_t *res); 144 145 /** 146 * Print state of address in memory system via PrintReq (for 147 * debugging). 148 */ 149 void printAddr(Addr a); 150}; 151 152#endif // __CPU_SIMPLE_ATOMIC_HH__ 153