RubyPort.hh revision 11308:7d8836fd043d 
1/*
2 * Copyright (c) 2012-2013 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) 2009-2013 Advanced Micro Devices, Inc.
15 * Copyright (c) 2011 Mark D. Hill and David A. Wood
16 * All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions are
20 * met: redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer;
22 * redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution;
25 * neither the name of the copyright holders nor the names of its
26 * contributors may be used to endorse or promote products derived from
27 * this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 */
41
42#ifndef __MEM_RUBY_SYSTEM_RUBYPORT_HH__
43#define __MEM_RUBY_SYSTEM_RUBYPORT_HH__
44
45#include <cassert>
46#include <string>
47
48#include "mem/protocol/RequestStatus.hh"
49#include "mem/ruby/network/MessageBuffer.hh"
50#include "mem/ruby/system/RubySystem.hh"
51#include "mem/mem_object.hh"
52#include "mem/tport.hh"
53#include "params/RubyPort.hh"
54
55class AbstractController;
56
57class RubyPort : public MemObject
58{
59  public:
60    class MemMasterPort : public QueuedMasterPort
61    {
62      private:
63        ReqPacketQueue reqQueue;
64        SnoopRespPacketQueue snoopRespQueue;
65
66      public:
67        MemMasterPort(const std::string &_name, RubyPort *_port);
68
69      protected:
70        bool recvTimingResp(PacketPtr pkt);
71        void recvRangeChange() {}
72    };
73
74    class MemSlavePort : public QueuedSlavePort
75    {
76      private:
77        RespPacketQueue queue;
78        bool access_backing_store;
79        bool no_retry_on_stall;
80
81      public:
82        MemSlavePort(const std::string &_name, RubyPort *_port,
83                     bool _access_backing_store,
84                     PortID id, bool _no_retry_on_stall);
85        void hitCallback(PacketPtr pkt);
86        void evictionCallback(Addr address);
87
88      protected:
89        bool recvTimingReq(PacketPtr pkt);
90
91        Tick recvAtomic(PacketPtr pkt)
92        { panic("RubyPort::MemSlavePort::recvAtomic() not implemented!\n"); }
93
94        void recvFunctional(PacketPtr pkt);
95
96        AddrRangeList getAddrRanges() const
97        { AddrRangeList ranges; return ranges; }
98
99        void addToRetryList();
100
101      private:
102        bool isPhysMemAddress(Addr addr) const;
103    };
104
105    class PioMasterPort : public QueuedMasterPort
106    {
107      private:
108        ReqPacketQueue reqQueue;
109        SnoopRespPacketQueue snoopRespQueue;
110
111      public:
112        PioMasterPort(const std::string &_name, RubyPort *_port);
113
114      protected:
115        bool recvTimingResp(PacketPtr pkt);
116        void recvRangeChange();
117    };
118
119    class PioSlavePort : public QueuedSlavePort
120    {
121      private:
122        RespPacketQueue queue;
123
124      public:
125        PioSlavePort(const std::string &_name, RubyPort *_port);
126
127      protected:
128        bool recvTimingReq(PacketPtr pkt);
129
130        Tick recvAtomic(PacketPtr pkt)
131        { panic("recvAtomic not supported with ruby!"); }
132
133        void recvFunctional(PacketPtr pkt)
134        { panic("recvFunctional should never be called on pio slave port!"); }
135
136        AddrRangeList getAddrRanges() const;
137    };
138
139    struct SenderState : public Packet::SenderState
140    {
141        MemSlavePort *port;
142        SenderState(MemSlavePort * _port) : port(_port)
143        {}
144     };
145
146    typedef RubyPortParams Params;
147    RubyPort(const Params *p);
148    virtual ~RubyPort() {}
149
150    void init() override;
151
152    BaseMasterPort &getMasterPort(const std::string &if_name,
153                                  PortID idx = InvalidPortID) override;
154    BaseSlavePort &getSlavePort(const std::string &if_name,
155                                PortID idx = InvalidPortID) override;
156
157    virtual RequestStatus makeRequest(PacketPtr pkt) = 0;
158    virtual int outstandingCount() const = 0;
159    virtual bool isDeadlockEventScheduled() const = 0;
160    virtual void descheduleDeadlockEvent() = 0;
161
162    //
163    // Called by the controller to give the sequencer a pointer.
164    // A pointer to the controller is needed for atomic support.
165    //
166    void setController(AbstractController* _cntrl) { m_controller = _cntrl; }
167    uint32_t getId() { return m_version; }
168    DrainState drain() override;
169
170    bool isCPUSequencer() { return m_isCPUSequencer; }
171
172  protected:
173    void trySendRetries();
174    void ruby_hit_callback(PacketPtr pkt);
175    void testDrainComplete();
176    void ruby_eviction_callback(Addr address);
177
178    /**
179     * Called by the PIO port when receiving a timing response.
180     *
181     * @param pkt Response packet
182     * @param master_port_id Port id of the PIO port
183     *
184     * @return Whether successfully sent
185     */
186    bool recvTimingResp(PacketPtr pkt, PortID master_port_id);
187
188    RubySystem *m_ruby_system;
189    uint32_t m_version;
190    AbstractController* m_controller;
191    MessageBuffer* m_mandatory_q_ptr;
192    bool m_usingRubyTester;
193    System* system;
194
195  private:
196    bool onRetryList(MemSlavePort * port)
197    {
198        return (std::find(retryList.begin(), retryList.end(), port) !=
199                retryList.end());
200    }
201    void addToRetryList(MemSlavePort * port)
202    {
203        if (onRetryList(port)) return;
204        retryList.push_back(port);
205    }
206
207    PioMasterPort pioMasterPort;
208    PioSlavePort pioSlavePort;
209    MemMasterPort memMasterPort;
210    MemSlavePort memSlavePort;
211    unsigned int gotAddrRanges;
212
213    /** Vector of M5 Ports attached to this Ruby port. */
214    typedef std::vector<MemSlavePort *>::iterator CpuPortIter;
215    std::vector<MemSlavePort *> slave_ports;
216    std::vector<PioMasterPort *> master_ports;
217
218    //
219    // Based on similar code in the M5 bus.  Stores pointers to those ports
220    // that should be called when the Sequencer becomes available after a stall.
221    //
222    std::vector<MemSlavePort *> retryList;
223
224    bool m_isCPUSequencer;
225};
226
227#endif // __MEM_RUBY_SYSTEM_RUBYPORT_HH__
228