addr_mapper.hh revision 10713 
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 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Andreas Hansson
38 */
39
40#ifndef __MEM_ADDR_MAPPER_HH__
41#define __MEM_ADDR_MAPPER_HH__
42
43#include "mem/mem_object.hh"
44#include "params/AddrMapper.hh"
45#include "params/RangeAddrMapper.hh"
46
47/**
48 * An address mapper changes the packet addresses in going from the
49 * slave port side of the mapper to the master port side. When the
50 * slave port is queried for the address ranges, it also performs the
51 * necessary range updates. Note that snoop requests that travel from
52 * the master port (i.e. the memory side) to the slave port are
53 * currently not modified.
54 */
55
56class AddrMapper : public MemObject
57{
58
59  public:
60
61    AddrMapper(const AddrMapperParams* params);
62
63    virtual ~AddrMapper() { }
64
65    virtual BaseMasterPort& getMasterPort(const std::string& if_name,
66                                          PortID idx = InvalidPortID);
67
68    virtual BaseSlavePort& getSlavePort(const std::string& if_name,
69                                        PortID idx = InvalidPortID);
70
71    virtual void init();
72
73  protected:
74
75    /**
76     * This function does the actual remapping of one address to another.
77     * It is pure virtual in this case to to allow any implementation
78     * required.
79     * @param addr the address to remap
80     * @return the new address (can be unchanged)
81     */
82    virtual Addr remapAddr(Addr addr) const = 0;
83
84    class AddrMapperSenderState : public Packet::SenderState
85    {
86
87      public:
88
89        /**
90         * Construct a new sender state to remember the original address.
91         *
92         * @param _origAddr Address before remapping
93         */
94        AddrMapperSenderState(Addr _origAddr) : origAddr(_origAddr)
95        { }
96
97        /** Destructor */
98        ~AddrMapperSenderState() { }
99
100        /** The original address the packet was destined for */
101        Addr origAddr;
102
103    };
104
105    class MapperMasterPort : public MasterPort
106    {
107
108      public:
109
110        MapperMasterPort(const std::string& _name, AddrMapper& _mapper)
111            : MasterPort(_name, &_mapper), mapper(_mapper)
112        { }
113
114      protected:
115
116        void recvFunctionalSnoop(PacketPtr pkt)
117        {
118            mapper.recvFunctionalSnoop(pkt);
119        }
120
121        Tick recvAtomicSnoop(PacketPtr pkt)
122        {
123            return mapper.recvAtomicSnoop(pkt);
124        }
125
126        bool recvTimingResp(PacketPtr pkt)
127        {
128            return mapper.recvTimingResp(pkt);
129        }
130
131        void recvTimingSnoopReq(PacketPtr pkt)
132        {
133            mapper.recvTimingSnoopReq(pkt);
134        }
135
136        void recvRangeChange()
137        {
138            mapper.recvRangeChange();
139        }
140
141        bool isSnooping() const
142        {
143            return mapper.isSnooping();
144        }
145
146        void recvReqRetry()
147        {
148            mapper.recvReqRetry();
149        }
150
151      private:
152
153        AddrMapper& mapper;
154
155    };
156
157    /** Instance of master port, facing the memory side */
158    MapperMasterPort masterPort;
159
160    class MapperSlavePort : public SlavePort
161    {
162
163      public:
164
165        MapperSlavePort(const std::string& _name, AddrMapper& _mapper)
166            : SlavePort(_name, &_mapper), mapper(_mapper)
167        { }
168
169      protected:
170
171        void recvFunctional(PacketPtr pkt)
172        {
173            mapper.recvFunctional(pkt);
174        }
175
176        Tick recvAtomic(PacketPtr pkt)
177        {
178            return mapper.recvAtomic(pkt);
179        }
180
181        bool recvTimingReq(PacketPtr pkt)
182        {
183            return mapper.recvTimingReq(pkt);
184        }
185
186        bool recvTimingSnoopResp(PacketPtr pkt)
187        {
188            return mapper.recvTimingSnoopResp(pkt);
189        }
190
191        AddrRangeList getAddrRanges() const
192        {
193            return mapper.getAddrRanges();
194        }
195
196        void recvRespRetry()
197        {
198            mapper.recvRespRetry();
199        }
200
201      private:
202
203        AddrMapper& mapper;
204
205    };
206
207    /** Instance of slave port, i.e. on the CPU side */
208    MapperSlavePort slavePort;
209
210    void recvFunctional(PacketPtr pkt);
211
212    void recvFunctionalSnoop(PacketPtr pkt);
213
214    Tick recvAtomic(PacketPtr pkt);
215
216    Tick recvAtomicSnoop(PacketPtr pkt);
217
218    bool recvTimingReq(PacketPtr pkt);
219
220    bool recvTimingResp(PacketPtr pkt);
221
222    void recvTimingSnoopReq(PacketPtr pkt);
223
224    bool recvTimingSnoopResp(PacketPtr pkt);
225
226    virtual AddrRangeList getAddrRanges() const = 0;
227
228    bool isSnooping() const;
229
230    void recvReqRetry();
231
232    void recvRespRetry();
233
234    void recvRangeChange();
235};
236
237/**
238 * Range address mapper that maps a set of original ranges to a set of
239 * remapped ranges, where a specific range is of the same size
240 * (original and remapped), only with an offset. It's useful for cases
241 * where memory is mapped to two different locations
242 */
243class RangeAddrMapper : public AddrMapper
244{
245
246  public:
247
248    RangeAddrMapper(const RangeAddrMapperParams* p);
249
250    ~RangeAddrMapper() { }
251
252    AddrRangeList getAddrRanges() const;
253
254  protected:
255
256    /**
257     * This contains a list of ranges the should be remapped. It must
258     * be the exact same length as remappedRanges which describes what
259     * manipulation should be done to each range.
260     */
261    std::vector<AddrRange> originalRanges;
262
263    /**
264     * This contains a list of ranges that addresses should be
265     * remapped to. See the description for originalRanges above
266     */
267    std::vector<AddrRange> remappedRanges;
268
269    Addr remapAddr(Addr addr) const;
270
271};
272
273#endif //__MEM_ADDR_MAPPER_HH__
274