physical.hh revision 2416 
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#include "mem/packet.hh"
38#include "mem/port.hh"
39#include "sim/eventq.hh"
40#include <map>
41#include <string>
42//
43// Functional model for a contiguous block of physical memory. (i.e. RAM)
44//
45class PhysicalMemory : public Memory
46{
47    class MemoryPort : public Port
48    {
49        PhysicalMemory *memory;
50
51      public:
52
53        MemoryPort(PhysicalMemory *_memory);
54
55      protected:
56
57        virtual bool recvTiming(Packet &pkt);
58
59        virtual Tick recvAtomic(Packet &pkt);
60
61        virtual void recvFunctional(Packet &pkt);
62
63        virtual void recvStatusChange(Status status);
64
65        virtual void getDeviceAddressRanges(AddrRangeList &range_list,
66                                            bool &owner);
67
68        virtual int deviceBlockSize();
69    };
70
71    std::map<std::string, MemoryPort*> memoryPortList;
72
73    Port * PhysicalMemory::getPort(const char *if_name);
74
75    Port * addPort(std::string portName);
76
77    int numPorts;
78
79    int lat;
80
81    struct MemResponseEvent : public Event
82    {
83        Packet pkt;
84        MemoryPort *memoryPort;
85
86        MemResponseEvent(Packet &pkt, MemoryPort *memoryPort);
87        void process();
88        const char *description();
89    };
90
91  private:
92    // prevent copying of a MainMemory object
93    PhysicalMemory(const PhysicalMemory &specmem);
94    const PhysicalMemory &operator=(const PhysicalMemory &specmem);
95
96  protected:
97    Addr base_addr;
98    Addr pmem_size;
99    uint8_t *pmem_addr;
100    int page_ptr;
101
102  public:
103    Addr new_page();
104    uint64_t size() { return pmem_size; }
105
106  public:
107    PhysicalMemory(const std::string &n);
108    virtual ~PhysicalMemory();
109
110  protected:
111    // error handling for prot_* functions
112    void prot_access_error(Addr addr, int size, Command func);
113
114  public:
115    int deviceBlockSize();
116
117    void prot_memset(Addr addr, uint8_t val, int size);
118
119    // fast back-door memory access for vtophys(), remote gdb, etc.
120    // uint64_t phys_read_qword(Addr addr) const;
121  private:
122    bool doTimingAccess(Packet &pkt, MemoryPort *memoryPort);
123    Tick doAtomicAccess(Packet &pkt);
124    void doFunctionalAccess(Packet &pkt);
125
126    void recvStatusChange(Port::Status status);
127
128  public:
129    virtual void serialize(std::ostream &os);
130    virtual void unserialize(Checkpoint *cp, const std::string &section);
131};
132
133/*uint64_t
134PhysicalMemory::phys_read_qword(Addr addr) const
135{
136    if (addr + sizeof(uint64_t) > pmem_size)
137        return 0;
138
139    return *(uint64_t *)(pmem_addr + addr);
140}*/
141
142
143#endif //__PHYSICAL_MEMORY_HH__
144