physical.hh revision 2414 
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
39//
40// Functional model for a contiguous block of physical memory. (i.e. RAM)
41//
42class PhysicalMemory : public Memory
43{
44    class MemoryPort : public Port
45    {
46        PhysicalMemory *memory;
47
48      public:
49
50        MemoryPort(PhysicalMemory *_memory);
51
52      protected:
53
54        virtual bool recvTiming(Packet &pkt);
55
56        virtual Tick recvAtomic(Packet &pkt);
57
58        virtual void recvFunctional(Packet &pkt);
59
60        virtual void recvStatusChange(Status status);
61
62        virtual void getDeviceAddressRanges(AddrRangeList &range_list,
63                                            bool &owner);
64
65        virtual int deviceBlockSize();
66
67    };
68
69    MemoryPort memoryPort;
70
71    Port * PhysicalMemory::getPort(const char *if_name);
72
73    int lat;
74
75    //event to send response needs to be here
76
77  private:
78    // prevent copying of a MainMemory object
79    PhysicalMemory(const PhysicalMemory &specmem);
80    const PhysicalMemory &operator=(const PhysicalMemory &specmem);
81
82  protected:
83    Addr base_addr;
84    Addr pmem_size;
85    uint8_t *pmem_addr;
86    int page_ptr;
87
88  public:
89    Addr new_page();
90    uint64_t size() { return pmem_size; }
91
92  public:
93    PhysicalMemory(const std::string &n);
94    virtual ~PhysicalMemory();
95
96  protected:
97    // error handling for prot_* functions
98    void prot_access_error(Addr addr, int size, Command func);
99
100  public:
101    virtual int deviceBlockSize();
102
103    void prot_memset(Addr addr, uint8_t val, int size);
104
105    // fast back-door memory access for vtophys(), remote gdb, etc.
106    // uint64_t phys_read_qword(Addr addr) const;
107  private:
108    bool doTimingAccess(Packet &pkt);
109    Tick doAtomicAccess(Packet &pkt);
110    void doFunctionalAccess(Packet &pkt);
111
112    void recvStatusChange(Port::Status status);
113
114  public:
115    virtual void serialize(std::ostream &os);
116    virtual void unserialize(Checkpoint *cp, const std::string &section);
117};
118
119/*uint64_t
120PhysicalMemory::phys_read_qword(Addr addr) const
121{
122    if (addr + sizeof(uint64_t) > pmem_size)
123        return 0;
124
125    return *(uint64_t *)(pmem_addr + addr);
126}*/
127
128
129#endif //__PHYSICAL_MEMORY_HH__
130