registers.hh revision 6321 
1/*
2 * Copyright (c) 2003-2005 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: Gabe Black
29 */
30
31#ifndef __ARCH_ALPHA_REGFILE_HH__
32#define __ARCH_ALPHA_REGFILE_HH__
33
34#include "arch/alpha/isa_traits.hh"
35#include "arch/alpha/miscregfile.hh"
36#include "arch/alpha/types.hh"
37#include "arch/alpha/mt.hh"
38#include "sim/faults.hh"
39
40#include <string>
41
42//XXX These should be implemented by someone who knows the alpha stuff better
43
44class Checkpoint;
45class EventManager;
46class ThreadContext;
47
48namespace AlphaISA {
49
50// redirected register map, really only used for the full system case.
51extern const int reg_redir[NumIntRegs];
52
53class RegFile {
54  protected:
55    Addr pc;   // program counter
56    Addr npc;  // next-cycle program counter
57    Addr nnpc; // next next-cycle program counter
58
59  public:
60    Addr
61    readPC()
62    {
63        return pc;
64    }
65
66    void
67    setPC(Addr val)
68    {
69        pc = val;
70    }
71
72    Addr
73    readNextPC()
74    {
75        return npc;
76    }
77
78    void
79    setNextPC(Addr val)
80    {
81        npc = val;
82    }
83
84    Addr
85    readNextNPC()
86    {
87        return npc + sizeof(MachInst);
88    }
89
90    void
91    setNextNPC(Addr val)
92    { }
93
94  public:
95#if FULL_SYSTEM
96    int intrflag;                   // interrupt flag
97#endif // FULL_SYSTEM
98
99    void
100    clear()
101    {
102    }
103
104    void serialize(EventManager *em, std::ostream &os);
105    void unserialize(EventManager *em, Checkpoint *cp,
106        const std::string &section);
107};
108
109void copyRegs(ThreadContext *src, ThreadContext *dest);
110
111void copyMiscRegs(ThreadContext *src, ThreadContext *dest);
112
113} // namespace AlphaISA
114
115#endif // __ARCH_ALPHA_REGFILE_HH__
116