summaryrefslogtreecommitdiff
path: root/src/cpu/o3/alpha/dyn_inst_impl.hh
blob: 50cdec408de6bd348358da0b9e2de4ece0c50de3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
 * Copyright (c) 2004-2006 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Kevin Lim
 */

#include "cpu/o3/alpha/dyn_inst.hh"

template <class Impl>
AlphaDynInst<Impl>::AlphaDynInst(ExtMachInst inst, Addr PC, Addr NPC,
                                 Addr Pred_PC, Addr Pred_NPC,
                                 InstSeqNum seq_num, O3CPU *cpu)
    : BaseDynInst<Impl>(inst, PC, NPC, Pred_PC, Pred_NPC, seq_num, cpu)
{
    initVars();
}

template <class Impl>
AlphaDynInst<Impl>::AlphaDynInst(StaticInstPtr &_staticInst)
    : BaseDynInst<Impl>(_staticInst)
{
    initVars();
}

template <class Impl>
void
AlphaDynInst<Impl>::initVars()
{
    // Make sure to have the renamed register entries set to the same
    // as the normal register entries.  It will allow the IQ to work
    // without any modifications.
    for (int i = 0; i < this->staticInst->numDestRegs(); i++) {
        this->_destRegIdx[i] = this->staticInst->destRegIdx(i);
    }

    for (int i = 0; i < this->staticInst->numSrcRegs(); i++) {
        this->_srcRegIdx[i] = this->staticInst->srcRegIdx(i);
        this->_readySrcRegIdx[i] = 0;
    }
}

template <class Impl>
Fault
AlphaDynInst<Impl>::execute()
{
    // @todo: Pretty convoluted way to avoid squashing from happening
    // when using the TC during an instruction's execution
    // (specifically for instructions that have side-effects that use
    // the TC).  Fix this.
    bool in_syscall = this->thread->inSyscall;
    this->thread->inSyscall = true;

    this->fault = this->staticInst->execute(this, this->traceData);

    this->thread->inSyscall = in_syscall;

    return this->fault;
}

template <class Impl>
Fault
AlphaDynInst<Impl>::initiateAcc()
{
    // @todo: Pretty convoluted way to avoid squashing from happening
    // when using the TC during an instruction's execution
    // (specifically for instructions that have side-effects that use
    // the TC).  Fix this.
    bool in_syscall = this->thread->inSyscall;
    this->thread->inSyscall = true;

    this->fault = this->staticInst->initiateAcc(this, this->traceData);

    this->thread->inSyscall = in_syscall;

    return this->fault;
}

template <class Impl>
Fault
AlphaDynInst<Impl>::completeAcc(PacketPtr pkt)
{
    this->fault = this->staticInst->completeAcc(pkt, this, this->traceData);

    return this->fault;
}

#if FULL_SYSTEM
template <class Impl>
Fault
AlphaDynInst<Impl>::hwrei()
{
    // Can only do a hwrei when in pal mode.
    if (!(this->readPC() & 0x3))
        return new AlphaISA::UnimplementedOpcodeFault;

    // Set the next PC based on the value of the EXC_ADDR IPR.
    this->setNextPC(this->cpu->readMiscReg(AlphaISA::IPR_EXC_ADDR,
                                           this->threadNumber));

    // Tell CPU to clear any state it needs to if a hwrei is taken.
    this->cpu->hwrei(this->threadNumber);

    // FIXME: XXX check for interrupts? XXX
    return NoFault;
}

template <class Impl>
void
AlphaDynInst<Impl>::trap(Fault fault)
{
    this->cpu->trap(fault, this->threadNumber);
}

template <class Impl>
bool
AlphaDynInst<Impl>::simPalCheck(int palFunc)
{
    return this->cpu->simPalCheck(palFunc, this->threadNumber);
}
#else
template <class Impl>
void
AlphaDynInst<Impl>::syscall(int64_t callnum)
{
    this->cpu->syscall(callnum, this->threadNumber);
}
#endif