utility.cc revision 6329 
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: Nathan Binkert
29 *          Ali Saidi
30 */
31
32#include "arch/alpha/utility.hh"
33
34#if FULL_SYSTEM
35#include "arch/alpha/vtophys.hh"
36#include "mem/vport.hh"
37#endif
38
39namespace AlphaISA {
40
41uint64_t
42getArgument(ThreadContext *tc, int number, bool fp)
43{
44#if FULL_SYSTEM
45    const int NumArgumentRegs = 6;
46    if (number < NumArgumentRegs) {
47        if (fp)
48            return tc->readFloatRegBits(16 + number);
49        else
50            return tc->readIntReg(16 + number);
51    } else {
52        Addr sp = tc->readIntReg(StackPointerReg);
53        VirtualPort *vp = tc->getVirtPort();
54        uint64_t arg = vp->read<uint64_t>(sp +
55                           (number-NumArgumentRegs) * sizeof(uint64_t));
56        return arg;
57    }
58#else
59    panic("getArgument() is Full system only\n");
60    M5_DUMMY_RETURN;
61#endif
62}
63
64void
65copyRegs(ThreadContext *src, ThreadContext *dest)
66{
67    // First loop through the integer registers.
68    for (int i = 0; i < NumIntRegs; ++i)
69        dest->setIntReg(i, src->readIntReg(i));
70
71    // Then loop through the floating point registers.
72    for (int i = 0; i < NumFloatRegs; ++i)
73        dest->setFloatRegBits(i, src->readFloatRegBits(i));
74
75    // Copy misc. registers
76    copyMiscRegs(src, dest);
77
78    // Lastly copy PC/NPC
79    dest->setPC(src->readPC());
80    dest->setNextPC(src->readNextPC());
81}
82
83void
84copyMiscRegs(ThreadContext *src, ThreadContext *dest)
85{
86    dest->setMiscRegNoEffect(MISCREG_FPCR,
87        src->readMiscRegNoEffect(MISCREG_FPCR));
88    dest->setMiscRegNoEffect(MISCREG_UNIQ,
89        src->readMiscRegNoEffect(MISCREG_UNIQ));
90    dest->setMiscRegNoEffect(MISCREG_LOCKFLAG,
91        src->readMiscRegNoEffect(MISCREG_LOCKFLAG));
92    dest->setMiscRegNoEffect(MISCREG_LOCKADDR,
93        src->readMiscRegNoEffect(MISCREG_LOCKADDR));
94
95    copyIprs(src, dest);
96}
97
98} // namespace AlphaISA
99
100