utility.cc revision 5086 
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{
41
42uint64_t getArgument(ThreadContext *tc, int number, bool fp)
43{
44#if FULL_SYSTEM
45    if (number < NumArgumentRegs) {
46        if (fp)
47            return tc->readFloatRegBits(ArgumentReg[number]);
48        else
49            return tc->readIntReg(ArgumentReg[number]);
50    } else {
51        Addr sp = tc->readIntReg(StackPointerReg);
52        VirtualPort *vp = tc->getVirtPort(tc);
53        uint64_t arg = vp->read<uint64_t>(sp +
54                           (number-NumArgumentRegs) * sizeof(uint64_t));
55        tc->delVirtPort(vp);
56        return arg;
57    }
58#else
59    panic("getArgument() is Full system only\n");
60    M5_DUMMY_RETURN
61#endif
62}
63
64} // namespace AlphaISA
65
66