isa.cc revision 6313:95f69a436c82 
1/*
2 * Copyright (c) 2009 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#include "arch/sparc/isa.hh"
32#include "cpu/thread_context.hh"
33
34namespace SparcISA
35{
36
37void
38ISA::clear()
39{
40    miscRegFile.clear();
41}
42
43MiscReg
44ISA::readMiscRegNoEffect(int miscReg)
45{
46    return miscRegFile.readRegNoEffect((MiscRegIndex)miscReg);
47}
48
49MiscReg
50ISA::readMiscReg(int miscReg, ThreadContext *tc)
51{
52    return miscRegFile.readReg((MiscRegIndex)miscReg, tc);
53}
54
55void
56ISA::setMiscRegNoEffect(int miscReg, const MiscReg val)
57{
58    miscRegFile.setRegNoEffect((MiscRegIndex)miscReg, val);
59}
60
61void
62ISA::setMiscReg(int miscReg, const MiscReg val, ThreadContext *tc)
63{
64    miscRegFile.setReg((MiscRegIndex)miscReg, val, tc);
65}
66
67int
68ISA::flattenIntIndex(int reg)
69{
70    int gl = miscRegFile.readRegNoEffect(MISCREG_GL);
71    int cwp = miscRegFile.readRegNoEffect(MISCREG_CWP);
72    //DPRINTF(RegisterWindows, "Global Level = %d, Current Window Pointer = %d\n", gl, cwp);
73    int newReg;
74    //The total number of global registers
75    int numGlobals = (MaxGL + 1) * 8;
76    if(reg < 8)
77    {
78        //Global register
79        //Put it in the appropriate set of globals
80        newReg = reg + gl * 8;
81    }
82    else if(reg < NumIntArchRegs)
83    {
84        //Regular windowed register
85        //Put it in the window pointed to by cwp
86        newReg = numGlobals +
87            ((reg - 8 - cwp * 16 + NWindows * 16) % (NWindows * 16));
88    }
89    else if(reg < NumIntArchRegs + NumMicroIntRegs)
90    {
91        //Microcode register
92        //Displace from the end of the regular registers
93        newReg = reg - NumIntArchRegs + numGlobals + NWindows * 16;
94    }
95    else if(reg < 2 * NumIntArchRegs + NumMicroIntRegs)
96    {
97        reg -= (NumIntArchRegs + NumMicroIntRegs);
98        if(reg < 8)
99        {
100            //Global register from the next window
101            //Put it in the appropriate set of globals
102            newReg = reg + gl * 8;
103        }
104        else
105        {
106            //Windowed register from the previous window
107            //Put it in the window before the one pointed to by cwp
108            newReg = numGlobals +
109                ((reg - 8 - (cwp - 1) * 16 + NWindows * 16) % (NWindows * 16));
110        }
111    }
112    else if(reg < 3 * NumIntArchRegs + NumMicroIntRegs)
113    {
114        reg -= (2 * NumIntArchRegs + NumMicroIntRegs);
115        if(reg < 8)
116        {
117            //Global register from the previous window
118            //Put it in the appropriate set of globals
119            newReg = reg + gl * 8;
120        }
121        else
122        {
123            //Windowed register from the next window
124            //Put it in the window after the one pointed to by cwp
125            newReg = numGlobals +
126                ((reg - 8 - (cwp + 1) * 16 + NWindows * 16) % (NWindows * 16));
127        }
128    }
129    else
130        panic("Tried to flatten invalid register index %d!\n", reg);
131    DPRINTF(RegisterWindows, "Flattened register %d to %d.\n", reg, newReg);
132    return newReg;
133}
134
135void
136ISA::serialize(EventManager *em, std::ostream &os)
137{
138    miscRegFile.serialize(em, os);
139}
140
141void
142ISA::unserialize(EventManager *em, Checkpoint *cp, const std::string &section)
143{
144    miscRegFile.unserialize(em, cp, section);
145}
146
147}
148