isa.hh revision 12106:7784fac1b159 
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#ifndef __ARCH_X86_ISA_HH__
32#define __ARCH_X86_ISA_HH__
33
34#include <iostream>
35#include <string>
36
37#include "arch/x86/regs/float.hh"
38#include "arch/x86/regs/misc.hh"
39#include "arch/x86/registers.hh"
40#include "base/types.hh"
41#include "cpu/reg_class.hh"
42#include "sim/sim_object.hh"
43
44class Checkpoint;
45class EventManager;
46class ThreadContext;
47struct X86ISAParams;
48
49namespace X86ISA
50{
51    class ISA : public SimObject
52    {
53      protected:
54        MiscReg regVal[NUM_MISCREGS];
55        void updateHandyM5Reg(Efer efer, CR0 cr0,
56                SegAttr csAttr, SegAttr ssAttr, RFLAGS rflags,
57                ThreadContext *tc);
58
59      public:
60        typedef X86ISAParams Params;
61
62        void clear();
63
64        ISA(Params *p);
65        const Params *params() const;
66
67        MiscReg readMiscRegNoEffect(int miscReg) const;
68        MiscReg readMiscReg(int miscReg, ThreadContext *tc);
69
70        void setMiscRegNoEffect(int miscReg, MiscReg val);
71        void setMiscReg(int miscReg, MiscReg val, ThreadContext *tc);
72
73        RegId
74        flattenRegId(const RegId& regId) const
75        {
76            switch (regId.classValue()) {
77              case IntRegClass:
78                return RegId(IntRegClass, flattenIntIndex(regId.index()));
79              case FloatRegClass:
80                return RegId(FloatRegClass, flattenFloatIndex(regId.index()));
81              case CCRegClass:
82                return RegId(CCRegClass, flattenCCIndex(regId.index()));
83              case MiscRegClass:
84                return RegId(MiscRegClass, flattenMiscIndex(regId.index()));
85            }
86            return regId;
87        }
88
89        int
90        flattenIntIndex(int reg) const
91        {
92            return reg & ~IntFoldBit;
93        }
94
95        int
96        flattenFloatIndex(int reg) const
97        {
98            if (reg >= NUM_FLOATREGS) {
99                reg = FLOATREG_STACK(reg - NUM_FLOATREGS,
100                                     regVal[MISCREG_X87_TOP]);
101            }
102            return reg;
103        }
104
105        int
106        flattenCCIndex(int reg) const
107        {
108            return reg;
109        }
110
111        int
112        flattenMiscIndex(int reg) const
113        {
114            return reg;
115        }
116
117        void serialize(CheckpointOut &cp) const override;
118        void unserialize(CheckpointIn &cp) override;
119
120        void startup(ThreadContext *tc);
121
122        /// Explicitly import the otherwise hidden startup
123        using SimObject::startup;
124
125    };
126}
127
128#endif
129