monitor_mwait.isa revision 12234:78ece221f9f5 
1// Copyright (c) AMD
2// All rights reserved.
3//
4// Authors: Marc Orr
5
6// Monitor Instruction
7
8output header {{
9    class MonitorInst : public X86ISA::X86StaticInst
10    {
11      public:
12        static const RegIndex foldOBit = 0;
13        /// Constructor
14        MonitorInst(const char *_mnemonic, ExtMachInst _machInst,
15                OpClass __opClass) :
16            X86ISA::X86StaticInst(_mnemonic, _machInst, __opClass)
17        { }
18
19        std::string generateDisassembly(Addr pc,
20                const SymbolTable *symtab) const;
21    };
22}};
23
24output decoder {{
25    std::string MonitorInst::generateDisassembly(Addr PC,
26            const SymbolTable *symtab) const
27    {
28        std::stringstream response;
29
30        printMnemonic(response, mnemonic);
31        ccprintf(response, " ");
32        printReg(response, _srcRegIdx[0], machInst.opSize);
33        return response.str();
34    }
35}};
36
37def format MonitorInst(code, *opt_flags) {{
38    iop = InstObjParams(name, Name, 'MonitorInst', code, opt_flags)
39    header_output = BasicDeclare.subst(iop)
40    decoder_output = BasicConstructor.subst(iop)
41    decode_block = BasicDecode.subst(iop)
42    exec_output = BasicExecute.subst(iop)
43}};
44
45
46// Mwait instruction
47
48// Declarations for execute() methods.
49def template MwaitExecDeclare {{
50    Fault execute(ExecContext *, Trace::InstRecord *) const;
51    Fault initiateAcc(ExecContext *, Trace::InstRecord *) const;
52    Fault completeAcc(PacketPtr, ExecContext *, Trace::InstRecord *) const;
53}};
54
55def template MwaitDeclare {{
56    class %(class_name)s : public %(base_class)s
57    {
58        public:
59        // Constructor.
60        %(class_name)s(ExtMachInst machInst);
61        %(MwaitExecDeclare)s
62    };
63}};
64
65def template MwaitInitiateAcc {{
66    Fault %(class_name)s::initiateAcc(ExecContext * xc,
67            Trace::InstRecord * traceData) const
68    {
69        unsigned s = 0x8;        //size
70        unsigned f = 0;          //flags
71        initiateMemRead(xc, traceData, xc->getAddrMonitor()->vAddr, s, f);
72        return NoFault;
73    }
74}};
75
76def template MwaitCompleteAcc {{
77    Fault %(class_name)s::completeAcc(PacketPtr pkt, ExecContext *xc,
78            Trace::InstRecord *traceData) const
79    {
80        MicroHalt hltObj(machInst, mnemonic, 0x0);
81        if(xc->mwait(pkt)) {
82            hltObj.execute(xc, traceData);
83        }
84        return NoFault;
85    }
86}};
87
88output header {{
89    class MwaitInst : public X86ISA::X86StaticInst
90    {
91      public:
92        static const RegIndex foldOBit = 0;
93        /// Constructor
94        MwaitInst(const char *_mnemonic, ExtMachInst _machInst,
95                OpClass __opClass) :
96            X86ISA::X86StaticInst(_mnemonic, _machInst, __opClass)
97        {
98            flags[IsMemRef] = 1;
99            flags[IsLoad] = 1;
100        }
101
102        std::string generateDisassembly(Addr pc,
103                const SymbolTable *symtab) const;
104    };
105}};
106
107output decoder {{
108    std::string MwaitInst::generateDisassembly(Addr PC,
109            const SymbolTable *symtab) const
110    {
111        std::stringstream response;
112
113        // Although mwait could take hints from eax and ecx, the _srcRegIdx
114        // is not set, and thus should not be printed here
115        printMnemonic(response, mnemonic);
116        return response.str();
117    }
118}};
119
120def format MwaitInst(code, *opt_flags) {{
121    iop = InstObjParams(name, Name, 'MwaitInst', code, opt_flags)
122    header_output = MwaitDeclare.subst(iop)
123    decoder_output = BasicConstructor.subst(iop)
124    decode_block = BasicDecode.subst(iop)
125    exec_output = BasicExecute.subst(iop)
126    exec_output += MwaitInitiateAcc.subst(iop)
127    exec_output += MwaitCompleteAcc.subst(iop)
128}};
129
130