monitor_mwait.isa revision 11303:f694764d656d 
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(%(CPU_exec_context)s *, Trace::InstRecord *) const;
51    Fault initiateAcc(%(CPU_exec_context)s *, Trace::InstRecord *) const;
52    Fault completeAcc(PacketPtr, %(CPU_exec_context)s *,
53                      Trace::InstRecord *) const;
54}};
55
56def template MwaitDeclare {{
57    class %(class_name)s : public %(base_class)s
58    {
59        public:
60        // Constructor.
61        %(class_name)s(ExtMachInst machInst);
62        %(MwaitExecDeclare)s
63    };
64}};
65
66def template MwaitInitiateAcc {{
67    Fault %(class_name)s::initiateAcc(CPU_EXEC_CONTEXT * xc,
68            Trace::InstRecord * traceData) const
69    {
70        unsigned s = 0x8;        //size
71        unsigned f = 0;          //flags
72        initiateMemRead(xc, traceData, xc->getAddrMonitor()->vAddr, s, f);
73        return NoFault;
74    }
75}};
76
77def template MwaitCompleteAcc {{
78    Fault %(class_name)s::completeAcc(PacketPtr pkt, CPU_EXEC_CONTEXT *xc,
79            Trace::InstRecord *traceData) const
80    {
81        MicroHalt hltObj(machInst, mnemonic, 0x0);
82        if(xc->mwait(pkt)) {
83            hltObj.execute(xc, traceData);
84        }
85        return NoFault;
86    }
87}};
88
89output header {{
90    class MwaitInst : public X86ISA::X86StaticInst
91    {
92      public:
93        static const RegIndex foldOBit = 0;
94        /// Constructor
95        MwaitInst(const char *_mnemonic, ExtMachInst _machInst,
96                OpClass __opClass) :
97            X86ISA::X86StaticInst(_mnemonic, _machInst, __opClass)
98        {
99            flags[IsMemRef] = 1;
100            flags[IsLoad] = 1;
101        }
102
103        std::string generateDisassembly(Addr pc,
104                const SymbolTable *symtab) const;
105    };
106}};
107
108output decoder {{
109    std::string MwaitInst::generateDisassembly(Addr PC,
110            const SymbolTable *symtab) const
111    {
112        std::stringstream response;
113
114        // Although mwait could take hints from eax and ecx, the _srcRegIdx
115        // is not set, and thus should not be printed here
116        printMnemonic(response, mnemonic);
117        return response.str();
118    }
119}};
120
121def format MwaitInst(code, *opt_flags) {{
122    iop = InstObjParams(name, Name, 'MwaitInst', code, opt_flags)
123    header_output = MwaitDeclare.subst(iop)
124    decoder_output = BasicConstructor.subst(iop)
125    decode_block = BasicDecode.subst(iop)
126    exec_output = BasicExecute.subst(iop)
127    exec_output += MwaitInitiateAcc.subst(iop)
128    exec_output += MwaitCompleteAcc.subst(iop)
129}};
130
131