mt.isa revision 6376 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007 MIPS Technologies, Inc.
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met: redistributions of source code must retain the above copyright
9// notice, this list of conditions and the following disclaimer;
10// redistributions in binary form must reproduce the above copyright
11// notice, this list of conditions and the following disclaimer in the
12// documentation and/or other materials provided with the distribution;
13// neither the name of the copyright holders nor the names of its
14// contributors may be used to endorse or promote products derived from
15// this software without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28//
29// Authors: Korey Sewell
30
31////////////////////////////////////////////////////////////////////
32//
33// MT instructions
34//
35
36output header {{
37        /**
38         * Base class for MIPS MT ASE operations.
39         */
40        class MTOp : public MipsStaticInst
41        {
42                protected:
43
44                /// Constructor
45                MTOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
46                    MipsStaticInst(mnem, _machInst, __opClass), user_mode(false)
47                {
48                }
49
50               std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
51
52                bool user_mode;
53        };
54
55        class MTUserModeOp : public MTOp
56        {
57                protected:
58
59                /// Constructor
60                MTUserModeOp(const char *mnem, MachInst _machInst, OpClass __opClass) :
61                    MTOp(mnem, _machInst, __opClass)
62                {
63                    user_mode = true;
64                }
65
66            //std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
67        };
68}};
69
70output decoder {{
71    std::string MTOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
72    {
73        std::stringstream ss;
74
75        if (strcmp(mnemonic,"mttc0") == 0 || strcmp(mnemonic,"mftc0") == 0) {
76            ccprintf(ss, "%-10s r%d, r%d, %d", mnemonic, RT, RD, SEL);
77        } else if (strcmp(mnemonic,"mftgpr") == 0) {
78            ccprintf(ss, "%-10s r%d, r%d", mnemonic, RD, RT);
79        } else {
80            ccprintf(ss, "%-10s r%d, r%d", mnemonic, RT, RD);
81        }
82
83        return ss.str();
84    }
85}};
86
87output exec {{
88    void getThrRegExValues(%(CPU_exec_context)s *xc,
89            VPEConf0Reg &vpe_conf0, TCBindReg &tc_bind_mt,
90            TCBindReg &tc_bind, VPEControlReg &vpe_control,
91            MVPConf0Reg &mvp_conf0)
92    {
93        vpe_conf0 = xc->readMiscReg(VPEConf0);
94        tc_bind_mt = xc->readRegOtherThread(TCBind + Ctrl_Base_DepTag);
95        tc_bind = xc->readMiscReg(TCBind);
96        vpe_control = xc->readMiscReg(VPEControl);
97        mvp_conf0 = xc->readMiscReg(MVPConf0);
98    }
99
100    void getMTExValues(%(CPU_exec_context)s *xc, Config3Reg &config3)
101    {
102        config3 = xc->readMiscReg(Config3);
103    }
104}};
105
106def template ThreadRegisterExecute {{
107        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
108        {
109            Fault fault = NoFault;
110            int64_t data;
111            %(op_decl)s;
112            %(op_rd)s;
113
114            VPEConf0Reg vpeConf0;
115            TCBindReg tcBindMT;
116            TCBindReg tcBind;
117            VPEControlReg vpeControl;
118            MVPConf0Reg mvpConf0;
119
120            getThrRegExValues(xc, vpeConf0, tcBindMT,
121                                  tcBind, vpeControl, mvpConf0);
122
123            if (isCoprocessorEnabled(xc, 0)) {
124                if (vpeConf0.mvp == 0 && tcBindMT.curVPE != tcBind.curVPE) {
125                    data = -1;
126                } else if (vpeControl.targTC > mvpConf0.ptc) {
127                    data = -1;
128                } else {
129                    int top_bit = 0;
130                    int bottom_bit = 0;
131
132                    if (MT_H == 1) {
133                        top_bit = 63;
134                        bottom_bit = 32;
135                    } else {
136                        top_bit = 31;
137                        bottom_bit = 0;
138                    }
139
140                    %(code)s;
141                }
142            } else {
143                fault = new CoprocessorUnusableFault(0);
144            }
145
146            if(fault == NoFault)
147            {
148                %(op_wb)s;
149            }
150
151            return fault;
152        }
153}};
154
155def template MTExecute{{
156        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, Trace::InstRecord *traceData) const
157        {
158                Fault fault = NoFault;
159                %(op_decl)s;
160                %(op_rd)s;
161
162                Config3Reg config3;
163
164                getMTExValues(xc, config3);
165
166                if (isCoprocessorEnabled(xc, 0)) {
167                    if (config3.mt == 1) {
168                        %(code)s;
169                    } else {
170                        fault = new ReservedInstructionFault();
171                    }
172                } else {
173                    fault = new CoprocessorUnusableFault(0);
174                }
175
176                if(fault == NoFault)
177                {
178                    %(op_wb)s;
179                }
180                return fault;
181        }
182}};
183
184// Primary format for integer operate instructions:
185def format MT_Control(code, *opt_flags) {{
186        inst_flags = ('IsNonSpeculative', )
187        op_type = 'MTOp'
188
189        for x in opt_flags:
190            if x == 'UserMode':
191                op_type = 'MTUserModeOp'
192            else:
193                inst_flags += (x, )
194
195        iop = InstObjParams(name, Name, op_type, code, inst_flags)
196        header_output = BasicDeclare.subst(iop)
197        decoder_output = BasicConstructor.subst(iop)
198        decode_block = BasicDecode.subst(iop)
199        exec_output = MTExecute.subst(iop)
200}};
201
202def format MT_MFTR(code, *flags) {{
203        flags += ('IsNonSpeculative', )
204#        code = 'std::cerr << curTick << \": T\" << xc->tcBase()->threadId() << \": Executing MT INST: ' + name + '\" << endl;\n' + code
205
206        code += 'if (MT_H == 1) {\n'
207        code += 'data = bits(data, top_bit, bottom_bit);\n'
208        code += '}\n'
209        code += 'Rd = data;\n'
210
211        iop = InstObjParams(name, Name, 'MTOp', code, flags)
212        header_output = BasicDeclare.subst(iop)
213        decoder_output = BasicConstructor.subst(iop)
214        decode_block = BasicDecode.subst(iop)
215        exec_output = ThreadRegisterExecute.subst(iop)
216}};
217
218def format MT_MTTR(code, *flags) {{
219        flags += ('IsNonSpeculative', )
220#        code = 'std::cerr << curTick << \": T\" << xc->tcBase()->threadId() << \": Executing MT INST: ' + name + '\" << endl;\n' + code
221        iop = InstObjParams(name, Name, 'MTOp', code, flags)
222        header_output = BasicDeclare.subst(iop)
223        decoder_output = BasicConstructor.subst(iop)
224        decode_block = BasicDecode.subst(iop)
225        exec_output = ThreadRegisterExecute.subst(iop)
226}};
227