microldstop.hh revision 6132:916f10213bea 
1/*
2 * Copyright (c) 2007 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * Redistribution and use of this software in source and binary forms,
6 * with or without modification, are permitted provided that the
7 * following conditions are met:
8 *
9 * The software must be used only for Non-Commercial Use which means any
10 * use which is NOT directed to receiving any direct monetary
11 * compensation for, or commercial advantage from such use.  Illustrative
12 * examples of non-commercial use are academic research, personal study,
13 * teaching, education and corporate research & development.
14 * Illustrative examples of commercial use are distributing products for
15 * commercial advantage and providing services using the software for
16 * commercial advantage.
17 *
18 * If you wish to use this software or functionality therein that may be
19 * covered by patents for commercial use, please contact:
20 *     Director of Intellectual Property Licensing
21 *     Office of Strategy and Technology
22 *     Hewlett-Packard Company
23 *     1501 Page Mill Road
24 *     Palo Alto, California  94304
25 *
26 * Redistributions of source code must retain the above copyright notice,
27 * this list of conditions and the following disclaimer.  Redistributions
28 * in binary form must reproduce the above copyright notice, this list of
29 * conditions and the following disclaimer in the documentation and/or
30 * other materials provided with the distribution.  Neither the name of
31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
32 * contributors may be used to endorse or promote products derived from
33 * this software without specific prior written permission.  No right of
34 * sublicense is granted herewith.  Derivatives of the software and
35 * output created using the software may be prepared, but only for
36 * Non-Commercial Uses.  Derivatives of the software may be shared with
37 * others provided: (i) the others agree to abide by the list of
38 * conditions herein which includes the Non-Commercial Use restrictions;
39 * and (ii) such Derivatives of the software include the above copyright
40 * notice to acknowledge the contribution from this software where
41 * applicable, this list of conditions and the disclaimer below.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 *
55 * Authors: Gabe Black
56 */
57
58#ifndef __ARCH_X86_INSTS_MICROLDSTOP_HH__
59#define __ARCH_X86_INSTS_MICROLDSTOP_HH__
60
61#include "arch/x86/insts/microop.hh"
62#include "mem/packet.hh"
63#include "mem/request.hh"
64
65namespace X86ISA
66{
67    static const Request::FlagsType SegmentFlagMask = mask(4);
68    static const int FlagShift = 4;
69    enum FlagBit {
70        CPL0FlagBit = 1,
71        AddrSizeFlagBit = 2,
72        StoreCheck = 4
73    };
74
75    /**
76     * Base class for load and store ops
77     */
78    class LdStOp : public X86MicroopBase
79    {
80      protected:
81        const uint8_t scale;
82        const RegIndex index;
83        const RegIndex base;
84        const uint64_t disp;
85        const uint8_t segment;
86        const RegIndex data;
87        const uint8_t dataSize;
88        const uint8_t addressSize;
89        const Request::FlagsType memFlags;
90        RegIndex foldOBit, foldABit;
91
92        //Constructor
93        LdStOp(ExtMachInst _machInst,
94                const char * mnem, const char * _instMnem,
95                bool isMicro, bool isDelayed, bool isFirst, bool isLast,
96                uint8_t _scale, RegIndex _index, RegIndex _base,
97                uint64_t _disp, uint8_t _segment,
98                RegIndex _data,
99                uint8_t _dataSize, uint8_t _addressSize,
100                Request::FlagsType _memFlags,
101                OpClass __opClass) :
102        X86MicroopBase(machInst, mnem, _instMnem,
103                isMicro, isDelayed, isFirst, isLast, __opClass),
104                scale(_scale), index(_index), base(_base),
105                disp(_disp), segment(_segment),
106                data(_data),
107                dataSize(_dataSize), addressSize(_addressSize),
108                memFlags(_memFlags | _segment)
109        {
110            foldOBit = (dataSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0;
111            foldABit =
112                (addressSize == 1 && !_machInst.rex.present) ? 1 << 6 : 0;
113        }
114
115        std::string generateDisassembly(Addr pc,
116            const SymbolTable *symtab) const;
117
118        template<class Context, class MemType>
119        Fault read(Context *xc, Addr EA, MemType & Mem, unsigned flags) const
120        {
121            Fault fault = NoFault;
122            switch(dataSize)
123            {
124              case 1:
125                fault = xc->read(EA, (uint8_t&)Mem, flags);
126                break;
127              case 2:
128                fault = xc->read(EA, (uint16_t&)Mem, flags);
129                break;
130              case 4:
131                fault = xc->read(EA, (uint32_t&)Mem, flags);
132                break;
133              case 8:
134                fault = xc->read(EA, (uint64_t&)Mem, flags);
135                break;
136              default:
137                panic("Bad operand size %d for read at %#x.\n", dataSize, EA);
138            }
139            return fault;
140        }
141
142        template<class Context, class MemType>
143        Fault write(Context *xc, MemType & Mem, Addr EA, unsigned flags) const
144        {
145            Fault fault = NoFault;
146            switch(dataSize)
147            {
148              case 1:
149                fault = xc->write((uint8_t&)Mem, EA, flags, 0);
150                break;
151              case 2:
152                fault = xc->write((uint16_t&)Mem, EA, flags, 0);
153                break;
154              case 4:
155                fault = xc->write((uint32_t&)Mem, EA, flags, 0);
156                break;
157              case 8:
158                fault = xc->write((uint64_t&)Mem, EA, flags, 0);
159                break;
160              default:
161                panic("Bad operand size %d for write at %#x.\n", dataSize, EA);
162            }
163            return fault;
164        }
165
166        uint64_t
167        get(PacketPtr pkt) const
168        {
169            switch(dataSize)
170            {
171              case 1:
172                return pkt->get<uint8_t>();
173              case 2:
174                return pkt->get<uint16_t>();
175              case 4:
176                return pkt->get<uint32_t>();
177              case 8:
178                return pkt->get<uint64_t>();
179              default:
180                panic("Bad operand size %d for read at %#x.\n",
181                        dataSize, pkt->getAddr());
182            }
183        }
184    };
185}
186
187#endif //__ARCH_X86_INSTS_MICROLDSTOP_HH__
188