isa_traits.hh revision 3437:96977e433be6 
1/*
2 * Copyright (c) 2003-2005 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_SPARC_ISA_TRAITS_HH__
32#define __ARCH_SPARC_ISA_TRAITS_HH__
33
34#include "arch/sparc/types.hh"
35#include "base/misc.hh"
36#include "config/full_system.hh"
37#include "sim/host.hh"
38
39class ThreadContext;
40class FastCPU;
41//class FullCPU;
42class Checkpoint;
43
44class StaticInst;
45class StaticInstPtr;
46
47namespace BigEndianGuest {}
48
49#if FULL_SYSTEM
50#include "arch/sparc/isa_fullsys_traits.hh"
51#endif
52
53namespace SparcISA
54{
55    class RegFile;
56
57    //This makes sure the big endian versions of certain functions are used.
58    using namespace BigEndianGuest;
59
60    // SPARC has a delay slot
61    #define ISA_HAS_DELAY_SLOT 1
62
63    // SPARC NOP (sethi %(hi(0), g0)
64    const MachInst NoopMachInst = 0x01000000;
65
66    const int NumRegularIntRegs = 32;
67    const int NumMicroIntRegs = 1;
68    const int NumIntRegs =
69        NumRegularIntRegs +
70        NumMicroIntRegs;
71    const int NumFloatRegs = 64;
72    const int NumMiscRegs = 40;
73
74    // These enumerate all the registers for dependence tracking.
75    enum DependenceTags {
76        // 0..31 are the integer regs 0..31
77        // 32..95 are the FP regs 0..31, i.e. use (reg + FP_Base_DepTag)
78        FP_Base_DepTag = NumIntRegs,
79        Ctrl_Base_DepTag = NumIntRegs + NumFloatRegs,
80        //XXX These are here solely to get compilation and won't work
81        Fpcr_DepTag = 0,
82        Uniq_DepTag = 0
83    };
84
85
86    // MAXTL - maximum trap level
87    const int MaxPTL = 2;
88    const int MaxTL  = 6;
89    const int MaxGL  = 3;
90    const int MaxPGL = 2;
91
92    // NWINDOWS - number of register windows, can be 3 to 32
93    const int NWindows = 8;
94
95    // semantically meaningful register indices
96    const int ZeroReg = 0;	// architecturally meaningful
97    // the rest of these depend on the ABI
98    const int StackPointerReg = 14;
99    const int ReturnAddressReg = 31; // post call, precall is 15
100    const int ReturnValueReg = 8; // Post return, 24 is pre-return.
101    const int FramePointerReg = 30;
102    const int ArgumentReg0 = 8;
103    const int ArgumentReg1 = 9;
104    const int ArgumentReg2 = 10;
105    const int ArgumentReg3 = 11;
106    const int ArgumentReg4 = 12;
107    const int ArgumentReg5 = 13;
108    // Some OS syscall use a second register (o1) to return a second value
109    const int SyscallPseudoReturnReg = ArgumentReg1;
110
111    //XXX These numbers are bogus
112    const int MaxInstSrcRegs = 8;
113    const int MaxInstDestRegs = 9;
114
115    //8K. This value is implmentation specific; and should probably
116    //be somewhere else.
117    const int LogVMPageSize = 13;
118    const int VMPageSize = (1 << LogVMPageSize);
119
120    //Why does both the previous set of constants and this one exist?
121    const int PageShift = 13;
122    const int PageBytes = ULL(1) << PageShift;
123
124    const int BranchPredAddrShiftAmt = 2;
125
126    const int MachineBytes = 8;
127    const int WordBytes = 4;
128    const int HalfwordBytes = 2;
129    const int ByteBytes = 1;
130
131    void serialize(std::ostream & os);
132
133    void unserialize(Checkpoint *cp, const std::string &section);
134
135    StaticInstPtr decodeInst(ExtMachInst);
136
137    // return a no-op instruction... used for instruction fetch faults
138    extern const MachInst NoopMachInst;
139}
140
141#endif // __ARCH_SPARC_ISA_TRAITS_HH__
142