1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __ARCH_SPARC_ISA_TRAITS_HH__
#define __ARCH_SPARC_ISA_TRAITS_HH__
#include "base/misc.hh"
#include "config/full_system.hh"
#include "sim/host.hh"
class ExecContext;
class FastCPU;
//class FullCPU;
class Checkpoint;
class StaticInst;
class StaticInstPtr;
namespace BigEndianGuest {}
#if !FULL_SYSTEM
class SyscallReturn
{
public:
template <class T>
SyscallReturn(T v, bool s)
{
retval = (uint64_t)v;
success = s;
}
template <class T>
SyscallReturn(T v)
{
success = (v >= 0);
retval = (uint64_t)v;
}
~SyscallReturn() {}
SyscallReturn& operator=(const SyscallReturn& s)
{
retval = s.retval;
success = s.success;
return *this;
}
bool successful() { return success; }
uint64_t value() { return retval; }
private:
uint64_t retval;
bool success;
};
#endif
namespace SparcISA
{
//This makes sure the big endian versions of certain functions are used.
using namespace BigEndianGuest;
typedef uint32_t MachInst;
typedef uint64_t ExtMachInst;
const int NumIntRegs = 32;
const int NumFloatRegs = 64;
const int NumMiscRegs = 32;
// semantically meaningful register indices
const int ZeroReg = 0; // architecturally meaningful
// the rest of these depend on the ABI
const int StackPointerReg = 14;
const int ReturnAddressReg = 31; // post call, precall is 15
const int ReturnValueReg = 8; // Post return, 24 is pre-return.
const int FramePointerReg = 30;
const int ArgumentReg0 = 8;
const int ArgumentReg1 = 9;
const int ArgumentReg2 = 10;
const int ArgumentReg3 = 11;
const int ArgumentReg4 = 12;
const int ArgumentReg5 = 13;
const int SyscallNumReg = 1;
// Some OS syscall sue a second register (o1) to return a second value
const int SyscallPseudoReturnReg = ArgumentReg1;
//XXX These numbers are bogus
const int MaxInstSrcRegs = 3;
const int MaxInstDestRegs = 2;
typedef uint64_t IntReg;
// control register file contents
typedef uint64_t MiscReg;
typedef double FloatReg;
typedef uint64_t FloatRegBits;
//8K. This value is implmentation specific; and should probably
//be somewhere else.
const int LogVMPageSize = 13;
const int VMPageSize = (1 << LogVMPageSize);
//Why does both the previous set of constants and this one exist?
const int PageShift = 13;
const int PageBytes = ULL(1) << PageShift;
const int BranchPredAddrShiftAmt = 2;
const int MachineBytes = 8;
const int WordBytes = 4;
const int HalfwordBytes = 2;
const int ByteBytes = 1;
void serialize(std::ostream & os);
void unserialize(Checkpoint *cp, const std::string §ion);
StaticInstPtr decodeInst(MachInst);
// return a no-op instruction... used for instruction fetch faults
extern const MachInst NoopMachInst;
// Instruction address compression hooks
inline Addr realPCToFetchPC(const Addr &addr)
{
return addr;
}
inline Addr fetchPCToRealPC(const Addr &addr)
{
return addr;
}
// the size of "fetched" instructions (not necessarily the size
// of real instructions for PISA)
inline size_t fetchInstSize()
{
return sizeof(MachInst);
}
/**
* Function to insure ISA semantics about 0 registers.
* @param xc The execution context.
*/
template <class XC>
void zeroRegisters(XC *xc);
}
#include "arch/sparc/regfile.hh"
namespace SparcISA
{
#if !FULL_SYSTEM
static inline void setSyscallReturn(SyscallReturn return_value,
RegFile *regs)
{
// check for error condition. SPARC syscall convention is to
// indicate success/failure in reg the carry bit of the ccr
// and put the return value itself in the standard return value reg ().
if (return_value.successful()) {
// no error
regs->miscRegs.setReg(MISCREG_CCR_ICC_C, 0);
regs->intRegFile[ReturnValueReg] = return_value.value();
} else {
// got an error, return details
regs->miscRegs.setReg(MISCREG_CCR_ICC_C, 1);
regs->intRegFile[ReturnValueReg] = -return_value.value();
}
}
#endif
};
#endif // __ARCH_SPARC_ISA_TRAITS_HH__
|
