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
202
203
204
205
206
207
208
209
|
/*
* Copyright (c) 2006 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_INTERRUPT_HH__
#define __ARCH_SPARC_INTERRUPT_HH__
#include "arch/sparc/faults.hh"
#include "cpu/thread_context.hh"
namespace SparcISA
{
enum interrupts_t {
trap_level_zero,
hstick_match,
interrupt_vector,
cpu_mondo,
dev_mondo,
resumable_error,
soft_interrupt,
num_interrupt_types
};
class Interrupts
{
private:
bool interrupts[num_interrupt_types];
int numPosted;
public:
Interrupts()
{
for (int i = 0; i < num_interrupt_types; ++i) {
interrupts[i] = false;
}
numPosted = 0;
}
void post(int int_type)
{
if (int_type < 0 || int_type >= num_interrupt_types)
panic("posting unknown interrupt!\n");
if (interrupts[int_type] == false) {
interrupts[int_type] = true;
++numPosted;
}
}
void post(int int_num, int index)
{
}
void clear(int int_num, int index)
{
}
void clear_all()
{
}
bool check_interrupts(ThreadContext * tc) const
{
if (numPosted)
return true;
else
return false;
}
Fault getInterrupt(ThreadContext * tc)
{
int hpstate = tc->readMiscReg(MISCREG_HPSTATE);
int pstate = tc->readMiscReg(MISCREG_PSTATE);
bool ie = pstate & PSTATE::ie;
// THESE ARE IN ORDER OF PRIORITY
// since there are early returns, and the highest
// priority interrupts should get serviced,
// it is v. important that new interrupts are inserted
// in the right order of processing
if (hpstate & HPSTATE::hpriv) {
if (ie) {
if (interrupts[hstick_match]) {
if (tc->readMiscReg(MISCREG_HINTP) & 1) {
interrupts[hstick_match] = false;
--numPosted;
return new HstickMatch;
}
}
if (interrupts[interrupt_vector]) {
interrupts[interrupt_vector] = false;
--numPosted;
//HAVEN'T IMPLed THIS YET
return NoFault;
}
} else {
if (interrupts[hstick_match]) {
return NoFault;
}
}
} else {
if (interrupts[trap_level_zero]) {
if ((pstate & HPSTATE::tlz) && (tc->readMiscReg(MISCREG_TL) == 0)) {
interrupts[trap_level_zero] = false;
--numPosted;
return new TrapLevelZero;
}
}
if (interrupts[hstick_match]) {
if (tc->readMiscReg(MISCREG_HINTP) & 1) {
interrupts[hstick_match] = false;
--numPosted;
return new HstickMatch;
}
}
if (ie) {
if (interrupts[cpu_mondo]) {
interrupts[cpu_mondo] = false;
--numPosted;
return new CpuMondo;
}
if (interrupts[dev_mondo]) {
interrupts[dev_mondo] = false;
--numPosted;
return new DevMondo;
}
if (interrupts[soft_interrupt]) {
int il = InterruptLevel(tc->readMiscReg(MISCREG_SOFTINT));
// it seems that interrupt vectors are right in
// the middle of interrupt levels with regard to
// priority, so have to check
if ((il < 6) &&
interrupts[interrupt_vector]) {
// may require more details here since there
// may be lots of interrupts embedded in an
// platform interrupt vector
interrupts[interrupt_vector] = false;
--numPosted;
//HAVEN'T IMPLed YET
return NoFault;
} else {
if (il > tc->readMiscReg(MISCREG_PIL)) {
uint64_t si = tc->readMiscReg(MISCREG_SOFTINT);
uint64_t more = si & ~(1 << (il + 1));
if (!InterruptLevel(more)) {
interrupts[soft_interrupt] = false;
--numPosted;
}
return new InterruptLevelN(il);
}
}
}
if (interrupts[resumable_error]) {
interrupts[resumable_error] = false;
--numPosted;
return new ResumableError;
}
}
}
return NoFault;
}
void updateIntrInfo(ThreadContext * tc)
{
}
void serialize(std::ostream &os)
{
}
void unserialize(Checkpoint *cp, const std::string §ion)
{
}
};
}
#endif // __ARCH_SPARC_INTERRUPT_HH__
|
