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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* 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.
*/
#include "arch/sparc/miscregfile.hh"
#include "base/bitfield.hh"
#include "base/trace.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
using namespace SparcISA;
void
MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
ThreadContext *tc)
{
int64_t time;
switch (miscReg) {
/* Full system only ASRs */
case MISCREG_SOFTINT:
// Check if we are going to interrupt because of something
setReg(miscReg, val);
tc->getCpuPtr()->post_interrupt(soft_interrupt);
warn("Writing to softint not really supported, writing: %#x\n", val);
break;
case MISCREG_SOFTINT_CLR:
return setRegWithEffect(MISCREG_SOFTINT, ~val & softint, tc);
case MISCREG_SOFTINT_SET:
return setRegWithEffect(MISCREG_SOFTINT, val | softint, tc);
case MISCREG_TICK_CMPR:
if (tickCompare == NULL)
tickCompare = new TickCompareEvent(this, tc);
setReg(miscReg, val);
if ((tick_cmpr & mask(63)) && tickCompare->scheduled())
tickCompare->deschedule();
time = (tick_cmpr & mask(63)) - (tick & mask(63));
if (!(tick_cmpr & ~mask(63)) && time > 0)
tickCompare->schedule(time * tc->getCpuPtr()->cycles(1));
panic("writing to TICK compare register %#X\n", val);
break;
case MISCREG_STICK_CMPR:
if (sTickCompare == NULL)
sTickCompare = new STickCompareEvent(this, tc);
setReg(miscReg, val);
if ((stick_cmpr & ~mask(63)) && sTickCompare->scheduled())
sTickCompare->deschedule();
time = ((int64_t)(stick_cmpr & mask(63)) - (int64_t)stick) -
tc->getCpuPtr()->instCount();
if (!(stick_cmpr & ~mask(63)) && time > 0)
sTickCompare->schedule(time * tc->getCpuPtr()->cycles(1) + curTick);
DPRINTF(Timer, "writing to sTICK compare register value %#X\n", val);
break;
case MISCREG_PSTATE:
if (val & PSTATE::ie && !(pstate & PSTATE::ie)) {
tc->getCpuPtr()->checkInterrupts = true;
}
setReg(miscReg, val);
case MISCREG_PIL:
if (val < pil) {
tc->getCpuPtr()->checkInterrupts = true;
}
setReg(miscReg, val);
break;
case MISCREG_HVER:
panic("Shouldn't be writing HVER\n");
case MISCREG_HTBA:
// clear lower 7 bits on writes.
setReg(miscReg, val & ULL(~0x7FFF));
break;
case MISCREG_QUEUE_CPU_MONDO_HEAD:
case MISCREG_QUEUE_CPU_MONDO_TAIL:
case MISCREG_QUEUE_DEV_MONDO_HEAD:
case MISCREG_QUEUE_DEV_MONDO_TAIL:
case MISCREG_QUEUE_RES_ERROR_HEAD:
case MISCREG_QUEUE_RES_ERROR_TAIL:
case MISCREG_QUEUE_NRES_ERROR_HEAD:
case MISCREG_QUEUE_NRES_ERROR_TAIL:
setReg(miscReg, val);
tc->getCpuPtr()->checkInterrupts = true;
break;
case MISCREG_HSTICK_CMPR:
if (hSTickCompare == NULL)
hSTickCompare = new HSTickCompareEvent(this, tc);
setReg(miscReg, val);
if ((hstick_cmpr & ~mask(63)) && hSTickCompare->scheduled())
hSTickCompare->deschedule();
time = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) -
tc->getCpuPtr()->instCount();
if (!(hstick_cmpr & ~mask(63)) && time > 0)
hSTickCompare->schedule(curTick + time * tc->getCpuPtr()->cycles(1));
DPRINTF(Timer, "writing to hsTICK compare register value %#X\n", val);
break;
case MISCREG_HPSTATE:
// T1000 spec says impl. dependent val must always be 1
setReg(miscReg, val | HPSTATE::id);
break;
case MISCREG_HTSTATE:
case MISCREG_STRAND_STS_REG:
setReg(miscReg, val);
break;
default:
panic("Invalid write to FS misc register %s\n", getMiscRegName(miscReg));
}
}
MiscReg
MiscRegFile::readFSRegWithEffect(int miscReg, ThreadContext * tc)
{
switch (miscReg) {
/* Privileged registers. */
case MISCREG_QUEUE_CPU_MONDO_HEAD:
case MISCREG_QUEUE_CPU_MONDO_TAIL:
case MISCREG_QUEUE_DEV_MONDO_HEAD:
case MISCREG_QUEUE_DEV_MONDO_TAIL:
case MISCREG_QUEUE_RES_ERROR_HEAD:
case MISCREG_QUEUE_RES_ERROR_TAIL:
case MISCREG_QUEUE_NRES_ERROR_HEAD:
case MISCREG_QUEUE_NRES_ERROR_TAIL:
case MISCREG_SOFTINT:
case MISCREG_TICK_CMPR:
case MISCREG_STICK_CMPR:
case MISCREG_PIL:
case MISCREG_HPSTATE:
case MISCREG_HINTP:
case MISCREG_HTSTATE:
case MISCREG_STRAND_STS_REG:
case MISCREG_HSTICK_CMPR:
return readReg(miscReg) ;
case MISCREG_HTBA:
return readReg(miscReg) & ULL(~0x7FFF);
case MISCREG_HVER:
return NWindows | MaxTL << 8 | MaxGL << 16;
default:
panic("Invalid read to FS misc register\n");
}
}
/*
In Niagra STICK==TICK so this isn't needed
case MISCREG_STICK:
SparcSystem *sys;
sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
assert(sys != NULL);
return curTick/Clock::Int::ns - sys->sysTick | (stick & ~(mask(63)));
*/
void
MiscRegFile::processTickCompare(ThreadContext *tc)
{
panic("tick compare not implemented\n");
}
void
MiscRegFile::processSTickCompare(ThreadContext *tc)
{
// since our microcode instructions take two cycles we need to check if
// we're actually at the correct cycle or we need to wait a little while
// more
int ticks;
ticks = ((int64_t)(stick_cmpr & mask(63)) - (int64_t)stick) -
tc->getCpuPtr()->instCount();
assert(ticks >= 0 && "stick compare missed interrupt cycle");
if (ticks == 0) {
DPRINTF(Timer, "STick compare cycle reached at %#x\n",
(stick_cmpr & mask(63)));
tc->getCpuPtr()->post_interrupt(soft_interrupt);
tc->getCpuPtr()->checkInterrupts = true;
softint |= ULL(1) << 16;
} else
sTickCompare->schedule(ticks * tc->getCpuPtr()->cycles(1) + curTick);
}
void
MiscRegFile::processHSTickCompare(ThreadContext *tc)
{
// since our microcode instructions take two cycles we need to check if
// we're actually at the correct cycle or we need to wait a little while
// more
int ticks;
ticks = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) -
tc->getCpuPtr()->instCount();
assert(ticks >= 0 && "hstick compare missed interrupt cycle");
if (ticks == 0) {
DPRINTF(Timer, "HSTick compare cycle reached at %#x\n",
(stick_cmpr & mask(63)));
tc->getCpuPtr()->post_interrupt(hstick_match);
tc->getCpuPtr()->checkInterrupts = true;
// Need to do something to cause interrupt to happen here !!! @todo
} else
sTickCompare->schedule(ticks * tc->getCpuPtr()->cycles(1) + curTick);
}
|
