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
233
234
235
236
237
238
239
240
|
// SPDX-License-Identifier: GPL-2.0+
/*******************************************************************************
* QtMips - MIPS 32-bit Architecture Subset Simulator
*
* Implemented to support following courses:
*
* B35APO - Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b35apo
*
* B4M35PAP - Advanced Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
*
* Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
* Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Faculty of Electrical Engineering (http://www.fel.cvut.cz)
* Czech Technical University (http://www.cvut.cz/)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
******************************************************************************/
#include "qtmipsmachine.h"
#include "programloader.h"
using namespace machine;
QtMipsMachine::QtMipsMachine(const MachineConfig &cc) : QObject(), mcnf(&cc) {
MemoryAccess *cpu_mem;
stat = ST_READY;
ProgramLoader program(cc.elf());
mem_program_only = new Memory();
program.to_memory(mem_program_only);
program_end = program.end();
regs = new Registers();
if (program.get_executable_entry())
regs->pc_abs_jmp(program.get_executable_entry());
mem = new Memory(*mem_program_only);
cpu_mem = mem;
#if 1
physaddrspace = new PhysAddrSpace();
physaddrspace->insert_range(mem, 0x00000000, 0xefffffff, false);
MemoryAccess *periph = new SimplePeripheral();
physaddrspace->insert_range(periph, 0xffffc000, 0xffffcfff, true);
cpu_mem = physaddrspace;
#endif
cch_program = new Cache(cpu_mem, &cc.cache_program(), cc.memory_access_time_read(), cc.memory_access_time_write());
cch_data = new Cache(cpu_mem, &cc.cache_data(), cc.memory_access_time_read(), cc.memory_access_time_write());
if (cc.pipelined())
cr = new CorePipelined(regs, cch_program, cch_data, cc.hazard_unit());
else
cr = new CoreSingle(regs, cch_program, cch_data, cc.delay_slot());
run_t = new QTimer(this);
set_speed(0); // In default run as fast as possible
connect(run_t, SIGNAL(timeout()), this, SLOT(step_timer()));
}
QtMipsMachine::~QtMipsMachine() {
if (run_t != nullptr)
delete run_t;
run_t = nullptr;
if (cr != nullptr)
delete cr;
cr = nullptr;
if (regs != nullptr)
delete regs;
regs = nullptr;
if (mem != nullptr)
delete mem;
mem = nullptr;
if (cch_program != nullptr)
delete cch_program;
cch_program = nullptr;
if (cch_data != nullptr)
delete cch_data;
cch_data = nullptr;
if (physaddrspace != nullptr)
delete physaddrspace;
physaddrspace = nullptr;
if (mem_program_only != nullptr)
delete mem_program_only;
mem_program_only = nullptr;
}
const MachineConfig &QtMipsMachine::config() {
return mcnf;
}
void QtMipsMachine::set_speed(unsigned val) {
run_t->setInterval(val);
}
const Registers *QtMipsMachine::registers() {
return regs;
}
const Memory *QtMipsMachine::memory() {
return mem;
}
Memory *QtMipsMachine::memory_rw() {
return mem;
}
const Cache *QtMipsMachine::cache_program() {
return cch_program;
}
const Cache *QtMipsMachine::cache_data() {
return cch_data;
}
Cache *QtMipsMachine::cache_data_rw() {
return cch_data;
}
const Core *QtMipsMachine::core() {
return cr;
}
const CoreSingle *QtMipsMachine::core_singe() {
return mcnf.pipelined() ? nullptr : (const CoreSingle*)cr;
}
const CorePipelined *QtMipsMachine::core_pipelined() {
return mcnf.pipelined() ? (const CorePipelined*)cr : nullptr;
}
enum QtMipsMachine::Status QtMipsMachine::status() {
return stat;
}
bool QtMipsMachine::exited() {
return stat == ST_EXIT || stat == ST_TRAPPED;
}
// We don't allow to call control methods when machine exited or if it's busy
// We rather silently fail.
#define CTL_GUARD do { if (exited() || stat == ST_BUSY) return; } while(false)
void QtMipsMachine::play() {
CTL_GUARD;
set_status(ST_RUNNING);
run_t->start();
step_internal(true);
}
void QtMipsMachine::pause() {
if (stat != ST_BUSY)
CTL_GUARD;
set_status(ST_READY);
run_t->stop();
}
void QtMipsMachine::step_internal(bool skip_break) {
CTL_GUARD;
enum Status stat_prev = stat;
set_status(ST_BUSY);
emit tick();
try {
cr->step(skip_break);
} catch (QtMipsException &e) {
run_t->stop();
set_status(ST_TRAPPED);
emit program_trap(e);
return;
}
if (regs->read_pc() >= program_end) {
run_t->stop();
set_status(ST_EXIT);
emit program_exit();
} else {
if (stat == ST_BUSY)
set_status(stat_prev);
}
emit post_tick();
}
void QtMipsMachine::step() {
step_internal(true);
}
void QtMipsMachine::step_timer() {
step_internal();
}
void QtMipsMachine::restart() {
pause();
regs->reset();
mem->reset(*mem_program_only);
cch_program->reset();
cch_data->reset();
cr->reset();
set_status(ST_READY);
}
void QtMipsMachine::set_status(enum Status st) {
bool change = st != stat;
stat = st;
if (change)
emit status_change(st);
}
void QtMipsMachine::register_exception_handler(ExceptionCause excause,
ExceptionHandler *exhandler) {
if (cr != nullptr)
cr->register_exception_handler(excause, exhandler);
}
void QtMipsMachine::insert_hwbreak(std::uint32_t address) {
if (cr != nullptr)
cr->insert_hwbreak(address);
}
void QtMipsMachine::remove_hwbreak(std::uint32_t address) {
if (cr != nullptr)
cr->remove_hwbreak(address);
}
bool QtMipsMachine::is_hwbreak(std::uint32_t address) {
if (cr != nullptr)
return cr->is_hwbreak(address);
return false;
}
|
