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
|
// 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.
*
******************************************************************************/
#ifndef COP0STATE_H
#define COP0STATE_H
#include <QObject>
#include <cstdint>
#include <machinedefs.h>
namespace machine {
class Core;
class Cop0State : public QObject {
Q_OBJECT
friend class Core;
public:
enum Cop0Regsisters {
Unsupported = 0,
UserLocal,
BadVAddr, // Reports the address for the most recent address-related exception
Count, // Processor cycle count
Compare, // Timer interrupt control
Status, // Processor status and control
Cause, // Cause of last exception
EPC, // Program counter at last exception
EBase, // Exception vector base register
Config, // Configuration registers
COP0REGS_CNT,
};
Cop0State(Core *core = nullptr);
Cop0State(const Cop0State&);
std::uint32_t read_cop0reg(enum Cop0Regsisters reg) const;
std::uint32_t read_cop0reg(std::uint8_t rd, std::uint8_t sel) const; // Read coprocessor 0 register
void write_cop0reg(enum Cop0Regsisters reg, std::uint32_t value);
void write_cop0reg(std::uint8_t reg, std::uint8_t sel, std::uint32_t value); // Write coprocessor 0 register
bool operator ==(const Cop0State &c) const;
bool operator !=(const Cop0State &c) const;
void reset(); // Reset all values to zero
protected:
void setup_core(Core *core);
void update_execption_cause(enum ExceptionCause excause, bool in_delay_slot);
private:
typedef std::uint32_t (Cop0State::*reg_read_t)
(enum Cop0Regsisters reg) const;
typedef void (Cop0State::*reg_write_t)
(enum Cop0Regsisters reg, std::uint32_t value);
struct cop0reg_desc_t {
const char *name;
std::uint32_t write_mask;
reg_read_t reg_read;
reg_write_t reg_write;
};
static const cop0reg_desc_t cop0reg_desc[COP0REGS_CNT];
std::uint32_t read_cop0reg_default(enum Cop0Regsisters reg) const;
void write_cop0reg_default(enum Cop0Regsisters reg, std::uint32_t value);
Core *core;
std::uint32_t cop0reg[COP0REGS_CNT]; // coprocessor 0 registers
};
}
Q_DECLARE_METATYPE(machine::Cop0State)
#endif // COP0STATE_H
|