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
|
/**
* Copyright (C) 2013 Citrus Emulator
*
* @file core.cpp
* @author ShizZy <shizzy247@gmail.com>
* @date 2013-09-04
* @brief Core of emulator
*
* @section LICENSE
* 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 at
* http://www.gnu.org/copyleft/gpl.html
*
* Official project repository can be found at:
* http://code.google.com/p/gekko-gc-emu/
*/
#include "log.h"
#include "core.h"
#include "mem_map.h"
#include "arm/armdefs.h"
#include "arm/disassembler/arm_disasm.h"
namespace Core {
typedef struct arm11_core{
conf_object_t* obj;
ARMul_State* state;
memory_space_intf* space;
}arm11_core_t;
arm11_core* core = NULL;
Arm* disasm = NULL;
//ARMul_State* g_arm_state = NULL;
/// Start the core
void Start() {
// TODO(ShizZy): ImplementMe
}
/// Run the core CPU loop
void RunLoop() {
// TODO(ShizZy): ImplementMe
}
/// Step the CPU one instruction
void SingleStep() {
//arm11_core_t* core = (arm11_core_t*)opaque->obj;
ARMul_State *state = core->state;
//if (state->space.conf_obj == NULL){
// state->space.conf_obj = core->space->conf_obj;
// state->space.read = core->space->read;
// state->space.write = core->space->write;
//}
char next_instr[255];
disasm->disasm(state->pc, Memory::Read32(state->pc), next_instr);
NOTICE_LOG(ARM11, "0x%08X : %s", state->pc, next_instr);
for (int i = 0; i < 15; i++) {
NOTICE_LOG(ARM11, "Reg[%02d] = 0x%08X", i, state->Reg[i]);
}
state->step++;
state->cycle++;
state->EndCondition = 0;
state->stop_simulator = 0;
//state->NextInstr = RESUME; /* treat as PC change */
state->last_pc = state->Reg[15];
state->Reg[15] = ARMul_DoInstr(state);
state->Cpsr = (state->Cpsr & 0x0fffffdf) | \
(state->NFlag << 31) | \
(state->ZFlag << 30) | \
(state->CFlag << 29) | \
(state->VFlag << 28);// | \
//(state->TFlag << 5);
//FLUSHPIPE;
}
/// Halt the core
void Halt(const char *msg) {
// TODO(ShizZy): ImplementMe
}
/// Kill the core
void Stop() {
// TODO(ShizZy): ImplementMe
}
/// Initialize the core
const static cpu_config_t arm11_cpu_info = { "armv6", "arm11", 0x0007b000, 0x0007f000, NONCACHE };
int Init() {
NOTICE_LOG(MASTER_LOG, "Core initialized OK");
disasm = new Arm();
core = (arm11_core_t*)malloc(sizeof(arm11_core_t));
//core->obj = new_conf_object(obj_name, core);
ARMul_EmulateInit();
ARMul_State* state = new ARMul_State;
ARMul_NewState(state);
state->abort_model = 0;
state->cpu = (cpu_config_t*)&arm11_cpu_info;
state->bigendSig = LOW;
ARMul_SelectProcessor(state, ARM_v6_Prop | ARM_v5_Prop | ARM_v5e_Prop);
state->lateabtSig = LOW;
mmu_init(state);
/* reset the core to initial state */
ARMul_Reset(state);
state->NextInstr = 0;
state->Emulate = 3;
#if 0
state->mmu.ops.read_byte = arm11_read_byte;
state->mmu.ops.read_halfword = arm11_read_halfword;
state->mmu.ops.read_word = arm11_read_word;
state->mmu.ops.write_byte = arm11_write_byte;
state->mmu.ops.write_halfword = arm11_write_halfword;
state->mmu.ops.write_word = arm11_write_word;
#endif
core->state = state;
state->pc = state->Reg[15] = 0x080c3ee0; // Hardcoded set PC to start address of a homebrew ROM
// this is where most launcher.dat code loads /bunnei
state->Reg[13] = 0x10000000; // Set stack pointer to the top of the stack, not sure if this is
// right? /bunnei
//state->s
return 0;
}
void Shutdown() {
//delete g_arm_state;
//g_arm_state = NULL;
}
} // namespace
|
