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
241
242
|
/***************************************************************************
* Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
* *
* 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 02111-1307 USA. *
***************************************************************************/
/*
* R3000A CPU functions.
*/
#include "r3000a.h"
#include "cdrom.h"
#include "mdec.h"
#include "gte.h"
R3000Acpu *psxCpu = NULL;
psxRegisters psxRegs;
int psxInit() {
SysPrintf(_("Running PCSX Version %s (%s).\n"), PACKAGE_VERSION, __DATE__);
#ifdef PSXREC
if (Config.Cpu == CPU_INTERPRETER) {
psxCpu = &psxInt;
} else psxCpu = &psxRec;
#else
psxCpu = &psxInt;
#endif
Log = 0;
if (psxMemInit() == -1) return -1;
return psxCpu->Init();
}
void psxReset() {
psxMemReset();
memset(&psxRegs, 0x00, sizeof(psxRegs));
psxRegs.pc = 0xbfc00000; // Start in bootstrap
psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled | BEV = 1 | TS = 1
psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A
psxCpu->Reset();
psxHwReset();
psxBiosInit();
if (!Config.HLE)
psxExecuteBios();
#ifdef EMU_LOG
EMU_LOG("*BIOS END*\n");
#endif
Log = 0;
}
void psxShutdown() {
psxMemShutdown();
psxBiosShutdown();
psxCpu->Shutdown();
}
void psxException(u32 code, u32 bd) {
if (!Config.HLE && ((((psxRegs.code = PSXMu32(psxRegs.pc)) >> 24) & 0xfe) == 0x4a)) {
// "hokuto no ken" / "Crash Bandicot 2" ...
// BIOS does not allow to return to GTE instructions
// (just skips it, supposedly because it's scheduled already)
// so we execute it here
extern void (*psxCP2[64])(void *cp2regs);
psxCP2[psxRegs.code & 0x3f](&psxRegs.CP2D);
}
// Set the Cause
psxRegs.CP0.n.Cause = (psxRegs.CP0.n.Cause & 0x300) | code;
// Set the EPC & PC
if (bd) {
#ifdef PSXCPU_LOG
PSXCPU_LOG("bd set!!!\n");
#endif
SysPrintf("bd set!!!\n");
psxRegs.CP0.n.Cause |= 0x80000000;
psxRegs.CP0.n.EPC = (psxRegs.pc - 4);
} else
psxRegs.CP0.n.EPC = (psxRegs.pc);
if (psxRegs.CP0.n.Status & 0x400000)
psxRegs.pc = 0xbfc00180;
else
psxRegs.pc = 0x80000080;
// Set the Status
psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) |
((psxRegs.CP0.n.Status & 0xf) << 2);
if (Config.HLE) psxBiosException();
}
void psxBranchTest() {
if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter)
psxRcntUpdate();
if (psxRegs.interrupt) {
if ((psxRegs.interrupt & (1 << PSXINT_SIO)) && !Config.Sio) { // sio
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_SIO);
sioInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_CDR)) { // cdr
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDR].sCycle) >= psxRegs.intCycle[PSXINT_CDR].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_CDR);
cdrInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_CDREAD)) { // cdr read
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDREAD].sCycle) >= psxRegs.intCycle[PSXINT_CDREAD].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_CDREAD);
cdrReadInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUDMA].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_GPUDMA);
gpuInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_MDECOUTDMA)) { // mdec out dma
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECOUTDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECOUTDMA].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_MDECOUTDMA);
mdec1Interrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_SPUDMA)) { // spu dma
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_SPUDMA].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_SPUDMA);
spuInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_MDECINDMA)) { // mdec in
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECINDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECINDMA].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_MDECINDMA);
mdec0Interrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_GPUOTCDMA)) { // gpu otc
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUOTCDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUOTCDMA].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_GPUOTCDMA);
gpuotcInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_CDRDMA)) { // cdrom
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRDMA].sCycle) >= psxRegs.intCycle[PSXINT_CDRDMA].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_CDRDMA);
cdrDmaInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_CDRPLAY)) { // cdr play timing
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRPLAY].sCycle) >= psxRegs.intCycle[PSXINT_CDRPLAY].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_CDRPLAY);
cdrPlayInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_CDRLID)) { // cdr lid states
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRLID].sCycle) >= psxRegs.intCycle[PSXINT_CDRLID].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_CDRLID);
cdrLidSeekInterrupt();
}
}
if (psxRegs.interrupt & (1 << PSXINT_SPU_UPDATE)) { // scheduled spu update
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPU_UPDATE].sCycle) >= psxRegs.intCycle[PSXINT_SPU_UPDATE].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_SPU_UPDATE);
spuUpdate();
}
}
}
if (psxHu32(0x1070) & psxHu32(0x1074)) {
if ((psxRegs.CP0.n.Status & 0x401) == 0x401) {
#ifdef PSXCPU_LOG
PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074));
#endif
// SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074));
psxException(0x400, 0);
}
}
}
void psxJumpTest() {
if (!Config.HLE && Config.PsxOut) {
u32 call = psxRegs.GPR.n.t1 & 0xff;
switch (psxRegs.pc & 0x1fffff) {
case 0xa0:
#ifdef PSXBIOS_LOG
if (call != 0x28 && call != 0xe) {
PSXBIOS_LOG("Bios call a0: %s (%x) %x,%x,%x,%x\n", biosA0n[call], call, psxRegs.GPR.n.a0, psxRegs.GPR.n.a1, psxRegs.GPR.n.a2, psxRegs.GPR.n.a3); }
#endif
if (biosA0[call])
biosA0[call]();
break;
case 0xb0:
#ifdef PSXBIOS_LOG
if (call != 0x17 && call != 0xb) {
PSXBIOS_LOG("Bios call b0: %s (%x) %x,%x,%x,%x\n", biosB0n[call], call, psxRegs.GPR.n.a0, psxRegs.GPR.n.a1, psxRegs.GPR.n.a2, psxRegs.GPR.n.a3); }
#endif
if (biosB0[call])
biosB0[call]();
break;
case 0xc0:
#ifdef PSXBIOS_LOG
PSXBIOS_LOG("Bios call c0: %s (%x) %x,%x,%x,%x\n", biosC0n[call], call, psxRegs.GPR.n.a0, psxRegs.GPR.n.a1, psxRegs.GPR.n.a2, psxRegs.GPR.n.a3);
#endif
if (biosC0[call])
biosC0[call]();
break;
}
}
}
void psxExecuteBios() {
while (psxRegs.pc != 0x80030000)
psxCpu->ExecuteBlock();
}
|
