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1 | /*************************************************************************** |
2 | * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team * | |
3 | * * | |
4 | * This program is free software; you can redistribute it and/or modify * | |
5 | * it under the terms of the GNU General Public License as published by * | |
6 | * the Free Software Foundation; either version 2 of the License, or * | |
7 | * (at your option) any later version. * | |
8 | * * | |
9 | * This program is distributed in the hope that it will be useful, * | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
12 | * GNU General Public License for more details. * | |
13 | * * | |
14 | * You should have received a copy of the GNU General Public License * | |
15 | * along with this program; if not, write to the * | |
16 | * Free Software Foundation, Inc., * | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. * | |
18 | ***************************************************************************/ | |
19 | ||
20 | /* | |
21 | * R3000A CPU functions. | |
22 | */ | |
23 | ||
24 | #include "r3000a.h" | |
25 | #include "cdrom.h" | |
26 | #include "mdec.h" | |
27 | #include "gte.h" | |
28 | ||
29 | R3000Acpu *psxCpu = NULL; | |
30 | psxRegisters psxRegs; | |
31 | ||
32 | int psxInit() { | |
33 | SysPrintf(_("Running PCSX Version %s (%s).\n"), PACKAGE_VERSION, __DATE__); | |
34 | ||
35 | #ifdef PSXREC | |
36 | if (Config.Cpu == CPU_INTERPRETER) { | |
37 | psxCpu = &psxInt; | |
38 | } else psxCpu = &psxRec; | |
39 | #else | |
40 | psxCpu = &psxInt; | |
41 | #endif | |
42 | ||
43 | Log = 0; | |
44 | ||
45 | if (psxMemInit() == -1) return -1; | |
46 | ||
47 | return psxCpu->Init(); | |
48 | } | |
49 | ||
50 | void psxReset() { | |
51 | psxCpu->Reset(); | |
52 | ||
53 | psxMemReset(); | |
54 | ||
55 | memset(&psxRegs, 0, sizeof(psxRegs)); | |
56 | ||
57 | psxRegs.pc = 0xbfc00000; // Start in bootstrap | |
58 | ||
59 | psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled | BEV = 1 | TS = 1 | |
60 | psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A | |
61 | ||
62 | psxHwReset(); | |
63 | psxBiosInit(); | |
64 | ||
65 | if (!Config.HLE) | |
66 | psxExecuteBios(); | |
67 | ||
68 | #ifdef EMU_LOG | |
69 | EMU_LOG("*BIOS END*\n"); | |
70 | #endif | |
71 | Log = 0; | |
72 | } | |
73 | ||
74 | void psxShutdown() { | |
75 | psxMemShutdown(); | |
76 | psxBiosShutdown(); | |
77 | ||
78 | psxCpu->Shutdown(); | |
79 | } | |
80 | ||
81 | void psxException(u32 code, u32 bd) { | |
82 | // Set the Cause | |
83 | psxRegs.CP0.n.Cause = code; | |
84 | ||
85 | // Set the EPC & PC | |
86 | if (bd) { | |
87 | #ifdef PSXCPU_LOG | |
88 | PSXCPU_LOG("bd set!!!\n"); | |
89 | #endif | |
90 | SysPrintf("bd set!!!\n"); | |
91 | psxRegs.CP0.n.Cause |= 0x80000000; | |
92 | psxRegs.CP0.n.EPC = (psxRegs.pc - 4); | |
93 | } else | |
94 | psxRegs.CP0.n.EPC = (psxRegs.pc); | |
95 | ||
96 | if (psxRegs.CP0.n.Status & 0x400000) | |
97 | psxRegs.pc = 0xbfc00180; | |
98 | else | |
99 | psxRegs.pc = 0x80000080; | |
100 | ||
101 | // Set the Status | |
102 | psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) | | |
103 | ((psxRegs.CP0.n.Status & 0xf) << 2); | |
104 | ||
105 | if (!Config.HLE && (((PSXMu32(psxRegs.CP0.n.EPC) >> 24) & 0xfe) == 0x4a)) { | |
106 | // "hokuto no ken" / "Crash Bandicot 2" ... fix | |
107 | PSXMu32ref(psxRegs.CP0.n.EPC)&= SWAPu32(~0x02000000); | |
108 | } | |
109 | ||
110 | if (Config.HLE) psxBiosException(); | |
111 | } | |
112 | ||
113 | void psxBranchTest() { | |
114 | if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter) | |
115 | psxRcntUpdate(); | |
116 | ||
117 | if (psxRegs.interrupt) { | |
d28b54b1 | 118 | if ((psxRegs.interrupt & (1 << PSXINT_SIO)) && !Config.Sio) { // sio |
119 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) { | |
120 | psxRegs.interrupt &= ~(1 << PSXINT_SIO); | |
ef79bbde P |
121 | sioInterrupt(); |
122 | } | |
123 | } | |
d28b54b1 | 124 | if (psxRegs.interrupt & (1 << PSXINT_CDR)) { // cdr |
125 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDR].sCycle) >= psxRegs.intCycle[PSXINT_CDR].cycle) { | |
126 | psxRegs.interrupt &= ~(1 << PSXINT_CDR); | |
ef79bbde P |
127 | cdrInterrupt(); |
128 | } | |
129 | } | |
d28b54b1 | 130 | if (psxRegs.interrupt & (1 << PSXINT_CDREAD)) { // cdr read |
131 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDREAD].sCycle) >= psxRegs.intCycle[PSXINT_CDREAD].cycle) { | |
132 | psxRegs.interrupt &= ~(1 << PSXINT_CDREAD); | |
ef79bbde P |
133 | cdrReadInterrupt(); |
134 | } | |
135 | } | |
d28b54b1 | 136 | if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma |
137 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUDMA].cycle) { | |
138 | psxRegs.interrupt &= ~(1 << PSXINT_GPUDMA); | |
ef79bbde P |
139 | gpuInterrupt(); |
140 | } | |
141 | } | |
d28b54b1 | 142 | if (psxRegs.interrupt & (1 << PSXINT_MDECOUTDMA)) { // mdec out dma |
143 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECOUTDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECOUTDMA].cycle) { | |
144 | psxRegs.interrupt &= ~(1 << PSXINT_MDECOUTDMA); | |
ef79bbde P |
145 | mdec1Interrupt(); |
146 | } | |
147 | } | |
d28b54b1 | 148 | if (psxRegs.interrupt & (1 << PSXINT_SPUDMA)) { // spu dma |
149 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_SPUDMA].cycle) { | |
150 | psxRegs.interrupt &= ~(1 << PSXINT_SPUDMA); | |
ef79bbde P |
151 | spuInterrupt(); |
152 | } | |
153 | } | |
528ad661 | 154 | if (psxRegs.interrupt & (1 << PSXINT_MDECINDMA)) { // mdec in |
155 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECINDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECINDMA].cycle) { | |
156 | psxRegs.interrupt &= ~(1 << PSXINT_MDECINDMA); | |
157 | mdec0Interrupt(); | |
158 | } | |
159 | } | |
57a757ce | 160 | if (psxRegs.interrupt & (1 << PSXINT_GPUOTCDMA)) { // gpu otc |
161 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUOTCDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUOTCDMA].cycle) { | |
162 | psxRegs.interrupt &= ~(1 << PSXINT_GPUOTCDMA); | |
163 | gpuotcInterrupt(); | |
164 | } | |
165 | } | |
ef79bbde P |
166 | } |
167 | ||
168 | if (psxHu32(0x1070) & psxHu32(0x1074)) { | |
169 | if ((psxRegs.CP0.n.Status & 0x401) == 0x401) { | |
170 | #ifdef PSXCPU_LOG | |
171 | PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074)); | |
172 | #endif | |
173 | // SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074)); | |
174 | psxException(0x400, 0); | |
175 | } | |
176 | } | |
177 | } | |
178 | ||
179 | void psxJumpTest() { | |
180 | if (!Config.HLE && Config.PsxOut) { | |
181 | u32 call = psxRegs.GPR.n.t1 & 0xff; | |
182 | switch (psxRegs.pc & 0x1fffff) { | |
183 | case 0xa0: | |
184 | #ifdef PSXBIOS_LOG | |
185 | if (call != 0x28 && call != 0xe) { | |
186 | 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); } | |
187 | #endif | |
188 | if (biosA0[call]) | |
189 | biosA0[call](); | |
190 | break; | |
191 | case 0xb0: | |
192 | #ifdef PSXBIOS_LOG | |
193 | if (call != 0x17 && call != 0xb) { | |
194 | 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); } | |
195 | #endif | |
196 | if (biosB0[call]) | |
197 | biosB0[call](); | |
198 | break; | |
199 | case 0xc0: | |
200 | #ifdef PSXBIOS_LOG | |
201 | 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); | |
202 | #endif | |
203 | if (biosC0[call]) | |
204 | biosC0[call](); | |
205 | break; | |
206 | } | |
207 | } | |
208 | } | |
209 | ||
210 | void psxExecuteBios() { | |
211 | while (psxRegs.pc != 0x80030000) | |
212 | psxCpu->ExecuteBlock(); | |
213 | } | |
214 |