Commit | Line | Data |
---|---|---|
ef79bbde P |
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" | |
630b122b | 28 | #include "psxinterpreter.h" |
ef79bbde P |
29 | |
30 | R3000Acpu *psxCpu = NULL; | |
630b122b | 31 | #ifdef DRC_DISABLE |
93c9e42a | 32 | psxRegisters psxRegs; |
1a32b0f8 | 33 | #endif |
ef79bbde P |
34 | |
35 | int psxInit() { | |
202b29d4 | 36 | SysPrintf(_("Running PCSX Version %s (%s).\n"), PCSX_VERSION, __DATE__); |
ef79bbde | 37 | |
630b122b | 38 | #ifndef DRC_DISABLE |
ef79bbde P |
39 | if (Config.Cpu == CPU_INTERPRETER) { |
40 | psxCpu = &psxInt; | |
41 | } else psxCpu = &psxRec; | |
42 | #else | |
630b122b | 43 | Config.Cpu = CPU_INTERPRETER; |
ef79bbde P |
44 | psxCpu = &psxInt; |
45 | #endif | |
46 | ||
47 | Log = 0; | |
48 | ||
49 | if (psxMemInit() == -1) return -1; | |
50 | ||
51 | return psxCpu->Init(); | |
52 | } | |
53 | ||
54 | void psxReset() { | |
ef79bbde P |
55 | psxMemReset(); |
56 | ||
630b122b | 57 | memset(&psxRegs, 0, sizeof(psxRegs)); |
58 | ||
ef79bbde P |
59 | psxRegs.pc = 0xbfc00000; // Start in bootstrap |
60 | ||
61 | psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled | BEV = 1 | TS = 1 | |
62 | psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A | |
63 | ||
1562ed57 | 64 | psxCpu->ApplyConfig(); |
c24732c0 | 65 | psxCpu->Reset(); |
66 | ||
ef79bbde P |
67 | psxHwReset(); |
68 | psxBiosInit(); | |
69 | ||
f5f5f5dd | 70 | BiosLikeGPUSetup(); // a bit of a hack but whatever |
71 | ||
f5f5f5dd | 72 | if (!Config.HLE) { |
ef79bbde | 73 | psxExecuteBios(); |
f5f5f5dd | 74 | if (psxRegs.pc == 0x80030000 && !Config.SlowBoot) |
75 | BiosBootBypass(); | |
76 | } | |
ef79bbde P |
77 | |
78 | #ifdef EMU_LOG | |
79 | EMU_LOG("*BIOS END*\n"); | |
80 | #endif | |
81 | Log = 0; | |
82 | } | |
83 | ||
84 | void psxShutdown() { | |
ef79bbde P |
85 | psxBiosShutdown(); |
86 | ||
87 | psxCpu->Shutdown(); | |
479d58cf PC |
88 | |
89 | psxMemShutdown(); | |
ef79bbde P |
90 | } |
91 | ||
6c62131f | 92 | // cp0 is passed separately for lightrec to be less messy |
93 | void psxException(u32 code, u32 bd, psxCP0Regs *cp0) { | |
cab87bf3 | 94 | psxRegs.code = PSXMu32(psxRegs.pc); |
630b122b | 95 | |
7a811716 | 96 | if (!Config.HLE && ((((psxRegs.code) >> 24) & 0xfe) == 0x4a)) { |
665e364a | 97 | // "hokuto no ken" / "Crash Bandicot 2" ... |
98 | // BIOS does not allow to return to GTE instructions | |
99 | // (just skips it, supposedly because it's scheduled already) | |
62656449 | 100 | // so we execute it here |
6c62131f | 101 | psxCP2Regs *cp2 = (void *)(cp0 + 1); |
102 | psxCP2[psxRegs.code & 0x3f](cp2); | |
665e364a | 103 | } |
104 | ||
ef79bbde | 105 | // Set the Cause |
6c62131f | 106 | cp0->n.Cause = (cp0->n.Cause & 0x300) | code; |
ef79bbde P |
107 | |
108 | // Set the EPC & PC | |
109 | if (bd) { | |
110 | #ifdef PSXCPU_LOG | |
111 | PSXCPU_LOG("bd set!!!\n"); | |
112 | #endif | |
6c62131f | 113 | cp0->n.Cause |= 0x80000000; |
114 | cp0->n.EPC = (psxRegs.pc - 4); | |
ef79bbde | 115 | } else |
6c62131f | 116 | cp0->n.EPC = (psxRegs.pc); |
ef79bbde | 117 | |
6c62131f | 118 | if (cp0->n.Status & 0x400000) |
ef79bbde P |
119 | psxRegs.pc = 0xbfc00180; |
120 | else | |
121 | psxRegs.pc = 0x80000080; | |
122 | ||
123 | // Set the Status | |
6c62131f | 124 | cp0->n.Status = (cp0->n.Status & ~0x3f) | ((cp0->n.Status & 0x0f) << 2); |
ef79bbde | 125 | |
ef79bbde P |
126 | if (Config.HLE) psxBiosException(); |
127 | } | |
128 | ||
129 | void psxBranchTest() { | |
130 | if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter) | |
131 | psxRcntUpdate(); | |
132 | ||
133 | if (psxRegs.interrupt) { | |
840639a5 | 134 | if ((psxRegs.interrupt & (1 << PSXINT_SIO))) { // sio |
d28b54b1 | 135 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) { |
136 | psxRegs.interrupt &= ~(1 << PSXINT_SIO); | |
ef79bbde P |
137 | sioInterrupt(); |
138 | } | |
139 | } | |
d28b54b1 | 140 | if (psxRegs.interrupt & (1 << PSXINT_CDR)) { // cdr |
141 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDR].sCycle) >= psxRegs.intCycle[PSXINT_CDR].cycle) { | |
142 | psxRegs.interrupt &= ~(1 << PSXINT_CDR); | |
ef79bbde P |
143 | cdrInterrupt(); |
144 | } | |
145 | } | |
d28b54b1 | 146 | if (psxRegs.interrupt & (1 << PSXINT_CDREAD)) { // cdr read |
147 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDREAD].sCycle) >= psxRegs.intCycle[PSXINT_CDREAD].cycle) { | |
148 | psxRegs.interrupt &= ~(1 << PSXINT_CDREAD); | |
c4e62180 | 149 | cdrPlayReadInterrupt(); |
ef79bbde P |
150 | } |
151 | } | |
d28b54b1 | 152 | if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma |
153 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUDMA].cycle) { | |
154 | psxRegs.interrupt &= ~(1 << PSXINT_GPUDMA); | |
ef79bbde P |
155 | gpuInterrupt(); |
156 | } | |
157 | } | |
d28b54b1 | 158 | if (psxRegs.interrupt & (1 << PSXINT_MDECOUTDMA)) { // mdec out dma |
159 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECOUTDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECOUTDMA].cycle) { | |
160 | psxRegs.interrupt &= ~(1 << PSXINT_MDECOUTDMA); | |
ef79bbde P |
161 | mdec1Interrupt(); |
162 | } | |
163 | } | |
d28b54b1 | 164 | if (psxRegs.interrupt & (1 << PSXINT_SPUDMA)) { // spu dma |
165 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_SPUDMA].cycle) { | |
166 | psxRegs.interrupt &= ~(1 << PSXINT_SPUDMA); | |
ef79bbde P |
167 | spuInterrupt(); |
168 | } | |
169 | } | |
528ad661 | 170 | if (psxRegs.interrupt & (1 << PSXINT_MDECINDMA)) { // mdec in |
171 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECINDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECINDMA].cycle) { | |
172 | psxRegs.interrupt &= ~(1 << PSXINT_MDECINDMA); | |
173 | mdec0Interrupt(); | |
174 | } | |
175 | } | |
57a757ce | 176 | if (psxRegs.interrupt & (1 << PSXINT_GPUOTCDMA)) { // gpu otc |
177 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUOTCDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUOTCDMA].cycle) { | |
178 | psxRegs.interrupt &= ~(1 << PSXINT_GPUOTCDMA); | |
179 | gpuotcInterrupt(); | |
180 | } | |
181 | } | |
9f8b032d | 182 | if (psxRegs.interrupt & (1 << PSXINT_CDRDMA)) { // cdrom |
183 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRDMA].sCycle) >= psxRegs.intCycle[PSXINT_CDRDMA].cycle) { | |
184 | psxRegs.interrupt &= ~(1 << PSXINT_CDRDMA); | |
185 | cdrDmaInterrupt(); | |
186 | } | |
187 | } | |
188 | if (psxRegs.interrupt & (1 << PSXINT_CDRLID)) { // cdr lid states | |
189 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRLID].sCycle) >= psxRegs.intCycle[PSXINT_CDRLID].cycle) { | |
190 | psxRegs.interrupt &= ~(1 << PSXINT_CDRLID); | |
191 | cdrLidSeekInterrupt(); | |
192 | } | |
193 | } | |
2b30c129 | 194 | if (psxRegs.interrupt & (1 << PSXINT_SPU_UPDATE)) { // scheduled spu update |
195 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPU_UPDATE].sCycle) >= psxRegs.intCycle[PSXINT_SPU_UPDATE].cycle) { | |
196 | psxRegs.interrupt &= ~(1 << PSXINT_SPU_UPDATE); | |
197 | spuUpdate(); | |
198 | } | |
199 | } | |
ef79bbde P |
200 | } |
201 | ||
202 | if (psxHu32(0x1070) & psxHu32(0x1074)) { | |
203 | if ((psxRegs.CP0.n.Status & 0x401) == 0x401) { | |
204 | #ifdef PSXCPU_LOG | |
205 | PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074)); | |
206 | #endif | |
207 | // SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074)); | |
6c62131f | 208 | psxException(0x400, 0, &psxRegs.CP0); |
ef79bbde P |
209 | } |
210 | } | |
211 | } | |
212 | ||
213 | void psxJumpTest() { | |
214 | if (!Config.HLE && Config.PsxOut) { | |
215 | u32 call = psxRegs.GPR.n.t1 & 0xff; | |
216 | switch (psxRegs.pc & 0x1fffff) { | |
217 | case 0xa0: | |
218 | #ifdef PSXBIOS_LOG | |
219 | if (call != 0x28 && call != 0xe) { | |
220 | 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); } | |
221 | #endif | |
222 | if (biosA0[call]) | |
223 | biosA0[call](); | |
224 | break; | |
225 | case 0xb0: | |
226 | #ifdef PSXBIOS_LOG | |
227 | if (call != 0x17 && call != 0xb) { | |
228 | 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); } | |
229 | #endif | |
230 | if (biosB0[call]) | |
231 | biosB0[call](); | |
232 | break; | |
233 | case 0xc0: | |
234 | #ifdef PSXBIOS_LOG | |
235 | 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); | |
236 | #endif | |
237 | if (biosC0[call]) | |
238 | biosC0[call](); | |
239 | break; | |
240 | } | |
241 | } | |
242 | } | |
243 | ||
244 | void psxExecuteBios() { | |
f5f5f5dd | 245 | int i; |
f3bc907d | 246 | for (i = 0; i < 5000000; i++) { |
247 | psxCpu->ExecuteBlock(EXEC_CALLER_BOOT); | |
248 | if ((psxRegs.pc & 0xff800000) == 0x80000000) | |
249 | break; | |
250 | } | |
251 | if (psxRegs.pc != 0x80030000) | |
252 | SysPrintf("non-standard BIOS detected (%d, %08x)\n", i, psxRegs.pc); | |
ef79bbde P |
253 | } |
254 |