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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" | |
61ad2a61 | 28 | #include "psxinterpreter.h" |
905b7c25 | 29 | #include "../include/compiler_features.h" |
ef79bbde P |
30 | |
31 | R3000Acpu *psxCpu = NULL; | |
41e82ad4 | 32 | #ifdef DRC_DISABLE |
ef79bbde | 33 | psxRegisters psxRegs; |
41e82ad4 | 34 | #endif |
ef79bbde P |
35 | |
36 | int psxInit() { | |
7a8d521f | 37 | SysPrintf(_("Running PCSX Version %s (%s).\n"), PCSX_VERSION, __DATE__); |
ef79bbde | 38 | |
41e82ad4 | 39 | #ifndef DRC_DISABLE |
ef79bbde P |
40 | if (Config.Cpu == CPU_INTERPRETER) { |
41 | psxCpu = &psxInt; | |
42 | } else psxCpu = &psxRec; | |
43 | #else | |
61ad2a61 | 44 | Config.Cpu = CPU_INTERPRETER; |
ef79bbde P |
45 | psxCpu = &psxInt; |
46 | #endif | |
47 | ||
48 | Log = 0; | |
49 | ||
50 | if (psxMemInit() == -1) return -1; | |
51 | ||
52 | return psxCpu->Init(); | |
53 | } | |
54 | ||
55 | void psxReset() { | |
ef79bbde P |
56 | psxMemReset(); |
57 | ||
58 | memset(&psxRegs, 0, sizeof(psxRegs)); | |
59 | ||
60 | psxRegs.pc = 0xbfc00000; // Start in bootstrap | |
61 | ||
905b7c25 | 62 | psxRegs.CP0.r[12] = 0x10600000; // COP0 enabled | BEV = 1 | TS = 1 |
ef79bbde | 63 | psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A |
905b7c25 | 64 | if (Config.HLE) |
65 | psxRegs.CP0.n.Status |= 1u << 30; // COP2 enabled | |
ef79bbde | 66 | |
d5aeda23 | 67 | psxCpu->ApplyConfig(); |
c24732c0 | 68 | psxCpu->Reset(); |
69 | ||
ef79bbde P |
70 | psxHwReset(); |
71 | psxBiosInit(); | |
72 | ||
7b75929b | 73 | BiosLikeGPUSetup(); // a bit of a hack but whatever |
74 | ||
7b75929b | 75 | if (!Config.HLE) { |
ef79bbde | 76 | psxExecuteBios(); |
7b75929b | 77 | if (psxRegs.pc == 0x80030000 && !Config.SlowBoot) |
78 | BiosBootBypass(); | |
79 | } | |
ef79bbde P |
80 | |
81 | #ifdef EMU_LOG | |
82 | EMU_LOG("*BIOS END*\n"); | |
83 | #endif | |
84 | Log = 0; | |
85 | } | |
86 | ||
87 | void psxShutdown() { | |
ef79bbde P |
88 | psxBiosShutdown(); |
89 | ||
90 | psxCpu->Shutdown(); | |
7a8d521f | 91 | |
92 | psxMemShutdown(); | |
ef79bbde P |
93 | } |
94 | ||
6d75addf | 95 | // cp0 is passed separately for lightrec to be less messy |
905b7c25 | 96 | void psxException(u32 cause, u32 bd, psxCP0Regs *cp0) { |
97 | u32 opcode = intFakeFetch(psxRegs.pc); | |
943a507a | 98 | |
905b7c25 | 99 | if (unlikely(!Config.HLE && ((((opcode) >> 24) & 0xfe) == 0x4a))) { |
665e364a | 100 | // "hokuto no ken" / "Crash Bandicot 2" ... |
101 | // BIOS does not allow to return to GTE instructions | |
102 | // (just skips it, supposedly because it's scheduled already) | |
62656449 | 103 | // so we execute it here |
6d75addf | 104 | psxCP2Regs *cp2 = (void *)(cp0 + 1); |
905b7c25 | 105 | psxRegs.code = opcode; |
106 | psxCP2[opcode & 0x3f](cp2); | |
665e364a | 107 | } |
108 | ||
ef79bbde | 109 | // Set the Cause |
905b7c25 | 110 | cp0->n.Cause = (cp0->n.Cause & 0x300) | cause; |
ef79bbde P |
111 | |
112 | // Set the EPC & PC | |
113 | if (bd) { | |
114 | #ifdef PSXCPU_LOG | |
115 | PSXCPU_LOG("bd set!!!\n"); | |
116 | #endif | |
6d75addf | 117 | cp0->n.Cause |= 0x80000000; |
118 | cp0->n.EPC = (psxRegs.pc - 4); | |
ef79bbde | 119 | } else |
6d75addf | 120 | cp0->n.EPC = (psxRegs.pc); |
ef79bbde | 121 | |
6d75addf | 122 | if (cp0->n.Status & 0x400000) |
ef79bbde P |
123 | psxRegs.pc = 0xbfc00180; |
124 | else | |
125 | psxRegs.pc = 0x80000080; | |
126 | ||
127 | // Set the Status | |
6d75addf | 128 | cp0->n.Status = (cp0->n.Status & ~0x3f) | ((cp0->n.Status & 0x0f) << 2); |
ef79bbde | 129 | |
ef79bbde P |
130 | if (Config.HLE) psxBiosException(); |
131 | } | |
132 | ||
133 | void psxBranchTest() { | |
134 | if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter) | |
135 | psxRcntUpdate(); | |
136 | ||
137 | if (psxRegs.interrupt) { | |
d014a471 | 138 | if ((psxRegs.interrupt & (1 << PSXINT_SIO))) { // sio |
d28b54b1 | 139 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) { |
140 | psxRegs.interrupt &= ~(1 << PSXINT_SIO); | |
ef79bbde P |
141 | sioInterrupt(); |
142 | } | |
143 | } | |
d28b54b1 | 144 | if (psxRegs.interrupt & (1 << PSXINT_CDR)) { // cdr |
145 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDR].sCycle) >= psxRegs.intCycle[PSXINT_CDR].cycle) { | |
146 | psxRegs.interrupt &= ~(1 << PSXINT_CDR); | |
ef79bbde P |
147 | cdrInterrupt(); |
148 | } | |
149 | } | |
d28b54b1 | 150 | if (psxRegs.interrupt & (1 << PSXINT_CDREAD)) { // cdr read |
151 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDREAD].sCycle) >= psxRegs.intCycle[PSXINT_CDREAD].cycle) { | |
152 | psxRegs.interrupt &= ~(1 << PSXINT_CDREAD); | |
480e570b | 153 | cdrPlayReadInterrupt(); |
ef79bbde P |
154 | } |
155 | } | |
d28b54b1 | 156 | if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma |
157 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUDMA].cycle) { | |
158 | psxRegs.interrupt &= ~(1 << PSXINT_GPUDMA); | |
ef79bbde P |
159 | gpuInterrupt(); |
160 | } | |
161 | } | |
d28b54b1 | 162 | if (psxRegs.interrupt & (1 << PSXINT_MDECOUTDMA)) { // mdec out dma |
163 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECOUTDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECOUTDMA].cycle) { | |
164 | psxRegs.interrupt &= ~(1 << PSXINT_MDECOUTDMA); | |
ef79bbde P |
165 | mdec1Interrupt(); |
166 | } | |
167 | } | |
d28b54b1 | 168 | if (psxRegs.interrupt & (1 << PSXINT_SPUDMA)) { // spu dma |
169 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_SPUDMA].cycle) { | |
170 | psxRegs.interrupt &= ~(1 << PSXINT_SPUDMA); | |
ef79bbde P |
171 | spuInterrupt(); |
172 | } | |
173 | } | |
528ad661 | 174 | if (psxRegs.interrupt & (1 << PSXINT_MDECINDMA)) { // mdec in |
175 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECINDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECINDMA].cycle) { | |
176 | psxRegs.interrupt &= ~(1 << PSXINT_MDECINDMA); | |
177 | mdec0Interrupt(); | |
178 | } | |
179 | } | |
57a757ce | 180 | if (psxRegs.interrupt & (1 << PSXINT_GPUOTCDMA)) { // gpu otc |
181 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUOTCDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUOTCDMA].cycle) { | |
182 | psxRegs.interrupt &= ~(1 << PSXINT_GPUOTCDMA); | |
183 | gpuotcInterrupt(); | |
184 | } | |
185 | } | |
9f8b032d | 186 | if (psxRegs.interrupt & (1 << PSXINT_CDRDMA)) { // cdrom |
187 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRDMA].sCycle) >= psxRegs.intCycle[PSXINT_CDRDMA].cycle) { | |
188 | psxRegs.interrupt &= ~(1 << PSXINT_CDRDMA); | |
189 | cdrDmaInterrupt(); | |
190 | } | |
191 | } | |
192 | if (psxRegs.interrupt & (1 << PSXINT_CDRLID)) { // cdr lid states | |
193 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRLID].sCycle) >= psxRegs.intCycle[PSXINT_CDRLID].cycle) { | |
194 | psxRegs.interrupt &= ~(1 << PSXINT_CDRLID); | |
195 | cdrLidSeekInterrupt(); | |
196 | } | |
197 | } | |
2b30c129 | 198 | if (psxRegs.interrupt & (1 << PSXINT_SPU_UPDATE)) { // scheduled spu update |
199 | if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPU_UPDATE].sCycle) >= psxRegs.intCycle[PSXINT_SPU_UPDATE].cycle) { | |
200 | psxRegs.interrupt &= ~(1 << PSXINT_SPU_UPDATE); | |
201 | spuUpdate(); | |
202 | } | |
203 | } | |
ef79bbde P |
204 | } |
205 | ||
206 | if (psxHu32(0x1070) & psxHu32(0x1074)) { | |
207 | if ((psxRegs.CP0.n.Status & 0x401) == 0x401) { | |
208 | #ifdef PSXCPU_LOG | |
209 | PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074)); | |
210 | #endif | |
211 | // SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074)); | |
6d75addf | 212 | psxException(0x400, 0, &psxRegs.CP0); |
ef79bbde P |
213 | } |
214 | } | |
215 | } | |
216 | ||
217 | void psxJumpTest() { | |
218 | if (!Config.HLE && Config.PsxOut) { | |
219 | u32 call = psxRegs.GPR.n.t1 & 0xff; | |
220 | switch (psxRegs.pc & 0x1fffff) { | |
221 | case 0xa0: | |
222 | #ifdef PSXBIOS_LOG | |
223 | if (call != 0x28 && call != 0xe) { | |
224 | 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); } | |
225 | #endif | |
226 | if (biosA0[call]) | |
227 | biosA0[call](); | |
228 | break; | |
229 | case 0xb0: | |
230 | #ifdef PSXBIOS_LOG | |
231 | if (call != 0x17 && call != 0xb) { | |
232 | 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); } | |
233 | #endif | |
234 | if (biosB0[call]) | |
235 | biosB0[call](); | |
236 | break; | |
237 | case 0xc0: | |
238 | #ifdef PSXBIOS_LOG | |
239 | 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); | |
240 | #endif | |
241 | if (biosC0[call]) | |
242 | biosC0[call](); | |
243 | break; | |
244 | } | |
245 | } | |
246 | } | |
247 | ||
248 | void psxExecuteBios() { | |
7b75929b | 249 | int i; |
da65071f | 250 | for (i = 0; i < 5000000; i++) { |
251 | psxCpu->ExecuteBlock(EXEC_CALLER_BOOT); | |
252 | if ((psxRegs.pc & 0xff800000) == 0x80000000) | |
253 | break; | |
254 | } | |
255 | if (psxRegs.pc != 0x80030000) | |
256 | SysPrintf("non-standard BIOS detected (%d, %08x)\n", i, psxRegs.pc); | |
ef79bbde P |
257 | } |
258 |