1 /***************************************************************************
2 * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
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. *
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. *
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 ***************************************************************************/
21 * R3000A CPU functions.
29 R3000Acpu *psxCpu = NULL;
35 SysPrintf(_("Running PCSX Version %s (%s).\n"), PCSX_VERSION, __DATE__);
37 #if defined(NEW_DYNAREC) || defined(LIGHTREC)
38 if (Config.Cpu == CPU_INTERPRETER) {
40 } else psxCpu = &psxRec;
47 if (psxMemInit() == -1) return -1;
49 return psxCpu->Init();
55 memset(&psxRegs, 0x00, sizeof(psxRegs));
57 psxRegs.pc = 0xbfc00000; // Start in bootstrap
59 psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled | BEV = 1 | TS = 1
60 psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A
71 EMU_LOG("*BIOS END*\n");
83 void psxException(u32 code, u32 bd) {
84 if (!Config.HLE && ((((psxRegs.code = PSXMu32(psxRegs.pc)) >> 24) & 0xfe) == 0x4a)) {
85 // "hokuto no ken" / "Crash Bandicot 2" ...
86 // BIOS does not allow to return to GTE instructions
87 // (just skips it, supposedly because it's scheduled already)
88 // so we execute it here
89 extern void (*psxCP2[64])(void *cp2regs);
90 psxCP2[psxRegs.code & 0x3f](&psxRegs.CP2D);
94 psxRegs.CP0.n.Cause = (psxRegs.CP0.n.Cause & 0x300) | code;
99 PSXCPU_LOG("bd set!!!\n");
101 SysPrintf("bd set!!!\n");
102 psxRegs.CP0.n.Cause |= 0x80000000;
103 psxRegs.CP0.n.EPC = (psxRegs.pc - 4);
105 psxRegs.CP0.n.EPC = (psxRegs.pc);
107 if (psxRegs.CP0.n.Status & 0x400000)
108 psxRegs.pc = 0xbfc00180;
110 psxRegs.pc = 0x80000080;
113 psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) |
114 ((psxRegs.CP0.n.Status & 0xf) << 2);
116 if (Config.HLE) psxBiosException();
119 void psxBranchTest() {
120 if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter)
123 if (psxRegs.interrupt) {
124 if ((psxRegs.interrupt & (1 << PSXINT_SIO)) && !Config.Sio) { // sio
125 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) {
126 psxRegs.interrupt &= ~(1 << PSXINT_SIO);
130 if (psxRegs.interrupt & (1 << PSXINT_CDR)) { // cdr
131 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDR].sCycle) >= psxRegs.intCycle[PSXINT_CDR].cycle) {
132 psxRegs.interrupt &= ~(1 << PSXINT_CDR);
136 if (psxRegs.interrupt & (1 << PSXINT_CDREAD)) { // cdr read
137 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDREAD].sCycle) >= psxRegs.intCycle[PSXINT_CDREAD].cycle) {
138 psxRegs.interrupt &= ~(1 << PSXINT_CDREAD);
142 if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma
143 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUDMA].cycle) {
144 psxRegs.interrupt &= ~(1 << PSXINT_GPUDMA);
148 if (psxRegs.interrupt & (1 << PSXINT_MDECOUTDMA)) { // mdec out dma
149 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECOUTDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECOUTDMA].cycle) {
150 psxRegs.interrupt &= ~(1 << PSXINT_MDECOUTDMA);
154 if (psxRegs.interrupt & (1 << PSXINT_SPUDMA)) { // spu dma
155 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_SPUDMA].cycle) {
156 psxRegs.interrupt &= ~(1 << PSXINT_SPUDMA);
160 if (psxRegs.interrupt & (1 << PSXINT_MDECINDMA)) { // mdec in
161 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECINDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECINDMA].cycle) {
162 psxRegs.interrupt &= ~(1 << PSXINT_MDECINDMA);
166 if (psxRegs.interrupt & (1 << PSXINT_GPUOTCDMA)) { // gpu otc
167 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUOTCDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUOTCDMA].cycle) {
168 psxRegs.interrupt &= ~(1 << PSXINT_GPUOTCDMA);
172 if (psxRegs.interrupt & (1 << PSXINT_CDRDMA)) { // cdrom
173 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRDMA].sCycle) >= psxRegs.intCycle[PSXINT_CDRDMA].cycle) {
174 psxRegs.interrupt &= ~(1 << PSXINT_CDRDMA);
178 if (psxRegs.interrupt & (1 << PSXINT_CDRPLAY)) { // cdr play timing
179 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRPLAY].sCycle) >= psxRegs.intCycle[PSXINT_CDRPLAY].cycle) {
180 psxRegs.interrupt &= ~(1 << PSXINT_CDRPLAY);
184 if (psxRegs.interrupt & (1 << PSXINT_CDRLID)) { // cdr lid states
185 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRLID].sCycle) >= psxRegs.intCycle[PSXINT_CDRLID].cycle) {
186 psxRegs.interrupt &= ~(1 << PSXINT_CDRLID);
187 cdrLidSeekInterrupt();
190 if (psxRegs.interrupt & (1 << PSXINT_SPU_UPDATE)) { // scheduled spu update
191 if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPU_UPDATE].sCycle) >= psxRegs.intCycle[PSXINT_SPU_UPDATE].cycle) {
192 psxRegs.interrupt &= ~(1 << PSXINT_SPU_UPDATE);
198 if (psxHu32(0x1070) & psxHu32(0x1074)) {
199 if ((psxRegs.CP0.n.Status & 0x401) == 0x401) {
201 PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074));
203 // SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074));
204 psxException(0x400, 0);
210 if (!Config.HLE && Config.PsxOut) {
211 u32 call = psxRegs.GPR.n.t1 & 0xff;
212 switch (psxRegs.pc & 0x1fffff) {
215 if (call != 0x28 && call != 0xe) {
216 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); }
223 if (call != 0x17 && call != 0xb) {
224 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); }
231 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 void psxExecuteBios() {
241 while (psxRegs.pc != 0x80030000)
242 psxCpu->ExecuteBlock();