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;
33 SysPrintf(_("Running PCSX Version %s (%s).\n"), PACKAGE_VERSION, __DATE__);
36 if (Config.Cpu == CPU_INTERPRETER) {
38 } else psxCpu = &psxRec;
45 if (psxMemInit() == -1) return -1;
47 return psxCpu->Init();
55 memset(&psxRegs, 0, 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
69 EMU_LOG("*BIOS END*\n");
81 void psxException(u32 code, u32 bd) {
83 psxRegs.CP0.n.Cause = code;
88 PSXCPU_LOG("bd set!!!\n");
90 SysPrintf("bd set!!!\n");
91 psxRegs.CP0.n.Cause |= 0x80000000;
92 psxRegs.CP0.n.EPC = (psxRegs.pc - 4);
94 psxRegs.CP0.n.EPC = (psxRegs.pc);
96 if (psxRegs.CP0.n.Status & 0x400000)
97 psxRegs.pc = 0xbfc00180;
99 psxRegs.pc = 0x80000080;
102 psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) |
103 ((psxRegs.CP0.n.Status & 0xf) << 2);
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);
110 if (Config.HLE) psxBiosException();
113 void psxBranchTest() {
114 if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter)
117 if (psxRegs.interrupt) {
118 if ((psxRegs.interrupt & 0x80) && !Config.Sio) { // sio
119 if ((psxRegs.cycle - psxRegs.intCycle[7]) >= psxRegs.intCycle[7 + 1]) {
120 psxRegs.interrupt &= ~0x80;
124 if (psxRegs.interrupt & 0x04) { // cdr
125 if ((psxRegs.cycle - psxRegs.intCycle[2]) >= psxRegs.intCycle[2 + 1]) {
126 psxRegs.interrupt &= ~0x04;
130 if (psxRegs.interrupt & 0x040000) { // cdr read
131 if ((psxRegs.cycle - psxRegs.intCycle[2 + 16]) >= psxRegs.intCycle[2 + 16 + 1]) {
132 psxRegs.interrupt &= ~0x040000;
136 if (psxRegs.interrupt & 0x01000000) { // gpu dma
137 if ((psxRegs.cycle - psxRegs.intCycle[3 + 24]) >= psxRegs.intCycle[3 + 24 + 1]) {
138 psxRegs.interrupt &= ~0x01000000;
142 if (psxRegs.interrupt & 0x02000000) { // mdec out dma
143 if ((psxRegs.cycle - psxRegs.intCycle[5 + 24]) >= psxRegs.intCycle[5 + 24 + 1]) {
144 psxRegs.interrupt &= ~0x02000000;
148 if (psxRegs.interrupt & 0x04000000) { // spu dma
149 if ((psxRegs.cycle - psxRegs.intCycle[1 + 24]) >= psxRegs.intCycle[1 + 24 + 1]) {
150 psxRegs.interrupt &= ~0x04000000;
156 if (psxHu32(0x1070) & psxHu32(0x1074)) {
157 if ((psxRegs.CP0.n.Status & 0x401) == 0x401) {
159 PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074));
161 // SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074));
162 psxException(0x400, 0);
168 if (!Config.HLE && Config.PsxOut) {
169 u32 call = psxRegs.GPR.n.t1 & 0xff;
170 switch (psxRegs.pc & 0x1fffff) {
173 if (call != 0x28 && call != 0xe) {
174 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); }
181 if (call != 0x17 && call != 0xb) {
182 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); }
189 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);
198 void psxExecuteBios() {
199 while (psxRegs.pc != 0x80030000)
200 psxCpu->ExecuteBlock();