diff options
Diffstat (limited to 'PcsxSrc/R3000A.c')
| -rw-r--r-- | PcsxSrc/R3000A.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/PcsxSrc/R3000A.c b/PcsxSrc/R3000A.c new file mode 100644 index 0000000..ab6aea2 --- /dev/null +++ b/PcsxSrc/R3000A.c @@ -0,0 +1,168 @@ +/* Pcsx - Pc Psx Emulator
+ * Copyright (C) 1999-2002 Pcsx Team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "PsxCommon.h"
+
+int psxInit() {
+
+ if (Config.Cpu) psxCpu = &psxInt;
+#ifdef __i386__
+ else psxCpu = &psxRec;
+#endif
+ Log=0;
+
+ if (psxMemInit() == -1) return -1;
+
+ return psxCpu->Init();
+}
+
+void psxReset() {
+
+ psxCpu->Reset();
+
+ psxMemReset();
+
+ memset(&psxRegs, 0, sizeof(psxRegs));
+
+ psxRegs.pc = 0xbfc00000; // Start in bootstrap
+
+ psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled | BEV = 1 | TS = 1
+ psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A
+
+ psxHwReset();
+ psxBiosInit();
+
+ if (!Config.HLE) psxExecuteBios();
+
+#ifdef PSX_LOG
+ PSX_LOG("*BIOS END*\n");
+#endif
+ Log=0;
+}
+
+void psxShutdown() {
+ psxMemShutdown();
+ psxBiosShutdown();
+
+ psxCpu->Shutdown();
+}
+
+void psxException(u32 code, u32 bd) {
+ // Set the Cause
+ psxRegs.CP0.n.Cause = code;
+
+#ifdef PSXCPU_LOG
+ if (bd) PSXCPU_LOG("bd set\n");
+#endif
+ // Set the EPC & PC
+ if (bd) {
+ psxRegs.CP0.n.Cause|= 0x80000000;
+ psxRegs.CP0.n.EPC = (psxRegs.pc - 4);
+ } else
+ psxRegs.CP0.n.EPC = (psxRegs.pc);
+
+ if (psxRegs.CP0.n.Status & 0x400000)
+ psxRegs.pc = 0xbfc00180;
+ else
+ psxRegs.pc = 0x80000080;
+
+ // Set the Status
+ psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) |
+ ((psxRegs.CP0.n.Status & 0xf) << 2);
+
+ if (!Config.HLE && (((PSXMu32(psxRegs.CP0.n.EPC) >> 24) & 0xfe) == 0x4a)) {
+ // "hokuto no ken" / "Crash Bandicot 2" ... fix
+ PSXMu32(psxRegs.CP0.n.EPC)&= ~0x02000000;
+ }
+
+ if (Config.HLE) psxBiosException();
+}
+
+void psxBranchTest() {
+ if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter)
+ psxRcntUpdate();
+
+ if (psxRegs.interrupt) {
+ if ((psxRegs.interrupt & 0x80) && (!Config.Sio)) { // sio
+ if ((psxRegs.cycle - psxRegs.intCycle[7]) >= psxRegs.intCycle[7+1]) {
+ psxRegs.interrupt&=~0x80;
+ sioInterrupt();
+ }
+ }
+ if (psxRegs.interrupt & 0x04) { // cdr
+ if ((psxRegs.cycle - psxRegs.intCycle[2]) >= psxRegs.intCycle[2+1]) {
+ psxRegs.interrupt&=~0x04;
+ cdrInterrupt();
+ }
+ }
+ if (psxRegs.interrupt & 0x040000) { // cdr read
+ if ((psxRegs.cycle - psxRegs.intCycle[2+16]) >= psxRegs.intCycle[2+16+1]) {
+ psxRegs.interrupt&=~0x040000;
+ cdrReadInterrupt();
+ }
+ }
+ }
+
+ if (psxHu32(0x1070) & psxHu32(0x1074)) {
+ if ((psxRegs.CP0.n.Status & 0x401) == 0x401) {
+#ifdef PSXCPU_LOG
+// PSXCPU_LOG("Interrupt: %x %x\n", HWMu32(0x1070), HWMu32(0x1074));
+#endif
+ psxException(0x400, 0);
+ }
+ }
+
+ if (!Config.HLE && Config.PsxOut) {
+ u32 call = psxRegs.GPR.n.t1 & 0xff;
+ switch (psxRegs.pc & 0x1fffff) {
+ case 0xa0:
+#ifdef PSXBIOS_LOG
+ if (call != 0x28 && call != 0xe) {
+ 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); }
+#endif
+ if (biosA0[call])
+ biosA0[call]();
+ break;
+ case 0xb0:
+#ifdef PSXBIOS_LOG
+ if (call != 0x17 && call != 0xb) {
+ 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); }
+#endif
+ if (biosB0[call])
+ biosB0[call]();
+ break;
+ case 0xc0:
+#ifdef PSXBIOS_LOG
+ 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);
+#endif
+ if (biosC0[call])
+ biosC0[call]();
+ break;
+ }
+ }
+}
+
+void psxExecuteBios() {
+ while (psxRegs.pc != 0x80030000)
+ psxCpu->ExecuteBlock();
+}
+
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