pcsxr-1.9.92

1 files changed, 202 insertions, 0 deletions

diff --git a/libpcsxcore/r3000a.c b/libpcsxcore/r3000a.c
new file mode 100644
index 0000000..8c6289e
--- /dev/null
+++ b/libpcsxcore/r3000a.c
@@ -0,0 +1,202 @@
+/***************************************************************************
+ *   Copyright (C) 2007 Ryan Schultz, PCSX-df Team, 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.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA.           *
+ ***************************************************************************/
+
+/*
+* R3000A CPU functions.
+*/
+
+#include "r3000a.h"
+#include "cdrom.h"
+#include "mdec.h"
+#include "gte.h"
+
+R3000Acpu *psxCpu = NULL;
+psxRegisters psxRegs;
+
+int psxInit() {
+	SysPrintf(_("Running PCSX Version %s (%s).\n"), PACKAGE_VERSION, __DATE__);
+
+#ifdef PSXREC
+	if (Config.Cpu == CPU_INTERPRETER) {
+		psxCpu = &psxInt;
+	} else psxCpu = &psxRec;
+#else
+	psxCpu = &psxInt;
+#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 EMU_LOG
+	EMU_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;
+
+	// Set the EPC & PC
+	if (bd) {
+#ifdef PSXCPU_LOG
+		PSXCPU_LOG("bd set!!!\n");
+#endif
+		SysPrintf("bd set!!!\n");
+		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
+		PSXMu32ref(psxRegs.CP0.n.EPC)&= SWAPu32(~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 (psxRegs.interrupt & 0x01000000) { // gpu dma
+			if ((psxRegs.cycle - psxRegs.intCycle[3 + 24]) >= psxRegs.intCycle[3 + 24 + 1]) {
+				psxRegs.interrupt &= ~0x01000000;
+				gpuInterrupt();
+			}
+		}
+		if (psxRegs.interrupt & 0x02000000) { // mdec out dma
+			if ((psxRegs.cycle - psxRegs.intCycle[5 + 24]) >= psxRegs.intCycle[5 + 24 + 1]) {
+				psxRegs.interrupt &= ~0x02000000;
+				mdec1Interrupt();
+			}
+		}
+		if (psxRegs.interrupt & 0x04000000) { // spu dma
+			if ((psxRegs.cycle - psxRegs.intCycle[1 + 24]) >= psxRegs.intCycle[1 + 24 + 1]) {
+				psxRegs.interrupt &= ~0x04000000;
+				spuInterrupt();
+			}
+		}
+	}
+
+	if (psxHu32(0x1070) & psxHu32(0x1074)) {
+		if ((psxRegs.CP0.n.Status & 0x401) == 0x401) {
+#ifdef PSXCPU_LOG
+			PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074));
+#endif
+//			SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074));
+			psxException(0x400, 0);
+		}
+	}
+}
+
+void psxJumpTest() {
+	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();
+}
+