[pcsx_rearmed.git] / libpcsxcore / r3000a.c

/***************************************************************************
 *   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 & (1 << PSXINT_SIO)) && !Config.Sio) { // sio
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_SIO);
				sioInterrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_CDR)) { // cdr
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDR].sCycle) >= psxRegs.intCycle[PSXINT_CDR].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_CDR);
				cdrInterrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_CDREAD)) { // cdr read
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDREAD].sCycle) >= psxRegs.intCycle[PSXINT_CDREAD].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_CDREAD);
				cdrReadInterrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUDMA].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_GPUDMA);
				gpuInterrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_MDECOUTDMA)) { // mdec out dma
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECOUTDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECOUTDMA].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_MDECOUTDMA);
				mdec1Interrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_SPUDMA)) { // spu dma
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_SPUDMA].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_SPUDMA);
				spuInterrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_MDECINDMA)) { // mdec in
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECINDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECINDMA].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_MDECINDMA);
				mdec0Interrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_GPUOTCDMA)) { // gpu otc
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUOTCDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUOTCDMA].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_GPUOTCDMA);
				gpuotcInterrupt();
			}
		}
	}

	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();
}
Commit	Line	Data
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"
	28
	29	R3000Acpu *psxCpu = NULL;
	30	psxRegisters psxRegs;
	31
	32	int psxInit() {
	33	SysPrintf(_("Running PCSX Version %s (%s).\n"), PACKAGE_VERSION, __DATE__);
	34
	35	#ifdef PSXREC
	36	if (Config.Cpu == CPU_INTERPRETER) {
	37	psxCpu = &psxInt;
	38	} else psxCpu = &psxRec;
	39	#else
	40	psxCpu = &psxInt;
	41	#endif
	42
	43	Log = 0;
	44
	45	if (psxMemInit() == -1) return -1;
	46
	47	return psxCpu->Init();
	48	}
	49
	50	void psxReset() {
	51	psxCpu->Reset();
	52
	53	psxMemReset();
	54
	55	memset(&psxRegs, 0, sizeof(psxRegs));
	56
	57	psxRegs.pc = 0xbfc00000; // Start in bootstrap
	58
	59	psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled \| BEV = 1 \| TS = 1
	60	psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A
	61
	62	psxHwReset();
	63	psxBiosInit();
	64
65	if (!Config.HLE)
66	psxExecuteBios();
67
68	#ifdef EMU_LOG
69	EMU_LOG("BIOS END\n");
70	#endif
71	Log = 0;
72	}
73
74	void psxShutdown() {
75	psxMemShutdown();
76	psxBiosShutdown();
77
78	psxCpu->Shutdown();
79	}
80
81	void psxException(u32 code, u32 bd) {
82	// Set the Cause
83	psxRegs.CP0.n.Cause = code;
84
85	// Set the EPC & PC
86	if (bd) {
87	#ifdef PSXCPU_LOG
88	PSXCPU_LOG("bd set!!!\n");
89	#endif
90	SysPrintf("bd set!!!\n");
91	psxRegs.CP0.n.Cause \|= 0x80000000;
92	psxRegs.CP0.n.EPC = (psxRegs.pc - 4);
93	} else
94	psxRegs.CP0.n.EPC = (psxRegs.pc);
95
96	if (psxRegs.CP0.n.Status & 0x400000)
97	psxRegs.pc = 0xbfc00180;
98	else
99	psxRegs.pc = 0x80000080;
100
101	// Set the Status
102	psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) \|
103	((psxRegs.CP0.n.Status & 0xf) << 2);
104
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);
108	}
109
110	if (Config.HLE) psxBiosException();
111	}
112
113	void psxBranchTest() {
114	if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter)
115	psxRcntUpdate();
116
117	if (psxRegs.interrupt) {
d28b54b1	118	if ((psxRegs.interrupt & (1 << PSXINT_SIO)) && !Config.Sio) { // sio
	119	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) {
	120	psxRegs.interrupt &= ~(1 << PSXINT_SIO);
ef79bbde P	121	sioInterrupt();
	122	}
	123	}
d28b54b1	124	if (psxRegs.interrupt & (1 << PSXINT_CDR)) { // cdr
	125	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDR].sCycle) >= psxRegs.intCycle[PSXINT_CDR].cycle) {
	126	psxRegs.interrupt &= ~(1 << PSXINT_CDR);
ef79bbde P	127	cdrInterrupt();
	128	}
	129	}
d28b54b1	130	if (psxRegs.interrupt & (1 << PSXINT_CDREAD)) { // cdr read
	131	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDREAD].sCycle) >= psxRegs.intCycle[PSXINT_CDREAD].cycle) {
	132	psxRegs.interrupt &= ~(1 << PSXINT_CDREAD);
ef79bbde P	133	cdrReadInterrupt();
	134	}
	135	}
d28b54b1	136	if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma
	137	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUDMA].cycle) {
	138	psxRegs.interrupt &= ~(1 << PSXINT_GPUDMA);
ef79bbde P	139	gpuInterrupt();
	140	}
	141	}
d28b54b1	142	if (psxRegs.interrupt & (1 << PSXINT_MDECOUTDMA)) { // mdec out dma
	143	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECOUTDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECOUTDMA].cycle) {
	144	psxRegs.interrupt &= ~(1 << PSXINT_MDECOUTDMA);
ef79bbde P	145	mdec1Interrupt();
	146	}
	147	}
d28b54b1	148	if (psxRegs.interrupt & (1 << PSXINT_SPUDMA)) { // spu dma
	149	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_SPUDMA].cycle) {
	150	psxRegs.interrupt &= ~(1 << PSXINT_SPUDMA);
ef79bbde P	151	spuInterrupt();
	152	}
	153	}
528ad661	154	if (psxRegs.interrupt & (1 << PSXINT_MDECINDMA)) { // mdec in
	155	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECINDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECINDMA].cycle) {
	156	psxRegs.interrupt &= ~(1 << PSXINT_MDECINDMA);
	157	mdec0Interrupt();
	158	}
	159	}
57a757ce	160	if (psxRegs.interrupt & (1 << PSXINT_GPUOTCDMA)) { // gpu otc
	161	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUOTCDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUOTCDMA].cycle) {
	162	psxRegs.interrupt &= ~(1 << PSXINT_GPUOTCDMA);
	163	gpuotcInterrupt();
	164	}
	165	}
ef79bbde P	166	}
	167
	168	if (psxHu32(0x1070) & psxHu32(0x1074)) {
	169	if ((psxRegs.CP0.n.Status & 0x401) == 0x401) {
	170	#ifdef PSXCPU_LOG
	171	PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074));
	172	#endif
	173	// SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074));
	174	psxException(0x400, 0);
	175	}
	176	}
	177	}
	178
	179	void psxJumpTest() {
	180	if (!Config.HLE && Config.PsxOut) {
	181	u32 call = psxRegs.GPR.n.t1 & 0xff;
	182	switch (psxRegs.pc & 0x1fffff) {
	183	case 0xa0:
	184	#ifdef PSXBIOS_LOG
	185	if (call != 0x28 && call != 0xe) {
	186	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); }
	187	#endif
	188	if (biosA0[call])
	189	biosA0[call]();
	190	break;
	191	case 0xb0:
	192	#ifdef PSXBIOS_LOG
	193	if (call != 0x17 && call != 0xb) {
	194	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); }
	195	#endif
	196	if (biosB0[call])
	197	biosB0[call]();
	198	break;
	199	case 0xc0:
	200	#ifdef PSXBIOS_LOG
	201	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);
	202	#endif
	203	if (biosC0[call])
	204	biosC0[call]();
	205	break;
	206	}
	207	}
	208	}
	209
	210	void psxExecuteBios() {
	211	while (psxRegs.pc != 0x80030000)
	212	psxCpu->ExecuteBlock();
	213	}
	214