[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"
#include "psxinterpreter.h"

R3000Acpu *psxCpu = NULL;
#ifdef DRC_DISABLE
psxRegisters psxRegs;
#endif

int psxInit() {
	SysPrintf(_("Running PCSX Version %s (%s).\n"), PCSX_VERSION, __DATE__);

#ifndef DRC_DISABLE
	if (Config.Cpu == CPU_INTERPRETER) {
		psxCpu = &psxInt;
	} else psxCpu = &psxRec;
#else
	Config.Cpu = CPU_INTERPRETER;
	psxCpu = &psxInt;
#endif

	Log = 0;

	if (psxMemInit() == -1) return -1;

	return psxCpu->Init();
}

void psxReset() {
	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

	psxCpu->Reset();

	psxHwReset();
	psxBiosInit();

	if (!Config.HLE)
		psxExecuteBios();

#ifdef EMU_LOG
	EMU_LOG("*BIOS END*\n");
#endif
	Log = 0;
}

void psxShutdown() {
	psxBiosShutdown();

	psxCpu->Shutdown();

	psxMemShutdown();
}

void psxException(u32 code, u32 bd) {
	psxRegs.code = fetch(psxRegs.pc);
	
	if (!Config.HLE && ((((psxRegs.code) >> 24) & 0xfe) == 0x4a)) {
		// "hokuto no ken" / "Crash Bandicot 2" ...
		// BIOS does not allow to return to GTE instructions
		// (just skips it, supposedly because it's scheduled already)
		// so we execute it here
		extern void (*psxCP2[64])(void *cp2regs);
		psxCP2[psxRegs.code & 0x3f](&psxRegs.CP2D);
	}

	// Set the Cause
	psxRegs.CP0.n.Cause = (psxRegs.CP0.n.Cause & 0x300) | code;

	// Set the EPC & PC
	if (bd) {
#ifdef PSXCPU_LOG
		PSXCPU_LOG("bd set!!!\n");
#endif
		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) 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 (psxRegs.interrupt & (1 << PSXINT_CDRDMA)) { // cdrom
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRDMA].sCycle) >= psxRegs.intCycle[PSXINT_CDRDMA].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_CDRDMA);
				cdrDmaInterrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_CDRPLAY)) { // cdr play timing
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRPLAY].sCycle) >= psxRegs.intCycle[PSXINT_CDRPLAY].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_CDRPLAY);
				cdrPlayInterrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_CDRLID)) { // cdr lid states
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRLID].sCycle) >= psxRegs.intCycle[PSXINT_CDRLID].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_CDRLID);
				cdrLidSeekInterrupt();
			}
		}
		if (psxRegs.interrupt & (1 << PSXINT_SPU_UPDATE)) { // scheduled spu update
			if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPU_UPDATE].sCycle) >= psxRegs.intCycle[PSXINT_SPU_UPDATE].cycle) {
				psxRegs.interrupt &= ~(1 << PSXINT_SPU_UPDATE);
				spuUpdate();
			}
		}
	}

	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"
630b122b	28	#include "psxinterpreter.h"
ef79bbde P	29
ef79bbde P	30	R3000Acpu *psxCpu = NULL;
630b122b	31	#ifdef DRC_DISABLE
93c9e42a	32	psxRegisters psxRegs;
1a32b0f8	33	#endif
ef79bbde P	34
ef79bbde P	35	int psxInit() {
202b29d4	36	SysPrintf(_("Running PCSX Version %s (%s).\n"), PCSX_VERSION, __DATE__);
ef79bbde	37
630b122b	38	#ifndef DRC_DISABLE
ef79bbde P	39	if (Config.Cpu == CPU_INTERPRETER) {
	40	psxCpu = &psxInt;
	41	} else psxCpu = &psxRec;
	42	#else
630b122b	43	Config.Cpu = CPU_INTERPRETER;
ef79bbde P	44	psxCpu = &psxInt;
	45	#endif
	46
	47	Log = 0;
	48
	49	if (psxMemInit() == -1) return -1;
	50
	51	return psxCpu->Init();
	52	}
	53
	54	void psxReset() {
ef79bbde P	55	psxMemReset();
ef79bbde P	56
630b122b	57	memset(&psxRegs, 0, sizeof(psxRegs));
630b122b	58
ef79bbde P	59	psxRegs.pc = 0xbfc00000; // Start in bootstrap
	60
	61	psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled \| BEV = 1 \| TS = 1
	62	psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A
	63
c24732c0	64	psxCpu->Reset();
c24732c0	65
ef79bbde P	66	psxHwReset();
	67	psxBiosInit();
	68
	69	if (!Config.HLE)
	70	psxExecuteBios();
	71
	72	#ifdef EMU_LOG
	73	EMU_LOG("BIOS END\n");
	74	#endif
	75	Log = 0;
	76	}
	77
	78	void psxShutdown() {
ef79bbde P	79	psxBiosShutdown();
	80
	81	psxCpu->Shutdown();
479d58cf PC	82
479d58cf PC	83	psxMemShutdown();
ef79bbde P	84	}
	85
	86	void psxException(u32 code, u32 bd) {
630b122b	87	psxRegs.code = fetch(psxRegs.pc);
630b122b	88
7a811716	89	if (!Config.HLE && ((((psxRegs.code) >> 24) & 0xfe) == 0x4a)) {
665e364a	90	// "hokuto no ken" / "Crash Bandicot 2" ...
	91	// BIOS does not allow to return to GTE instructions
	92	// (just skips it, supposedly because it's scheduled already)
62656449	93	// so we execute it here
	94	extern void (psxCP2[64])(void cp2regs);
	95	psxCP2[psxRegs.code & 0x3f](&psxRegs.CP2D);
665e364a	96	}
665e364a	97
ef79bbde	98	// Set the Cause
48e74ef5	99	psxRegs.CP0.n.Cause = (psxRegs.CP0.n.Cause & 0x300) \| code;
ef79bbde P	100
	101	// Set the EPC & PC
	102	if (bd) {
	103	#ifdef PSXCPU_LOG
	104	PSXCPU_LOG("bd set!!!\n");
	105	#endif
ef79bbde P	106	psxRegs.CP0.n.Cause \|= 0x80000000;
	107	psxRegs.CP0.n.EPC = (psxRegs.pc - 4);
	108	} else
	109	psxRegs.CP0.n.EPC = (psxRegs.pc);
	110
	111	if (psxRegs.CP0.n.Status & 0x400000)
	112	psxRegs.pc = 0xbfc00180;
	113	else
	114	psxRegs.pc = 0x80000080;
	115
	116	// Set the Status
	117	psxRegs.CP0.n.Status = (psxRegs.CP0.n.Status &~0x3f) \|
	118	((psxRegs.CP0.n.Status & 0xf) << 2);
	119
ef79bbde P	120	if (Config.HLE) psxBiosException();
	121	}
	122
	123	void psxBranchTest() {
	124	if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter)
	125	psxRcntUpdate();
	126
	127	if (psxRegs.interrupt) {
d28b54b1	128	if ((psxRegs.interrupt & (1 << PSXINT_SIO)) && !Config.Sio) { // sio
	129	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) {
	130	psxRegs.interrupt &= ~(1 << PSXINT_SIO);
ef79bbde P	131	sioInterrupt();
	132	}
	133	}
d28b54b1	134	if (psxRegs.interrupt & (1 << PSXINT_CDR)) { // cdr
	135	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDR].sCycle) >= psxRegs.intCycle[PSXINT_CDR].cycle) {
	136	psxRegs.interrupt &= ~(1 << PSXINT_CDR);
ef79bbde P	137	cdrInterrupt();
	138	}
	139	}
d28b54b1	140	if (psxRegs.interrupt & (1 << PSXINT_CDREAD)) { // cdr read
	141	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDREAD].sCycle) >= psxRegs.intCycle[PSXINT_CDREAD].cycle) {
	142	psxRegs.interrupt &= ~(1 << PSXINT_CDREAD);
ef79bbde P	143	cdrReadInterrupt();
	144	}
	145	}
d28b54b1	146	if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma
	147	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUDMA].cycle) {
	148	psxRegs.interrupt &= ~(1 << PSXINT_GPUDMA);
ef79bbde P	149	gpuInterrupt();
	150	}
	151	}
d28b54b1	152	if (psxRegs.interrupt & (1 << PSXINT_MDECOUTDMA)) { // mdec out dma
	153	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECOUTDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECOUTDMA].cycle) {
	154	psxRegs.interrupt &= ~(1 << PSXINT_MDECOUTDMA);
ef79bbde P	155	mdec1Interrupt();
	156	}
	157	}
d28b54b1	158	if (psxRegs.interrupt & (1 << PSXINT_SPUDMA)) { // spu dma
	159	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUDMA].sCycle) >= psxRegs.intCycle[PSXINT_SPUDMA].cycle) {
	160	psxRegs.interrupt &= ~(1 << PSXINT_SPUDMA);
ef79bbde P	161	spuInterrupt();
	162	}
	163	}
528ad661	164	if (psxRegs.interrupt & (1 << PSXINT_MDECINDMA)) { // mdec in
	165	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_MDECINDMA].sCycle) >= psxRegs.intCycle[PSXINT_MDECINDMA].cycle) {
	166	psxRegs.interrupt &= ~(1 << PSXINT_MDECINDMA);
	167	mdec0Interrupt();
	168	}
	169	}
57a757ce	170	if (psxRegs.interrupt & (1 << PSXINT_GPUOTCDMA)) { // gpu otc
	171	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_GPUOTCDMA].sCycle) >= psxRegs.intCycle[PSXINT_GPUOTCDMA].cycle) {
	172	psxRegs.interrupt &= ~(1 << PSXINT_GPUOTCDMA);
	173	gpuotcInterrupt();
	174	}
	175	}
9f8b032d	176	if (psxRegs.interrupt & (1 << PSXINT_CDRDMA)) { // cdrom
	177	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRDMA].sCycle) >= psxRegs.intCycle[PSXINT_CDRDMA].cycle) {
	178	psxRegs.interrupt &= ~(1 << PSXINT_CDRDMA);
	179	cdrDmaInterrupt();
	180	}
	181	}
7f457614	182	if (psxRegs.interrupt & (1 << PSXINT_CDRPLAY)) { // cdr play timing
	183	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRPLAY].sCycle) >= psxRegs.intCycle[PSXINT_CDRPLAY].cycle) {
	184	psxRegs.interrupt &= ~(1 << PSXINT_CDRPLAY);
	185	cdrPlayInterrupt();
	186	}
	187	}
9f8b032d	188	if (psxRegs.interrupt & (1 << PSXINT_CDRLID)) { // cdr lid states
	189	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRLID].sCycle) >= psxRegs.intCycle[PSXINT_CDRLID].cycle) {
	190	psxRegs.interrupt &= ~(1 << PSXINT_CDRLID);
	191	cdrLidSeekInterrupt();
	192	}
	193	}
2b30c129	194	if (psxRegs.interrupt & (1 << PSXINT_SPU_UPDATE)) { // scheduled spu update
	195	if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SPU_UPDATE].sCycle) >= psxRegs.intCycle[PSXINT_SPU_UPDATE].cycle) {
	196	psxRegs.interrupt &= ~(1 << PSXINT_SPU_UPDATE);
	197	spuUpdate();
	198	}
	199	}
ef79bbde P	200	}
	201
	202	if (psxHu32(0x1070) & psxHu32(0x1074)) {
	203	if ((psxRegs.CP0.n.Status & 0x401) == 0x401) {
	204	#ifdef PSXCPU_LOG
	205	PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074));
	206	#endif
	207	// SysPrintf("Interrupt (%x): %x %x\n", psxRegs.cycle, psxHu32(0x1070), psxHu32(0x1074));
	208	psxException(0x400, 0);
	209	}
	210	}
	211	}
	212
	213	void psxJumpTest() {
	214	if (!Config.HLE && Config.PsxOut) {
	215	u32 call = psxRegs.GPR.n.t1 & 0xff;
	216	switch (psxRegs.pc & 0x1fffff) {
	217	case 0xa0:
	218	#ifdef PSXBIOS_LOG
	219	if (call != 0x28 && call != 0xe) {
	220	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); }
	221	#endif
	222	if (biosA0[call])
	223	biosA0[call]();
	224	break;
	225	case 0xb0:
	226	#ifdef PSXBIOS_LOG
	227	if (call != 0x17 && call != 0xb) {
	228	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); }
	229	#endif
	230	if (biosB0[call])
	231	biosB0[call]();
	232	break;
	233	case 0xc0:
	234	#ifdef PSXBIOS_LOG
	235	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);
	236	#endif
	237	if (biosC0[call])
	238	biosC0[call]();
	239	break;
	240	}
	241	}
	242	}
	243
	244	void psxExecuteBios() {
	245	while (psxRegs.pc != 0x80030000)
	246	psxCpu->ExecuteBlock();
	247	}
	248