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pcsxr/libpcsxcore/r3000a.c

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/***************************************************************************
* 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 02110-1301 USA. *
***************************************************************************/
/*
* R3000A CPU functions.
*/
#include "r3000a.h"
#include "cdrom.h"
#include "mdec.h"
#include "gpu.h"
#include "gte.h"
#include "pgxp_mem.h"
R3000Acpu *psxCpu = NULL;
psxRegisters psxRegs;
int psxInit() {
SysPrintf(_("Running PCSXR 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;
PGXP_Init();
PauseDebugger();
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) psxBiosException();
}
void psxBranchTest() {
// GameShark Sampler: Give VSync pin some delay before exception eats it
if (psxHu32(0x1070) & psxHu32(0x1074)) {
if ((psxRegs.CP0.n.Status & 0x401) == 0x401) {
u32 opcode;
// Crash Bandicoot 2: Don't run exceptions when GTE in pipeline
opcode = SWAP32(*Read_ICache(psxRegs.pc, TRUE));
if( ((opcode >> 24) & 0xfe) != 0x4a ) {
#ifdef PSXCPU_LOG
PSXCPU_LOG("Interrupt: %x %x\n", psxHu32(0x1070), psxHu32(0x1074));
#endif
psxException(0x400, 0);
}
}
}
#if 0
if( SPU_async )
{
static int init;
int elapsed;
if( init == 0 ) {
// 10 apu cycles
// - Final Fantasy Tactics (distorted - dropped sound effects)
psxRegs.intCycle[PSXINT_SPUASYNC].cycle = PSXCLK / 44100 * 10;
init = 1;
}
elapsed = psxRegs.cycle - psxRegs.intCycle[PSXINT_SPUASYNC].sCycle;
if (elapsed >= psxRegs.intCycle[PSXINT_SPUASYNC].cycle) {
SPU_async( elapsed );
psxRegs.intCycle[PSXINT_SPUASYNC].sCycle = psxRegs.cycle;
}
}
#endif
if ((psxRegs.cycle - psxNextsCounter) >= psxNextCounter)
psxRcntUpdate();
if (psxRegs.interrupt) {
if ((psxRegs.interrupt & (1 << PSXINT_SIO)) && !Config.SioIrq) { // 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_CDRDBUF)) { // cdr decoded buffer
if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_CDRDBUF].sCycle) >= psxRegs.intCycle[PSXINT_CDRDBUF].cycle) {
psxRegs.interrupt &= ~(1 << PSXINT_CDRDBUF);
cdrDecodedBufferInterrupt();
}
}
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();
}
}
}
}
void psxJumpTest() {
if (!Config.HLE && Config.PsxOut) {
u32 call = psxRegs.GPR.n.t1 & 0xff;
switch (psxRegs.pc & 0x1fffff) {
case 0xa0:
if (biosA0[call])
biosA0[call]();
else if (call != 0x28 && call != 0xe) {
#ifdef PSXBIOS_LOG
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
}
break;
case 0xb0:
if (biosB0[call])
biosB0[call]();
else if (call != 0x17 && call != 0xb) {
#ifdef PSXBIOS_LOG
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
}
break;
case 0xc0:
if (biosC0[call])
biosC0[call]();
else {
#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
}
break;
}
}
}
void psxExecuteBios() {
while (psxRegs.pc != 0x80030000)
psxCpu->ExecuteBlock();
}
void psxSetPGXPMode(u32 pgxpMode)
{
psxCpu->SetPGXPMode(pgxpMode);
//psxCpu->Reset();
}
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