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r3000a.c
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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 02111-1307 USA. *
***************************************************************************/
/*
* R3000A CPU functions.
*/
#include "r3000a.h"
#include "psxhw.h"
#include "psxdma.h"
#include "cdrom.h"
#include "mdec.h"
R3000Acpu *psxCpu;
psxRegisters psxRegs;
int psxInit() {
if(Config.Cpu) {
if(Config.Dbg) psxCpu = &psxIntDbg;
else psxCpu = &psxInt;
}
#if defined(__x86_64__) || defined(__i386__) || defined(__sh__) || defined(__ppc__) || defined(HW_RVL) || defined(HW_DOL)
if (!Config.Cpu) psxCpu = &psxRec;
#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() {
psxMemShutdown();
psxBiosShutdown();
if (psxCpu && psxCpu->Shutdown)
{
psxCpu->Shutdown();
}
}
void psxException(u32 code, u32 bd) {
// Set the Cause
// upd xjsxjs197 start
//psxRegs.CP0.n.Cause = code;
psxRegs.CP0.n.Cause = (psxRegs.CP0.n.Cause & 0x300) | code;
// upd xjsxjs197 end
// Set the EPC & PC
if (bd) {
#ifdef PSXCPU_LOG
PSXCPU_LOG("bd set!!!\n");
#endif
//SysPrintf("bd set!!!\n");
//PRINT_LOG("=====bd set!!!");
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);
// upd xjsxjs197 start
/*if (!Config.HLE && (((SWAP32(*(u32*)PSXM(psxRegs.CP0.n.EPC)) >> 24) & 0xfe) == 0x4a)) {
// "hokuto no ken" / "Crash Bandicot 2" ... fix
PSXMu32ref(psxRegs.CP0.n.EPC)&= SWAP32(~0x02000000);
if (Config.HLE) psxBiosException();
}*/
if (Config.HLE)
{
psxBiosException();
}
else
{
// "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
u32 tmp = PSXMu32(psxRegs.CP0.n.EPC);
psxRegs.code = tmp;
if (tmp != NULL && ((tmp >> 24) & 0xfe) == 0x4a) {
#ifdef DISP_DEBUG
PRINT_LOG("========hokuto no ken Fix ");
#endif // DISP_DEBUG
PSXMu32ref(psxRegs.CP0.n.EPC) &= SWAP32(~0x02000000);
psxRegs.code = PSXMu32(psxRegs.CP0.n.EPC);
extern void (*psxCP2[64])();
psxCP2[psxRegs.code & 0x3f]();
}
#ifdef DISP_DEBUG
else if (tmp == NULL )
{
tmp = PSXMu32(psxRegs.CP0.n.EPC + 4);
if (tmp == NULL)
{
//PRINT_LOG("===psxException NULL Pointer, [EPC + 4] also NULL");
}
else
{
//PRINT_LOG1("===psxException NULL Pointer, [EPC + 4]: %x", tmp);
}
}
#endif
}
// upd xjsxjs197 end
}
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[7]) >= psxRegs.intCycle[7+1]) {
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[2]) >= psxRegs.intCycle[2+1]) {
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[2+16]) >= psxRegs.intCycle[2+16+1]) {
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[3+24]) >= psxRegs.intCycle[3+24+1]) {
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[5+24]) >= psxRegs.intCycle[5+24+1]) {
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 (psxRegs.interrupt & 0x80000000) {
// psxRegs.interrupt&=~0x80000000;
psxTestHWInts();
//}
}
// if (psxRegs.cycle > 0xd29c6500) Log=1;
}
inline void psxTestHWInts() {
// upd xjsxjs197 start
//if (psxHu32(0x1070) & psxHu32(0x1074)) {
//if (LOAD_SWAP32p(psxHAddr(0x1070)) & LOAD_SWAP32p(psxHAddr(0x1074))) {
if (*((u32*)psxHAddr(0x1070)) & *((u32*)psxHAddr(0x1074))) {
// upd xjsxjs197 end
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 ) {
psxException(0x400, 0);
}
#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();
}