diff options
Diffstat (limited to 'libpcsxcore/r3000a.c')
-rw-r--r-- | libpcsxcore/r3000a.c | 202 |
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(); +} + |