some openbios support

[pcsx_rearmed.git] / libpcsxcore / r3000a.c

diff --git a/libpcsxcore/r3000a.c b/libpcsxcore/r3000a.c
index e21d488..53a5eba 100644 (file)
--- a/libpcsxcore/r3000a.c
+++ b/libpcsxcore/r3000a.c
@@ -25,6 +25,7 @@
 #include "cdrom.h"
 #include "mdec.h"
 #include "gte.h"
+#include "psxinterpreter.h"
 
 R3000Acpu *psxCpu = NULL;
 #ifdef DRC_DISABLE
@@ -32,13 +33,14 @@ psxRegisters psxRegs;
 #endif
 
 int psxInit() {
-       SysPrintf(_("Running PCSX Version %s (%s).\n"), PACKAGE_VERSION, __DATE__);
+       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
 
@@ -59,13 +61,20 @@ void psxReset() {
        psxRegs.CP0.r[12] = 0x10900000; // COP0 enabled | BEV = 1 | TS = 1
        psxRegs.CP0.r[15] = 0x00000002; // PRevID = Revision ID, same as R3000A
 
+       psxCpu->ApplyConfig();
        psxCpu->Reset();
 
        psxHwReset();
        psxBiosInit();
 
-       if (!Config.HLE)
+       BiosLikeGPUSetup(); // a bit of a hack but whatever
+
+       BiosBooted = FALSE;
+       if (!Config.HLE) {
                psxExecuteBios();
+               if (psxRegs.pc == 0x80030000 && !Config.SlowBoot)
+                       BiosBootBypass();
+       }
 
 #ifdef EMU_LOG
        EMU_LOG("*BIOS END*\n");
@@ -74,57 +83,46 @@ void psxReset() {
 }
 
 void psxShutdown() {
-       psxMemShutdown();
        psxBiosShutdown();
 
        psxCpu->Shutdown();
+
+       psxMemShutdown();
 }
 
-void psxException(u32 code, u32 bd) {
-       #ifdef ICACHE_EMULATION
-       /* Dynarecs may use this codepath and crash as a result.
-        * This should only be used for the interpreter. - Gameblabla
-        * */
-       if (Config.icache_emulation && Config.Cpu == CPU_INTERPRETER)
-       {
-               psxRegs.code = SWAPu32(*Read_ICache(psxRegs.pc));
-       }
-       else
-       #endif
-       {
-               psxRegs.code = PSXMu32(psxRegs.pc);
-       }
+// cp0 is passed separately for lightrec to be less messy
+void psxException(u32 code, u32 bd, psxCP0Regs *cp0) {
+       psxRegs.code = PSXMu32(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);
+               psxCP2Regs *cp2 = (void *)(cp0 + 1);
+               psxCP2[psxRegs.code & 0x3f](cp2);
        }
 
        // Set the Cause
-       psxRegs.CP0.n.Cause = (psxRegs.CP0.n.Cause & 0x300) | code;
+       cp0->n.Cause = (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);
+               cp0->n.Cause |= 0x80000000;
+               cp0->n.EPC = (psxRegs.pc - 4);
        } else
-               psxRegs.CP0.n.EPC = (psxRegs.pc);
+               cp0->n.EPC = (psxRegs.pc);
 
-       if (psxRegs.CP0.n.Status & 0x400000)
+       if (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);
+       cp0->n.Status = (cp0->n.Status & ~0x3f) | ((cp0->n.Status & 0x0f) << 2);
 
        if (Config.HLE) psxBiosException();
 }
@@ -134,7 +132,7 @@ void psxBranchTest() {
                psxRcntUpdate();
 
        if (psxRegs.interrupt) {
-               if ((psxRegs.interrupt & (1 << PSXINT_SIO)) && !Config.Sio) { // sio
+               if ((psxRegs.interrupt & (1 << PSXINT_SIO))) { // sio
                        if ((psxRegs.cycle - psxRegs.intCycle[PSXINT_SIO].sCycle) >= psxRegs.intCycle[PSXINT_SIO].cycle) {
                                psxRegs.interrupt &= ~(1 << PSXINT_SIO);
                                sioInterrupt();
@@ -149,7 +147,7 @@ void psxBranchTest() {
                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();
+                               cdrPlayReadInterrupt();
                        }
                }
                if (psxRegs.interrupt & (1 << PSXINT_GPUDMA)) { // gpu dma
@@ -188,12 +186,6 @@ void psxBranchTest() {
                                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);
@@ -214,7 +206,7 @@ void psxBranchTest() {
                        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);
+                       psxException(0x400, 0, &psxRegs.CP0);
                }
        }
 }
@@ -251,7 +243,12 @@ void psxJumpTest() {
 }
 
 void psxExecuteBios() {
-       while (psxRegs.pc != 0x80030000)
+       int i;
+       for (i = 0; psxRegs.pc != 0x80030000 && i < 5000000; i++)
                psxCpu->ExecuteBlock();
+       if (psxRegs.pc == 0x80030000)
+               BiosBooted = TRUE;
+       else
+               SysPrintf("BIOS boot timeout - custom BIOS?\n");
 }