Merge pull request #4780 from booto/dcbz_hack

Hack to stop dcbz/dcbi over low MEM1 trashing memory.

Data/Sys/GameSettings/SCY.ini

@@ -2,6 +2,8 @@
 
 [Core]
 # Values set here will override the main Dolphin settings.
+MMU = 1
+LowDCBZHack = 1
 
 [EmuState]
 # The Emulation State. 1 is worst, 5 is best, 0 is not set.
@@ -17,3 +19,5 @@ EmulationIssues =
 [ActionReplay]
 # Add action replay cheats here.
 
+[Video_Settings]
+SafeTextureCacheColorSamples = 2048

Data/Sys/GameSettings/SQI.ini

@@ -0,0 +1,23 @@
+# SQIE4Q, SQIP4Q - Disney Infinity
+
+[Core]
+# Values set here will override the main Dolphin settings.
+MMU = 1
+LowDCBZHack = 1
+
+[EmuState]
+# The Emulation State. 1 is worst, 5 is best, 0 is not set.
+EmulationStateId = 3
+EmulationIssues =
+
+[OnLoad]
+# Add memory patches to be loaded once on boot here.
+
+[OnFrame]
+# Add memory patches to be applied every frame here.
+
+[ActionReplay]
+# Add action replay cheats here.
+
+[Video_Settings]
+SafeTextureCacheColorSamples = 2048

Source/Core/Core/BootManager.cpp

@@ -73,6 +73,7 @@ private:
   bool bAccurateNaNs;
   bool bMMU;
   bool bDCBZOFF;
+  bool bLowDCBZHack;
   bool m_EnableJIT;
   bool bSyncGPU;
   bool bFastDiscSpeed;
@@ -145,6 +146,7 @@ void ConfigCache::RestoreConfig(SConfig* config)
   config->bAccurateNaNs = bAccurateNaNs;
   config->bMMU = bMMU;
   config->bDCBZOFF = bDCBZOFF;
+  config->bLowDCBZHack = bLowDCBZHack;
   config->m_DSPEnableJIT = m_EnableJIT;
   config->bSyncGPU = bSyncGPU;
   config->bFastDiscSpeed = bFastDiscSpeed;
@@ -248,6 +250,7 @@ bool BootCore(const std::string& _rFilename)
     core_section->Get("AccurateNaNs", &StartUp.bAccurateNaNs, StartUp.bAccurateNaNs);
     core_section->Get("MMU", &StartUp.bMMU, StartUp.bMMU);
     core_section->Get("DCBZ", &StartUp.bDCBZOFF, StartUp.bDCBZOFF);
+    core_section->Get("LowDCBZHack", &StartUp.bLowDCBZHack, StartUp.bLowDCBZHack);
     core_section->Get("SyncGPU", &StartUp.bSyncGPU, StartUp.bSyncGPU);
     core_section->Get("FastDiscSpeed", &StartUp.bFastDiscSpeed, StartUp.bFastDiscSpeed);
     core_section->Get("DSPHLE", &StartUp.bDSPHLE, StartUp.bDSPHLE);

Source/Core/Core/ConfigManager.cpp

@@ -578,6 +578,7 @@ void SConfig::LoadCoreSettings(IniFile& ini)
   core->Get("SyncGpuOverclock", &fSyncGpuOverclock, 1.0f);
   core->Get("FastDiscSpeed", &bFastDiscSpeed, false);
   core->Get("DCBZ", &bDCBZOFF, false);
+  core->Get("LowDCBZHack", &bLowDCBZHack, false);
   core->Get("FPRF", &bFPRF, false);
   core->Get("AccurateNaNs", &bAccurateNaNs, false);
   core->Get("EmulationSpeed", &m_EmulationSpeed, 1.0f);
@@ -725,6 +726,7 @@ void SConfig::LoadDefaults()
   bAccurateNaNs = false;
   bMMU = false;
   bDCBZOFF = false;
+  bLowDCBZHack = false;
   iBBDumpPort = -1;
   bSyncGPU = false;
   bFastDiscSpeed = false;

Source/Core/Core/ConfigManager.h

@@ -106,6 +106,7 @@ struct SConfig : NonCopyable
 
   bool bMMU = false;
   bool bDCBZOFF = false;
+  bool bLowDCBZHack = false;
   int iBBDumpPort = 0;
   bool bFastDiscSpeed = false;
 

Source/Core/Core/PowerPC/Interpreter/Interpreter_LoadStore.cpp

@@ -362,11 +362,18 @@ void Interpreter::dcbtst(UGeckoInstruction inst)
 
 void Interpreter::dcbz(UGeckoInstruction inst)
 {
-  // TODO: Implement some sort of L2 emulation.
   // DCBZOFF is a hack to fix certain games which would otherwise require
   // accurate L2 emulation.
-  if (!SConfig::GetInstance().bDCBZOFF)
+  if (SConfig::GetInstance().bDCBZOFF)
-    PowerPC::ClearCacheLine(Helper_Get_EA_X(inst) & (~31));
+    return;
+
+  u32 dcbz_addr = Helper_Get_EA_X(inst);
+  // Hack to stop dcbz/dcbi over low MEM1 trashing memory.
+  if (SConfig::GetInstance().bLowDCBZHack && (dcbz_addr < 0x80008000) && (dcbz_addr >= 0x80000000))
+    return;
+
+  // TODO: Implement some sort of L2 emulation.
+  PowerPC::ClearCacheLine(dcbz_addr & (~31));
 }
 
 // eciwx/ecowx technically should access the specified device

Source/Core/Core/PowerPC/Jit64/Jit_LoadStore.cpp

@@ -330,6 +330,7 @@ void Jit64::dcbz(UGeckoInstruction inst)
   JITDISABLE(bJITLoadStoreOff);
   if (SConfig::GetInstance().bDCBZOFF)
     return;
+  FALLBACK_IF(SConfig::GetInstance().bLowDCBZHack);
 
   int a = inst.RA;
   int b = inst.RB;