Merge pull request #14665 from cristian64/simulated_memory_size

Core: Adjust emulated memory size automatically.

16 files changed, 70 insertions, 17 deletions

diff --git a/Source/Android/app/src/main/res/values/strings.xml b/Source/Android/app/src/main/res/values/strings.xml
index 07c5e7ebc0..9d97169d95 100644
--- a/Source/Android/app/src/main/res/values/strings.xml
+++ b/Source/Android/app/src/main/res/values/strings.xml
@@ -400,7 +400,7 @@
     <string name="overclock_title_description">Adjusts the emulated CPU\'s clock rate if \"Override Emulated CPU Clock Speed\" is enabled.</string>
     <string name="memory_override">Memory Override</string>
     <string name="enable_memory_size_override">Enable Emulated Memory Size Override</string>
-    <string name="enable_memory_size_override_description">Adjusts the amount of RAM in the emulated console.\n\nWARNING: Enabling this will completely break many games. Only a small number of games can benefit from this.</string>
+    <string name="enable_memory_size_override_description">Sets the amount of RAM in the emulated console to the values provided.\n\nWARNING: Enabling this will completely break many games. By default, Dolphin determines what value is required based on the game information.</string>
     <string name="main_mem1_size">MEM1 Size</string>
     <string name="main_mem2_size">MEM2 Size</string>
     <string name="gpu_options">GPU Options</string>
diff --git a/Source/Core/Core/ConfigManager.cpp b/Source/Core/Core/ConfigManager.cpp
index 8404cfff07..460ca2e048 100644
--- a/Source/Core/Core/ConfigManager.cpp
+++ b/Source/Core/Core/ConfigManager.cpp
@@ -154,27 +154,35 @@ u16 SConfig::GetRevision() const
   return m_revision;
 }
 
+u32 SConfig::GetSimulatedMemorySize() const
+{
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
+  return m_simulated_memory_size;
+}
+
 void SConfig::ResetRunningGameMetadata()
 {
   std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
-  SetRunningGameMetadata("00000000", "", 0, 0, DiscIO::Region::Unknown);
+  SetRunningGameMetadata("00000000", "", 0, 0, DiscIO::Region::Unknown, 0);
 }
 
 void SConfig::SetRunningGameMetadata(const DiscIO::Volume& volume,
                                      const DiscIO::Partition& partition)
 {
   std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
+
   if (partition == volume.GetGamePartition())
   {
     SetRunningGameMetadata(volume.GetGameID(), volume.GetGameTDBID(),
                            volume.GetTitleID().value_or(0), volume.GetRevision().value_or(0),
-                           volume.GetRegion());
+                           volume.GetRegion(), volume.GetSimulatedMemorySize());
   }
   else
   {
     SetRunningGameMetadata(volume.GetGameID(partition), volume.GetGameTDBID(partition),
                            volume.GetTitleID(partition).value_or(0),
-                           volume.GetRevision(partition).value_or(0), volume.GetRegion());
+                           volume.GetRevision(partition).value_or(0), volume.GetRegion(),
+                           volume.GetSimulatedMemorySize());
   }
 }
 
@@ -192,26 +200,29 @@ void SConfig::SetRunningGameMetadata(const IOS::ES::TMDReader& tmd, DiscIO::Plat
   {
     // If not launching a disc game, just read everything from the TMD.
     SetRunningGameMetadata(tmd.GetGameID(), tmd.GetGameTDBID(), tmd_title_id, tmd.GetTitleVersion(),
-                           tmd.GetRegion());
+                           tmd.GetRegion(), 0);
   }
 }
 
 void SConfig::SetRunningGameMetadata(const std::string& game_id)
 {
   std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
-  SetRunningGameMetadata(game_id, "", 0, 0, DiscIO::Region::Unknown);
+  SetRunningGameMetadata(game_id, "", 0, 0, DiscIO::Region::Unknown, 0);
 }
 
 void SConfig::SetRunningGameMetadata(const std::string& game_id, const std::string& gametdb_id,
-                                     u64 title_id, u16 revision, DiscIO::Region region)
+                                     u64 title_id, u16 revision, DiscIO::Region region,
+                                     u32 simulated_memory_size)
 {
   std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
   const bool was_changed = m_game_id != game_id || m_gametdb_id != gametdb_id ||
-                           m_title_id != title_id || m_revision != revision;
+                           m_title_id != title_id || m_revision != revision ||
+                           m_simulated_memory_size != simulated_memory_size;
   m_game_id = game_id;
   m_gametdb_id = gametdb_id;
   m_title_id = title_id;
   m_revision = revision;
+  m_simulated_memory_size = simulated_memory_size;
 
   if (game_id.length() == 6)
   {
diff --git a/Source/Core/Core/ConfigManager.h b/Source/Core/Core/ConfigManager.h
index 39dbc6d39a..145b002418 100644
--- a/Source/Core/Core/ConfigManager.h
+++ b/Source/Core/Core/ConfigManager.h
@@ -65,6 +65,7 @@ struct SConfig
   const std::string GetTitleDescription() const;
   u64 GetTitleID() const;
   u16 GetRevision() const;
+  u32 GetSimulatedMemorySize() const;
   void ResetRunningGameMetadata();
   void SetRunningGameMetadata(const DiscIO::Volume& volume, const DiscIO::Partition& partition);
   void SetRunningGameMetadata(const IOS::ES::TMDReader& tmd, DiscIO::Platform platform);
@@ -119,7 +120,8 @@ private:
   static void ReloadTextures(Core::System& system);
 
   void SetRunningGameMetadata(const std::string& game_id, const std::string& gametdb_id,
-                              u64 title_id, u16 revision, DiscIO::Region region);
+                              u64 title_id, u16 revision, DiscIO::Region region,
+                              u32 simulated_memory_size);
 
   static SConfig* m_Instance;
   mutable std::recursive_mutex m_metadata_lock;
@@ -130,4 +132,6 @@ private:
   std::string m_title_description;
   u64 m_title_id;
   u16 m_revision;
+  // Memory size requested by game's header.
+  u32 m_simulated_memory_size;
 };
diff --git a/Source/Core/Core/DolphinAnalytics.cpp b/Source/Core/Core/DolphinAnalytics.cpp
index 1fff6bc5c5..8ae3bf6bcf 100644
--- a/Source/Core/Core/DolphinAnalytics.cpp
+++ b/Source/Core/Core/DolphinAnalytics.cpp
@@ -354,6 +354,9 @@ void DolphinAnalytics::MakePerGameBuilder()
   // Unique id bound to the gameid.
   builder.AddData("id", MakeUniqueId(SConfig::GetInstance().GetGameID()));
 
+  // Other game-specific fields.
+  builder.AddData("simulated-memory-size", SConfig::GetInstance().GetSimulatedMemorySize());
+
   // Configuration.
   builder.AddData("cfg-dsp-hle", Config::Get(Config::MAIN_DSP_HLE));
   builder.AddData("cfg-dsp-jit", Config::Get(Config::MAIN_DSP_JIT));
diff --git a/Source/Core/Core/FifoPlayer/FifoDataFile.cpp b/Source/Core/Core/FifoPlayer/FifoDataFile.cpp
index f795d5f08a..0e1e44aef9 100644
--- a/Source/Core/Core/FifoPlayer/FifoDataFile.cpp
+++ b/Source/Core/Core/FifoPlayer/FifoDataFile.cpp
@@ -140,7 +140,8 @@ bool FifoDataFile::Save(const std::string& filename)
   header.fileId = FILE_ID;
   header.file_version = VERSION_NUMBER;
   // Maintain backwards compatibility so long as the RAM sizes aren't overridden.
-  if (Config::Get(Config::MAIN_RAM_OVERRIDE_ENABLE))
+  if (Config::Get(Config::MAIN_RAM_OVERRIDE_ENABLE) ||
+      SConfig::GetInstance().GetSimulatedMemorySize() > Memory::MEM1_SIZE_RETAIL)
     header.min_loader_version = MIN_LOADER_VERSION_FOR_RAM_OVERRIDE;
   else
     header.min_loader_version = MIN_LOADER_VERSION;
diff --git a/Source/Core/Core/HW/Memmap.cpp b/Source/Core/Core/HW/Memmap.cpp
index e6d8fd56a5..054596e3d8 100644
--- a/Source/Core/Core/HW/Memmap.cpp
+++ b/Source/Core/Core/HW/Memmap.cpp
@@ -25,6 +25,7 @@
 #include "Common/MsgHandler.h"
 #include "Common/Swap.h"
 #include "Core/Config/MainSettings.h"
+#include "Core/ConfigManager.h"
 #include "Core/Core.h"
 #include "Core/HW/AudioInterface.h"
 #include "Core/HW/DSP.h"
@@ -87,10 +88,18 @@ void MemoryManager::InitMMIO(Core::System& system)
 
 void MemoryManager::Init()
 {
-  const auto get_mem1_size = [] {
+  const auto get_mem1_size = [this] {
     if (Config::Get(Config::MAIN_RAM_OVERRIDE_ENABLE))
       return Config::Get(Config::MAIN_MEM1_SIZE);
-    return Memory::MEM1_SIZE_RETAIL;
+    // The simulated memory size in the game's header was originally used to ask the Apploader to
+    // simulate a smaller memory size than that in development systems. That is, it could make the
+    // 48 MiB devkit act like a 24 MiB retail console during testing, or any other config.
+    //
+    // Dolphin is reusing this as a signal to automatically adjust the emulated memory size. The
+    // upper bound is clamped to 64 MiB (maximum supported by Flipper's memory controller),
+    // reflecting Apploader behaviour of clamping the simulated size to physical memory size. It is
+    // never desired to emulate less than a retail console, so the lower bound is clapped to 24 MiB.
+    return std::clamp(m_system.GetSimulatedMemorySize(), MEM1_SIZE_RETAIL, MEM1_SIZE_MAX);
   };
   const auto get_mem2_size = [] {
     if (Config::Get(Config::MAIN_RAM_OVERRIDE_ENABLE))
diff --git a/Source/Core/Core/HW/Memmap.h b/Source/Core/Core/HW/Memmap.h
index baa910cc70..e9253272f6 100644
--- a/Source/Core/Core/HW/Memmap.h
+++ b/Source/Core/Core/HW/Memmap.h
@@ -34,8 +34,10 @@ constexpr u32 MEM1_BASE_ADDR = 0x80000000U;
 constexpr u32 MEM2_BASE_ADDR = 0x90000000U;
 constexpr u32 MEM1_SIZE_RETAIL = 0x01800000U;
 constexpr u32 MEM1_SIZE_GDEV = 0x04000000U;
+constexpr u32 MEM1_SIZE_MAX = 0x04000000U;
 constexpr u32 MEM2_SIZE_RETAIL = 0x04000000U;
 constexpr u32 MEM2_SIZE_NDEV = 0x08000000U;
+constexpr u32 MEM2_SIZE_MAX = 0x08000000U;
 
 struct PhysicalMemoryRegion
 {
diff --git a/Source/Core/Core/IOS/IOS.cpp b/Source/Core/Core/IOS/IOS.cpp
index d3986775b6..49c0b2bbd3 100644
--- a/Source/Core/Core/IOS/IOS.cpp
+++ b/Source/Core/Core/IOS/IOS.cpp
@@ -221,8 +221,11 @@ static void ReleasePPCAncast(Core::System& system)
 void RAMOverrideForIOSMemoryValues(Memory::MemoryManager& memory, MemorySetupType setup_type)
 {
   // Don't touch anything if the feature isn't enabled.
-  if (!Config::Get(Config::MAIN_RAM_OVERRIDE_ENABLE))
+  if (!Config::Get(Config::MAIN_RAM_OVERRIDE_ENABLE) ||
+      SConfig::GetInstance().GetSimulatedMemorySize() <= Memory::MEM1_SIZE_RETAIL)
+  {
     return;
+  }
 
   // Some unstated constants that can be inferred.
   const u32 ipc_buffer_size =
diff --git a/Source/Core/Core/System.cpp b/Source/Core/Core/System.cpp
index 686d1a3264..12da7dcaea 100644
--- a/Source/Core/Core/System.cpp
+++ b/Source/Core/Core/System.cpp
@@ -119,6 +119,7 @@ void System::Initialize()
   m_separate_cpu_and_gpu_threads = Config::Get(Config::MAIN_CPU_THREAD);
   m_mmu_enabled = Config::Get(Config::MAIN_MMU);
   m_pause_on_panic_enabled = Config::Get(Config::MAIN_PAUSE_ON_PANIC);
+  m_simulated_memory_size = SConfig::GetInstance().GetSimulatedMemorySize();
 }
 
 SoundStream* System::GetSoundStream() const
diff --git a/Source/Core/Core/System.h b/Source/Core/Core/System.h
index a170c608ee..8524003400 100644
--- a/Source/Core/Core/System.h
+++ b/Source/Core/Core/System.h
@@ -5,6 +5,8 @@
 
 #include <memory>
 
+#include "Common/CommonTypes.h"
+
 class GeometryShaderManager;
 class Interpreter;
 class JitInterface;
@@ -147,6 +149,7 @@ public:
   bool IsTriforce() const { return m_is_triforce; }
   bool IsWii() const { return m_is_wii; }
   bool IsBranchWatchIgnoreApploader() { return m_branch_watch_ignore_apploader; }
+  u32 GetSimulatedMemorySize() const { return m_simulated_memory_size; }
 
   void SetIsMIOS(bool is_mios) { m_is_mios = is_mios; }
   void SetIsTriforce(bool is_triforce) { m_is_triforce = is_triforce; }
@@ -216,5 +219,6 @@ private:
   bool m_is_triforce = false;
   bool m_is_wii = false;
   bool m_branch_watch_ignore_apploader = false;
+  u32 m_simulated_memory_size{0};
 };
 }  // namespace Core
diff --git a/Source/Core/DiscIO/Volume.h b/Source/Core/DiscIO/Volume.h
index 7dfabb3e97..61df7e032f 100644
--- a/Source/Core/DiscIO/Volume.h
+++ b/Source/Core/DiscIO/Volume.h
@@ -126,6 +126,7 @@ public:
   }
   virtual Region GetRegion() const = 0;
   virtual Country GetCountry(const Partition& partition = PARTITION_NONE) const = 0;
+  virtual u32 GetSimulatedMemorySize() const = 0;
   virtual BlobType GetBlobType() const = 0;
   // Size of virtual disc (may be inaccurate depending on the blob type)
   virtual u64 GetDataSize() const = 0;
diff --git a/Source/Core/DiscIO/VolumeDisc.cpp b/Source/Core/DiscIO/VolumeDisc.cpp
index e842540376..4dd16c4cef 100644
--- a/Source/Core/DiscIO/VolumeDisc.cpp
+++ b/Source/Core/DiscIO/VolumeDisc.cpp
@@ -179,6 +179,14 @@ std::optional<u8> VolumeDisc::GetDiscNumber(const Partition& partition) const
   return ReadSwapped<u8>(6, partition);
 }
 
+u32 VolumeDisc::GetSimulatedMemorySize() const
+{
+  // Simulated memory size is a 32-bit unsigned integer in the `bi2.bin` file at offset `0x04`.
+  // Apploader reads this and "simulates" a smaller memory size. Originally useful for simulating
+  // 24 MiB of memory on devkits with 48 MiB.
+  return ReadSwapped<u32>(BI2_ADDRESS + 0x04, GetGamePartition()).value_or(0);
+}
+
 bool VolumeDisc::IsNKit() const
 {
   constexpr u32 NKIT_MAGIC = 0x4E4B4954;  // "NKIT"
diff --git a/Source/Core/DiscIO/VolumeDisc.h b/Source/Core/DiscIO/VolumeDisc.h
index f630522e68..1b3774a87d 100644
--- a/Source/Core/DiscIO/VolumeDisc.h
+++ b/Source/Core/DiscIO/VolumeDisc.h
@@ -47,6 +47,7 @@ public:
   std::string GetInternalName(const Partition& partition = PARTITION_NONE) const override;
   std::string GetApploaderDate(const Partition& partition) const override;
   std::optional<u8> GetDiscNumber(const Partition& partition = PARTITION_NONE) const override;
+  u32 GetSimulatedMemorySize() const override;
   bool IsNKit() const override;
 
 protected:
diff --git a/Source/Core/DiscIO/VolumeWad.h b/Source/Core/DiscIO/VolumeWad.h
index 2c383c0254..88a0847f80 100644
--- a/Source/Core/DiscIO/VolumeWad.h
+++ b/Source/Core/DiscIO/VolumeWad.h
@@ -61,6 +61,7 @@ public:
   bool IsNKit() const override;
   Region GetRegion() const override;
   Country GetCountry(const Partition& partition = PARTITION_NONE) const override;
+  u32 GetSimulatedMemorySize() const override { return 0; }
 
   BlobType GetBlobType() const override;
   u64 GetDataSize() const override;
diff --git a/Source/Core/DolphinQt/Settings/AdvancedPane.cpp b/Source/Core/DolphinQt/Settings/AdvancedPane.cpp
index a526e8c7cb..a2fc9c5410 100644
--- a/Source/Core/DolphinQt/Settings/AdvancedPane.cpp
+++ b/Source/Core/DolphinQt/Settings/AdvancedPane.cpp
@@ -276,10 +276,9 @@ void AdvancedPane::CreateLayout()
   });
 
   m_ram_override_checkbox->SetDescription(
-      tr("Adjusts the amount of RAM in the emulated console.<br><br>"
-         "<b>WARNING</b>: Enabling this will completely break many games.<br>Only a small "
-         "number "
-         "of games can benefit from this."
+      tr("Sets the amount of RAM in the emulated console to the values provided.<br><br>"
+         "<b>WARNING</b>: Enabling this will completely break many games. By default, Dolphin "
+         "determines what value is required based on the game information."
          "<br><br><dolphin_emphasis>If unsure, leave this unchecked.</dolphin_emphasis>"));
 
   auto* rtc_options = new QGroupBox(tr("Custom RTC Options"));
diff --git a/Source/UnitTests/Core/PowerPC/PageTableHostMappingTest.cpp b/Source/UnitTests/Core/PowerPC/PageTableHostMappingTest.cpp
index 2cfb4b8c8f..c2622cee37 100644
--- a/Source/UnitTests/Core/PowerPC/PageTableHostMappingTest.cpp
+++ b/Source/UnitTests/Core/PowerPC/PageTableHostMappingTest.cpp
@@ -10,6 +10,7 @@
 #include "Common/Align.h"
 #include "Common/CommonTypes.h"
 #include "Common/Swap.h"
+#include "Core/ConfigManager.h"
 #include "Core/Core.h"
 #include "Core/MemTools.h"
 #include "Core/PowerPC/BreakPoints.h"
@@ -131,6 +132,8 @@ public:
     if (!EMM::IsExceptionHandlerSupported())
       GTEST_SKIP() << "Skipping PageTableHostMappingTest because exception handler is unsupported.";
 
+    SConfig::Init();
+
     auto& system = Core::System::GetInstance();
     auto& memory = system.GetMemory();
     const u32 host_page_size = memory.GetHostPageSize();
@@ -177,6 +180,8 @@ public:
     EMM::UninstallExceptionHandler();
     Core::UndeclareAsCPUThread();
     system.GetMemory().Shutdown();
+
+    SConfig::Shutdown();
   }
 
   static void SetSR(size_t index, u32 vsid)