9 files changed, 40 insertions, 74 deletions

diff --git a/src/citra_qt/bootmanager.cpp b/src/citra_qt/bootmanager.cpp
index c7eb2aafc..bb75633b6 100644
--- a/src/citra_qt/bootmanager.cpp
+++ b/src/citra_qt/bootmanager.cpp
@@ -14,8 +14,6 @@
 #include "common/scm_rev.h"
 #include "common/string_util.h"
 #include "core/core.h"
-#include "core/settings.h"
-#include "core/system.h"
 #include "video_core/debug_utils/debug_utils.h"
 #include "video_core/video_core.h"
 
@@ -38,7 +36,7 @@ void EmuThread::run() {
             if (!was_active)
                 emit DebugModeLeft();
 
-            Core::RunLoop();
+            Core::System::GetInstance().RunLoop();
 
             was_active = running || exec_step;
             if (!was_active && !stop_run)
@@ -48,7 +46,7 @@ void EmuThread::run() {
                 emit DebugModeLeft();
 
             exec_step = false;
-            Core::SingleStep();
+            Core::System::GetInstance().SingleStep();
             emit DebugModeEntered();
             yieldCurrentThread();
 
@@ -60,7 +58,7 @@ void EmuThread::run() {
     }
 
     // Shutdown the core emulation
-    System::Shutdown();
+    Core::System::GetInstance().Shutdown();
 
 #if MICROPROFILE_ENABLED
     MicroProfileOnThreadExit();
diff --git a/src/citra_qt/configure_general.cpp b/src/citra_qt/configure_general.cpp
index 27139fb30..03cd8835b 100644
--- a/src/citra_qt/configure_general.cpp
+++ b/src/citra_qt/configure_general.cpp
@@ -4,8 +4,8 @@
 
 #include "citra_qt/configure_general.h"
 #include "citra_qt/ui_settings.h"
+#include "core/core.h"
 #include "core/settings.h"
-#include "core/system.h"
 #include "ui_configure_general.h"
 
 ConfigureGeneral::ConfigureGeneral(QWidget* parent)
@@ -14,7 +14,7 @@ ConfigureGeneral::ConfigureGeneral(QWidget* parent)
     ui->setupUi(this);
     this->setConfiguration();
 
-    ui->toggle_cpu_jit->setEnabled(!System::IsPoweredOn());
+    ui->toggle_cpu_jit->setEnabled(!Core::System::GetInstance().IsPoweredOn());
 }
 
 ConfigureGeneral::~ConfigureGeneral() {}
diff --git a/src/citra_qt/configure_graphics.cpp b/src/citra_qt/configure_graphics.cpp
index 36f10c8d7..cea7db388 100644
--- a/src/citra_qt/configure_graphics.cpp
+++ b/src/citra_qt/configure_graphics.cpp
@@ -3,8 +3,8 @@
 // Refer to the license.txt file included.
 
 #include "citra_qt/configure_graphics.h"
+#include "core/core.h"
 #include "core/settings.h"
-#include "core/system.h"
 #include "ui_configure_graphics.h"
 
 ConfigureGraphics::ConfigureGraphics(QWidget* parent)
@@ -13,7 +13,7 @@ ConfigureGraphics::ConfigureGraphics(QWidget* parent)
     ui->setupUi(this);
     this->setConfiguration();
 
-    ui->toggle_vsync->setEnabled(!System::IsPoweredOn());
+    ui->toggle_vsync->setEnabled(!Core::System::GetInstance().IsPoweredOn());
 }
 
 ConfigureGraphics::~ConfigureGraphics() {}
diff --git a/src/citra_qt/configure_system.cpp b/src/citra_qt/configure_system.cpp
index 873d314ec..eb1276ef3 100644
--- a/src/citra_qt/configure_system.cpp
+++ b/src/citra_qt/configure_system.cpp
@@ -6,7 +6,6 @@
 #include "citra_qt/ui_settings.h"
 #include "core/hle/service/cfg/cfg.h"
 #include "core/hle/service/fs/archive.h"
-#include "core/system.h"
 #include "ui_configure_system.h"
 
 static const std::array<int, 12> days_in_month = {{
@@ -24,7 +23,7 @@ ConfigureSystem::ConfigureSystem(QWidget* parent) : QWidget(parent), ui(new Ui::
 ConfigureSystem::~ConfigureSystem() {}
 
 void ConfigureSystem::setConfiguration() {
-    enabled = !System::IsPoweredOn();
+    enabled = !Core::System::GetInstance().IsPoweredOn();
 
     if (!enabled) {
         ReadSystemSettings();
diff --git a/src/citra_qt/debugger/callstack.cpp b/src/citra_qt/debugger/callstack.cpp
index c66f2b96a..c1db93583 100644
--- a/src/citra_qt/debugger/callstack.cpp
+++ b/src/citra_qt/debugger/callstack.cpp
@@ -25,7 +25,7 @@ CallstackWidget::CallstackWidget(QWidget* parent) : QDockWidget(parent) {
 
 void CallstackWidget::OnDebugModeEntered() {
     // Stack pointer
-    const u32 sp = Core::g_app_core->GetReg(13);
+    const u32 sp = Core::CPU().GetReg(13);
 
     Clear();
 
diff --git a/src/citra_qt/debugger/disassembler.cpp b/src/citra_qt/debugger/disassembler.cpp
index 1ee6bbd6a..e9c8ad858 100644
--- a/src/citra_qt/debugger/disassembler.cpp
+++ b/src/citra_qt/debugger/disassembler.cpp
@@ -185,13 +185,13 @@ DisassemblerWidget::DisassemblerWidget(QWidget* parent, EmuThread* emu_thread)
 }
 
 void DisassemblerWidget::Init() {
-    model->ParseFromAddress(Core::g_app_core->GetPC());
+    model->ParseFromAddress(Core::CPU().GetPC());
 
     disasm_ui.treeView->resizeColumnToContents(0);
     disasm_ui.treeView->resizeColumnToContents(1);
     disasm_ui.treeView->resizeColumnToContents(2);
 
-    QModelIndex model_index = model->IndexFromAbsoluteAddress(Core::g_app_core->GetPC());
+    QModelIndex model_index = model->IndexFromAbsoluteAddress(Core::CPU().GetPC());
     disasm_ui.treeView->scrollTo(model_index);
     disasm_ui.treeView->selectionModel()->setCurrentIndex(
         model_index, QItemSelectionModel::SelectCurrent | QItemSelectionModel::Rows);
@@ -214,8 +214,8 @@ void DisassemblerWidget::OnPause() {
     emu_thread->SetRunning(false);
 
     // TODO: By now, the CPU might not have actually stopped...
-    if (Core::g_app_core) {
-        model->SetNextInstruction(Core::g_app_core->GetPC());
+    if (Core::System::GetInstance().IsPoweredOn()) {
+        model->SetNextInstruction(Core::CPU().GetPC());
     }
 }
 
@@ -224,7 +224,7 @@ void DisassemblerWidget::OnToggleStartStop() {
 }
 
 void DisassemblerWidget::OnDebugModeEntered() {
-    u32 next_instr = Core::g_app_core->GetPC();
+    u32 next_instr = Core::CPU().GetPC();
 
     if (model->GetBreakPoints().IsAddressBreakPoint(next_instr))
         emu_thread->SetRunning(false);
diff --git a/src/citra_qt/debugger/registers.cpp b/src/citra_qt/debugger/registers.cpp
index 4c529d3c3..b982bc58b 100644
--- a/src/citra_qt/debugger/registers.cpp
+++ b/src/citra_qt/debugger/registers.cpp
@@ -58,16 +58,16 @@ RegistersWidget::RegistersWidget(QWidget* parent) : QDockWidget(parent) {
 }
 
 void RegistersWidget::OnDebugModeEntered() {
-    if (!Core::g_app_core)
+    if (!Core::System::GetInstance().IsPoweredOn())
         return;
 
     for (int i = 0; i < core_registers->childCount(); ++i)
         core_registers->child(i)->setText(
-            1, QString("0x%1").arg(Core::g_app_core->GetReg(i), 8, 16, QLatin1Char('0')));
+            1, QString("0x%1").arg(Core::CPU().GetReg(i), 8, 16, QLatin1Char('0')));
 
     for (int i = 0; i < vfp_registers->childCount(); ++i)
         vfp_registers->child(i)->setText(
-            1, QString("0x%1").arg(Core::g_app_core->GetVFPReg(i), 8, 16, QLatin1Char('0')));
+            1, QString("0x%1").arg(Core::CPU().GetVFPReg(i), 8, 16, QLatin1Char('0')));
 
     UpdateCPSRValues();
     UpdateVFPSystemRegisterValues();
@@ -127,7 +127,7 @@ void RegistersWidget::CreateCPSRChildren() {
 }
 
 void RegistersWidget::UpdateCPSRValues() {
-    const u32 cpsr_val = Core::g_app_core->GetCPSR();
+    const u32 cpsr_val = Core::CPU().GetCPSR();
 
     cpsr->setText(1, QString("0x%1").arg(cpsr_val, 8, 16, QLatin1Char('0')));
     cpsr->child(0)->setText(
@@ -191,10 +191,10 @@ void RegistersWidget::CreateVFPSystemRegisterChildren() {
 }
 
 void RegistersWidget::UpdateVFPSystemRegisterValues() {
-    const u32 fpscr_val = Core::g_app_core->GetVFPSystemReg(VFP_FPSCR);
-    const u32 fpexc_val = Core::g_app_core->GetVFPSystemReg(VFP_FPEXC);
-    const u32 fpinst_val = Core::g_app_core->GetVFPSystemReg(VFP_FPINST);
-    const u32 fpinst2_val = Core::g_app_core->GetVFPSystemReg(VFP_FPINST2);
+    const u32 fpscr_val = Core::CPU().GetVFPSystemReg(VFP_FPSCR);
+    const u32 fpexc_val = Core::CPU().GetVFPSystemReg(VFP_FPEXC);
+    const u32 fpinst_val = Core::CPU().GetVFPSystemReg(VFP_FPINST);
+    const u32 fpinst2_val = Core::CPU().GetVFPSystemReg(VFP_FPINST2);
 
     QTreeWidgetItem* const fpscr = vfp_system_registers->child(0);
     fpscr->setText(1, QString("0x%1").arg(fpscr_val, 8, 16, QLatin1Char('0')));
diff --git a/src/citra_qt/debugger/wait_tree.cpp b/src/citra_qt/debugger/wait_tree.cpp
index 5a308bf7f..1d2de5185 100644
--- a/src/citra_qt/debugger/wait_tree.cpp
+++ b/src/citra_qt/debugger/wait_tree.cpp
@@ -391,7 +391,7 @@ WaitTreeWidget::WaitTreeWidget(QWidget* parent) : QDockWidget(tr("Wait Tree"), p
 }
 
 void WaitTreeWidget::OnDebugModeEntered() {
-    if (!Core::g_app_core)
+    if (!Core::System::GetInstance().IsPoweredOn())
         return;
     model->InitItems();
     view->setModel(model);
diff --git a/src/citra_qt/main.cpp b/src/citra_qt/main.cpp
index e16d3196c..6d59cf640 100644
--- a/src/citra_qt/main.cpp
+++ b/src/citra_qt/main.cpp
@@ -46,7 +46,6 @@
 #include "core/gdbstub/gdbstub.h"
 #include "core/loader/loader.h"
 #include "core/settings.h"
-#include "core/system.h"
 #include "qhexedit.h"
 #include "video_core/video_core.h"
 
@@ -274,7 +273,7 @@ void GMainWindow::OnDisplayTitleBars(bool show) {
     }
 }
 
-bool GMainWindow::InitializeSystem(u32 system_mode) {
+bool GMainWindow::LoadROM(const std::string& filename) {
     // Shutdown previous session if the emu thread is still active...
     if (emu_thread != nullptr)
         ShutdownGame();
@@ -290,54 +289,25 @@ bool GMainWindow::InitializeSystem(u32 system_mode) {
         return false;
     }
 
-    // Initialize the core emulation
-    System::Result system_result = System::Init(render_window, system_mode);
-    if (System::Result::Success != system_result) {
-        switch (system_result) {
-        case System::Result::ErrorInitVideoCore:
-            QMessageBox::critical(this, tr("Error while starting Citra!"),
-                                  tr("Failed to initialize the video core!\n\n"
-                                     "Please ensure that your GPU supports OpenGL 3.3 and that you "
-                                     "have the latest graphics driver."));
-            break;
-
-        default:
-            QMessageBox::critical(this, tr("Error while starting Citra!"),
-                                  tr("Unknown error (please check the log)!"));
-            break;
-        }
-        return false;
-    }
-    return true;
-}
-
-bool GMainWindow::LoadROM(const std::string& filename) {
-    std::unique_ptr<Loader::AppLoader> app_loader = Loader::GetLoader(filename);
-    if (!app_loader) {
-        LOG_CRITICAL(Frontend, "Failed to obtain loader for %s!", filename.c_str());
-        QMessageBox::critical(this, tr("Error while loading ROM!"),
-                              tr("The ROM format is not supported."));
-        return false;
-    }
+    Core::System& system{Core::System::GetInstance()};
 
-    boost::optional<u32> system_mode = app_loader->LoadKernelSystemMode();
-    if (!system_mode) {
-        LOG_CRITICAL(Frontend, "Failed to load ROM!");
-        QMessageBox::critical(this, tr("Error while loading ROM!"),
-                              tr("Could not determine the system mode."));
-        return false;
-    }
+    const Core::System::ResultStatus result{system.Load(render_window, filename)};
 
-    if (!InitializeSystem(system_mode.get()))
-        return false;
+    if (result != Core::System::ResultStatus::Success) {
+        switch (result) {
+        case Core::System::ResultStatus::ErrorGetLoader:
+            LOG_CRITICAL(Frontend, "Failed to obtain loader for %s!", filename.c_str());
+            QMessageBox::critical(this, tr("Error while loading ROM!"),
+                                  tr("The ROM format is not supported."));
+            break;
 
-    Loader::ResultStatus result = app_loader->Load();
-    if (Loader::ResultStatus::Success != result) {
-        System::Shutdown();
-        LOG_CRITICAL(Frontend, "Failed to load ROM!");
+        case Core::System::ResultStatus::ErrorSystemMode:
+            LOG_CRITICAL(Frontend, "Failed to load ROM!");
+            QMessageBox::critical(this, tr("Error while loading ROM!"),
+                                  tr("Could not determine the system mode."));
+            break;
 
-        switch (result) {
-        case Loader::ResultStatus::ErrorEncrypted: {
+        case Core::System::ResultStatus::ErrorLoader_ErrorEncrypted: {
             // Build the MessageBox ourselves to have clickable link
             QMessageBox popup_error;
             popup_error.setTextFormat(Qt::RichText);
@@ -352,11 +322,10 @@ bool GMainWindow::LoadROM(const std::string& filename) {
             popup_error.exec();
             break;
         }
-        case Loader::ResultStatus::ErrorInvalidFormat:
+        case Core::System::ResultStatus::ErrorLoader_ErrorInvalidFormat:
             QMessageBox::critical(this, tr("Error while loading ROM!"),
                                   tr("The ROM format is not supported."));
             break;
-        case Loader::ResultStatus::Error:
 
         default:
             QMessageBox::critical(this, tr("Error while loading ROM!"), tr("Unknown error!"));